/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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:14:44,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:14:44,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:14:44,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:14:44,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 20:14:44,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 20:14:44,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 20:14:44,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 20:14:44,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 20:14:44,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 20:14:44,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 20:14:44,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 20:14:44,505 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 20:14:44,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 20:14:44,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 20:14:44,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 20:14:44,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 20:14:44,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 20:14:44,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:14:44,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:14:44,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:14:44,522 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 20:14:44,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:14:44,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:14:44,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:14:44,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:14:44,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:14:44,535 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:14:44,535 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:14:44,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:14:44,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:14:44,536 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:14:44,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:14:44,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:14:44,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:14:44,536 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:14:44,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:14:44,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:14:44,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:14:44,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:14:44,537 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:14:44,537 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:14:44,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:14:44,537 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:14:44,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:14:44,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:14:44,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:14:44,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:14:44,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:14:44,716 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:14:44,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2022-04-06 20:14:44,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1767f405b/d12abfe00e6f47d78f800b43ea324d52/FLAG5d4775f67 [2022-04-06 20:14:45,069 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:14:45,069 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2022-04-06 20:14:45,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1767f405b/d12abfe00e6f47d78f800b43ea324d52/FLAG5d4775f67 [2022-04-06 20:14:45,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1767f405b/d12abfe00e6f47d78f800b43ea324d52 [2022-04-06 20:14:45,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:14:45,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:14:45,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:14:45,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:14:45,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:14:45,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db0b7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45, skipping insertion in model container [2022-04-06 20:14:45,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:14:45,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:14:45,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2022-04-06 20:14:45,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:14:45,685 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:14:45,693 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2022-04-06 20:14:45,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:14:45,705 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:14:45,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45 WrapperNode [2022-04-06 20:14:45,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:14:45,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:14:45,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:14:45,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:14:45,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:14:45,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:14:45,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:14:45,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:14:45,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (1/1) ... [2022-04-06 20:14:45,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:14:45,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:45,752 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 20:14:45,780 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 20:14:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:14:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:14:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:14:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:14:45,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:14:45,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:14:45,797 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:14:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:14:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:14:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:14:45,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:14:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:14:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:14:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:14:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:14:45,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:14:45,847 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:14:45,848 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:14:45,932 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:14:45,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:14:45,935 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:14:45,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:14:45 BoogieIcfgContainer [2022-04-06 20:14:45,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:14:45,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:14:45,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:14:45,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:14:45,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:14:45" (1/3) ... [2022-04-06 20:14:45,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a06d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:14:45, skipping insertion in model container [2022-04-06 20:14:45,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:14:45" (2/3) ... [2022-04-06 20:14:45,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a06d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:14:45, skipping insertion in model container [2022-04-06 20:14:45,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:14:45" (3/3) ... [2022-04-06 20:14:45,941 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2022-04-06 20:14:45,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:14:45,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:14:45,972 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:14:45,976 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 20:14:45,976 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:14:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:14:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:14:45,989 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:45,989 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:45,989 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1676006891, now seen corresponding path program 1 times [2022-04-06 20:14:46,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:46,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1724140915] [2022-04-06 20:14:46,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:14:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1676006891, now seen corresponding path program 2 times [2022-04-06 20:14:46,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843102038] [2022-04-06 20:14:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:46,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110889606] [2022-04-06 20:14:46,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:14:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:46,108 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 20:14:46,109 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 20:14:46,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 20:14:46,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:46,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 20:14:46,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:46,249 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 20:14:46,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:14:46,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:46,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843102038] [2022-04-06 20:14:46,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:46,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110889606] [2022-04-06 20:14:46,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110889606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:46,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:46,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:14:46,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1724140915] [2022-04-06 20:14:46,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1724140915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:46,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:46,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:14:46,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363039523] [2022-04-06 20:14:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:46,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:14:46,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:14:46,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:14:46,282 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 20:14:46,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:46,315 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-06 20:14:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:14:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 12 [2022-04-06 20:14:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:46,327 INFO L225 Difference]: With dead ends: 35 [2022-04-06 20:14:46,327 INFO L226 Difference]: Without dead ends: 16 [2022-04-06 20:14:46,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:14:46,332 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:46,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:14:46,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-06 20:14:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-04-06 20:14:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 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 20:14:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-04-06 20:14:46,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-04-06 20:14:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:46,355 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-04-06 20:14:46,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 20:14:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-04-06 20:14:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:14:46,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:46,356 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:46,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:14:46,576 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,SelfDestructingSolverStorable0 [2022-04-06 20:14:46,577 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:46,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1072109235, now seen corresponding path program 1 times [2022-04-06 20:14:46,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:46,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045266307] [2022-04-06 20:14:46,587 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:46,587 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1072109235, now seen corresponding path program 2 times [2022-04-06 20:14:46,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:46,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250166773] [2022-04-06 20:14:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:46,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:46,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:46,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314548700] [2022-04-06 20:14:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:14:46,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:46,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:46,611 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 20:14:46,612 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 20:14:46,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:14:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:14:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:46,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250166773] [2022-04-06 20:14:46,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314548700] [2022-04-06 20:14:46,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314548700] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:46,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:46,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 20:14:46,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045266307] [2022-04-06 20:14:46,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045266307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:46,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:46,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:14:46,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801952194] [2022-04-06 20:14:46,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:46,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:14:46,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:46,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:14:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:14:46,918 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 20:14:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:46,960 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-04-06 20:14:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:14:46,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 14 [2022-04-06 20:14:46,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:46,961 INFO L225 Difference]: With dead ends: 22 [2022-04-06 20:14:46,961 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:14:46,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:14:46,962 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:46,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 48 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:14:46,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:14:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:14:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 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 20:14:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-04-06 20:14:46,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-04-06 20:14:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:46,966 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-04-06 20:14:46,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 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 20:14:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-04-06 20:14:46,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:14:46,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:46,966 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:46,988 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 20:14:47,182 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,SelfDestructingSolverStorable1 [2022-04-06 20:14:47,183 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:47,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:47,183 INFO L85 PathProgramCache]: Analyzing trace with hash 606819281, now seen corresponding path program 3 times [2022-04-06 20:14:47,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:47,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438883005] [2022-04-06 20:14:47,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:47,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 606819281, now seen corresponding path program 4 times [2022-04-06 20:14:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:47,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179559315] [2022-04-06 20:14:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:47,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:47,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:47,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353502415] [2022-04-06 20:14:47,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:14:47,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:47,194 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 20:14:47,195 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 20:14:47,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:14:47,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:14:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:47,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:14:47,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179559315] [2022-04-06 20:14:47,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353502415] [2022-04-06 20:14:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353502415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:47,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:47,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2022-04-06 20:14:47,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438883005] [2022-04-06 20:14:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438883005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:47,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:47,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:14:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530664554] [2022-04-06 20:14:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:47,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:14:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:14:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:14:47,576 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 20:14:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:47,634 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-04-06 20:14:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:14:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 16 [2022-04-06 20:14:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:47,635 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:14:47,635 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:14:47,635 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:14:47,636 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:47,636 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:14:47,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:14:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 20:14:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 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 20:14:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-04-06 20:14:47,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-04-06 20:14:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:47,639 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-04-06 20:14:47,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 20:14:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-04-06 20:14:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:14:47,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:47,640 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:47,658 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 20:14:47,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:47,858 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash 139772271, now seen corresponding path program 5 times [2022-04-06 20:14:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1534493059] [2022-04-06 20:14:47,860 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:47,860 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash 139772271, now seen corresponding path program 6 times [2022-04-06 20:14:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:47,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701942597] [2022-04-06 20:14:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:47,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:47,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690753795] [2022-04-06 20:14:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:14:47,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:47,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:47,870 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 20:14:47,871 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 20:14:47,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 20:14:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:14:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:48,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 20:14:48,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:48,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701942597] [2022-04-06 20:14:48,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:48,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690753795] [2022-04-06 20:14:48,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690753795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:48,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:48,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-04-06 20:14:48,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1534493059] [2022-04-06 20:14:48,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1534493059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:48,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:48,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:14:48,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418265681] [2022-04-06 20:14:48,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:48,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:14:48,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:48,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:14:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:14:48,346 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 20:14:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:48,413 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-04-06 20:14:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:14:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 18 [2022-04-06 20:14:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:48,414 INFO L225 Difference]: With dead ends: 26 [2022-04-06 20:14:48,414 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 20:14:48,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:14:48,415 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:48,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:14:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 20:14:48,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-04-06 20:14:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 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 20:14:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-04-06 20:14:48,418 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-04-06 20:14:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:48,419 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-04-06 20:14:48,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 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 20:14:48,419 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-04-06 20:14:48,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:14:48,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:48,419 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:48,438 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 20:14:48,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:48,620 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2015805555, now seen corresponding path program 7 times [2022-04-06 20:14:48,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:48,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [39188134] [2022-04-06 20:14:48,622 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:48,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:48,622 INFO L85 PathProgramCache]: Analyzing trace with hash -2015805555, now seen corresponding path program 8 times [2022-04-06 20:14:48,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:48,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178832353] [2022-04-06 20:14:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:48,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:48,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:48,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856729032] [2022-04-06 20:14:48,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:14:48,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:48,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:48,633 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 20:14:48,634 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 20:14:48,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:14:48,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:48,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 20:14:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:14:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178832353] [2022-04-06 20:14:49,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856729032] [2022-04-06 20:14:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856729032] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:49,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:49,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2022-04-06 20:14:49,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [39188134] [2022-04-06 20:14:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [39188134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:49,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:49,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:14:49,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195169031] [2022-04-06 20:14:49,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:49,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:14:49,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:49,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:14:49,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:14:49,187 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 20:14:49,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:49,265 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-04-06 20:14:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:14:49,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 20 [2022-04-06 20:14:49,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:49,266 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:14:49,266 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:14:49,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:14:49,267 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:49,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 90 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:14:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 20:14:49,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 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 20:14:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-04-06 20:14:49,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-04-06 20:14:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:49,270 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-04-06 20:14:49,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 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 20:14:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-04-06 20:14:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:14:49,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:49,271 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:49,325 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 20:14:49,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:49,472 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:49,472 INFO L85 PathProgramCache]: Analyzing trace with hash 943107627, now seen corresponding path program 9 times [2022-04-06 20:14:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:49,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [622491759] [2022-04-06 20:14:49,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:49,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:49,474 INFO L85 PathProgramCache]: Analyzing trace with hash 943107627, now seen corresponding path program 10 times [2022-04-06 20:14:49,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:49,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231545073] [2022-04-06 20:14:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:49,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:49,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252616716] [2022-04-06 20:14:49,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:14:49,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:49,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:49,487 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 20:14:49,488 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 20:14:49,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:14:49,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:14:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:49,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:14:50,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:50,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231545073] [2022-04-06 20:14:50,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:50,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252616716] [2022-04-06 20:14:50,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252616716] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:50,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:50,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 21 [2022-04-06 20:14:50,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:50,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [622491759] [2022-04-06 20:14:50,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [622491759] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:50,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:50,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:14:50,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640658637] [2022-04-06 20:14:50,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:50,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:14:50,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:14:50,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:14:50,192 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 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 20:14:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:50,299 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-04-06 20:14:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:14:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 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 22 [2022-04-06 20:14:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:50,300 INFO L225 Difference]: With dead ends: 30 [2022-04-06 20:14:50,300 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:14:50,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:14:50,301 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:50,301 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 104 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:14:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 20:14:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 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 20:14:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-04-06 20:14:50,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-04-06 20:14:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:50,305 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-04-06 20:14:50,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 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 20:14:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-04-06 20:14:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 20:14:50,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:50,305 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:50,322 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 20:14:50,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:50,514 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1190325577, now seen corresponding path program 11 times [2022-04-06 20:14:50,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:50,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203136364] [2022-04-06 20:14:50,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:50,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1190325577, now seen corresponding path program 12 times [2022-04-06 20:14:50,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:50,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099882071] [2022-04-06 20:14:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:50,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:50,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:50,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432918624] [2022-04-06 20:14:50,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:14:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:50,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:50,533 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 20:14:50,534 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 20:14:50,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:14:50,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:14:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:50,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 20:14:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099882071] [2022-04-06 20:14:51,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432918624] [2022-04-06 20:14:51,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432918624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:51,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:51,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 23 [2022-04-06 20:14:51,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203136364] [2022-04-06 20:14:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203136364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:51,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:14:51,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442357718] [2022-04-06 20:14:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:51,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:14:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:14:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:14:51,443 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 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 20:14:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:51,573 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-06 20:14:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:14:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 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 24 [2022-04-06 20:14:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:51,574 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:14:51,574 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:14:51,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:14:51,575 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:51,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 118 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:14:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 20:14:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 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 20:14:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-04-06 20:14:51,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-04-06 20:14:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:51,578 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-04-06 20:14:51,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 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 20:14:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-04-06 20:14:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:14:51,579 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:51,579 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:51,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:14:51,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:51,796 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1751393049, now seen corresponding path program 13 times [2022-04-06 20:14:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:51,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1478537812] [2022-04-06 20:14:51,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:51,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1751393049, now seen corresponding path program 14 times [2022-04-06 20:14:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:51,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361079212] [2022-04-06 20:14:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:51,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:51,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:51,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429844197] [2022-04-06 20:14:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:14:51,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:51,827 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 20:14:51,836 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 20:14:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:14:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:14:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:52,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:14:53,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361079212] [2022-04-06 20:14:53,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429844197] [2022-04-06 20:14:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429844197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:53,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:53,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 25 [2022-04-06 20:14:53,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1478537812] [2022-04-06 20:14:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1478537812] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:53,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:53,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:14:53,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025256003] [2022-04-06 20:14:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:53,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:14:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:14:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:14:53,143 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 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 20:14:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:53,307 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 20:14:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:14:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 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 26 [2022-04-06 20:14:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:53,308 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:14:53,308 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:14:53,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:14:53,309 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:53,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:14:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 20:14:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 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 20:14:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-04-06 20:14:53,313 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-04-06 20:14:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:53,313 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-04-06 20:14:53,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 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 20:14:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-04-06 20:14:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:14:53,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:53,314 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:53,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:14:53,517 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,SelfDestructingSolverStorable7 [2022-04-06 20:14:53,517 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1640455429, now seen corresponding path program 15 times [2022-04-06 20:14:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [78963040] [2022-04-06 20:14:53,518 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:53,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:53,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1640455429, now seen corresponding path program 16 times [2022-04-06 20:14:53,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:53,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608319311] [2022-04-06 20:14:53,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:53,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:53,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:53,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890772282] [2022-04-06 20:14:53,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:14:53,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:53,530 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 20:14:53,580 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 20:14:53,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:14:53,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:53,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:14:53,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:53,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:14:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:55,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608319311] [2022-04-06 20:14:55,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:55,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890772282] [2022-04-06 20:14:55,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890772282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:55,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:55,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 27 [2022-04-06 20:14:55,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:55,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [78963040] [2022-04-06 20:14:55,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [78963040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:55,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:55,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:14:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6462107] [2022-04-06 20:14:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:55,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:14:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:55,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:14:55,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:14:55,117 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 20:14:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:55,275 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-04-06 20:14:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:14:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 28 [2022-04-06 20:14:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:55,278 INFO L225 Difference]: With dead ends: 36 [2022-04-06 20:14:55,278 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 20:14:55,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:14:55,281 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:55,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 20:14:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 20:14:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 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 20:14:55,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-06 20:14:55,316 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-04-06 20:14:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:55,316 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-06 20:14:55,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 20:14:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-06 20:14:55,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:14:55,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:55,318 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:55,355 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 20:14:55,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:55,531 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1326665123, now seen corresponding path program 17 times [2022-04-06 20:14:55,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:55,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1718544250] [2022-04-06 20:14:55,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:55,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:55,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1326665123, now seen corresponding path program 18 times [2022-04-06 20:14:55,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:55,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921725903] [2022-04-06 20:14:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:55,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:55,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117010502] [2022-04-06 20:14:55,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:14:55,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:55,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:55,558 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 20:14:55,561 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 20:14:55,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 20:14:55,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:14:55,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:55,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 20:14:56,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:56,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921725903] [2022-04-06 20:14:56,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:56,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117010502] [2022-04-06 20:14:56,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117010502] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:56,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:56,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 29 [2022-04-06 20:14:56,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:56,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1718544250] [2022-04-06 20:14:56,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1718544250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:56,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:56,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:14:56,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027572234] [2022-04-06 20:14:56,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:56,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:14:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:14:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:14:56,799 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 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 20:14:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:56,948 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-04-06 20:14:56,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:14:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 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 30 [2022-04-06 20:14:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:56,949 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:14:56,949 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:14:56,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:14:56,950 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:56,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 167 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:14:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 20:14:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 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 20:14:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-04-06 20:14:56,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-04-06 20:14:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:56,953 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-04-06 20:14:56,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 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 20:14:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-04-06 20:14:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:14:56,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:56,954 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:56,985 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 20:14:57,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:14:57,181 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash 421891777, now seen corresponding path program 19 times [2022-04-06 20:14:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:57,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497958365] [2022-04-06 20:14:57,182 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:57,182 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash 421891777, now seen corresponding path program 20 times [2022-04-06 20:14:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:57,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985394253] [2022-04-06 20:14:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:57,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:57,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:57,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158241856] [2022-04-06 20:14:57,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:14:57,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:57,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:57,193 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 20:14:57,196 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 20:14:57,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:14:57,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 20:14:57,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:14:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-06 20:14:58,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:14:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985394253] [2022-04-06 20:14:58,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:14:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158241856] [2022-04-06 20:14:58,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158241856] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:14:58,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:14:58,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 31 [2022-04-06 20:14:58,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:14:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497958365] [2022-04-06 20:14:58,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497958365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:14:58,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:14:58,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:14:58,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890449212] [2022-04-06 20:14:58,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:14:58,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:14:58,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:14:58,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:14:58,936 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 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 20:14:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:14:59,101 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-04-06 20:14:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:14:59,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 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 32 [2022-04-06 20:14:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:14:59,108 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:14:59,108 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:14:59,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:14:59,109 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:14:59,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:14:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:14:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 20:14:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 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 20:14:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-04-06 20:14:59,112 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-04-06 20:14:59,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:14:59,113 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-04-06 20:14:59,113 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 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 20:14:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-04-06 20:14:59,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:14:59,113 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:14:59,113 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:14:59,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 20:14:59,327 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,SelfDestructingSolverStorable10 [2022-04-06 20:14:59,327 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:14:59,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:14:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1481899937, now seen corresponding path program 21 times [2022-04-06 20:14:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:14:59,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266555705] [2022-04-06 20:14:59,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:14:59,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:14:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1481899937, now seen corresponding path program 22 times [2022-04-06 20:14:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:14:59,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153555892] [2022-04-06 20:14:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:14:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:14:59,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:14:59,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156113129] [2022-04-06 20:14:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:14:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:14:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:14:59,339 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 20:14:59,340 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 20:14:59,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:14:59,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:14:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:14:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:14:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:14:59,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 20:15:03,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153555892] [2022-04-06 20:15:03,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:03,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156113129] [2022-04-06 20:15:03,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156113129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:03,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:03,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 33 [2022-04-06 20:15:03,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:03,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266555705] [2022-04-06 20:15:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266555705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:03,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:15:03,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096555532] [2022-04-06 20:15:03,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:03,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:15:03,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:03,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:15:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=960, Unknown=1, NotChecked=0, Total=1056 [2022-04-06 20:15:03,722 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 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 20:15:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:03,934 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-04-06 20:15:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:15:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 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 34 [2022-04-06 20:15:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:03,935 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:15:03,935 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:15:03,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=106, Invalid=1083, Unknown=1, NotChecked=0, Total=1190 [2022-04-06 20:15:03,935 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:03,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 188 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:15:03,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:15:03,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 20:15:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 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 20:15:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-04-06 20:15:03,943 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-04-06 20:15:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:03,943 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-04-06 20:15:03,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 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 20:15:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-04-06 20:15:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:15:03,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:03,944 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:03,963 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 20:15:04,162 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,SelfDestructingSolverStorable11 [2022-04-06 20:15:04,163 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1369668995, now seen corresponding path program 23 times [2022-04-06 20:15:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25945096] [2022-04-06 20:15:04,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:04,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1369668995, now seen corresponding path program 24 times [2022-04-06 20:15:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:04,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761247014] [2022-04-06 20:15:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:04,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:04,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:04,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634261873] [2022-04-06 20:15:04,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:15:04,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:04,191 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 20:15:04,192 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 20:15:04,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 20:15:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:15:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:04,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:15:06,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:06,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761247014] [2022-04-06 20:15:06,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:06,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634261873] [2022-04-06 20:15:06,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634261873] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:06,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:06,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 9] total 35 [2022-04-06 20:15:06,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:06,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25945096] [2022-04-06 20:15:06,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25945096] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:06,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:06,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:15:06,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261806565] [2022-04-06 20:15:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:06,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:15:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:15:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:15:06,467 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 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 20:15:06,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:06,803 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 20:15:06,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:15:06,803 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 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 36 [2022-04-06 20:15:06,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:06,804 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:15:06,804 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 20:15:06,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 12 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:15:06,804 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:06,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 209 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:15:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 20:15:06,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-04-06 20:15:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 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 20:15:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-04-06 20:15:06,809 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-04-06 20:15:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:06,809 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-04-06 20:15:06,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 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 20:15:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-04-06 20:15:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:15:06,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:06,810 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:06,829 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 20:15:07,019 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,SelfDestructingSolverStorable12 [2022-04-06 20:15:07,019 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:07,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash -889916133, now seen corresponding path program 25 times [2022-04-06 20:15:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853295583] [2022-04-06 20:15:07,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:07,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:07,021 INFO L85 PathProgramCache]: Analyzing trace with hash -889916133, now seen corresponding path program 26 times [2022-04-06 20:15:07,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:07,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746412133] [2022-04-06 20:15:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:07,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:07,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766836443] [2022-04-06 20:15:07,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:15:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:07,031 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 20:15:07,032 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 20:15:07,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:15:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:07,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:15:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:15:09,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746412133] [2022-04-06 20:15:09,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766836443] [2022-04-06 20:15:09,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766836443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:09,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:09,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 9] total 37 [2022-04-06 20:15:09,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:09,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853295583] [2022-04-06 20:15:09,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853295583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:09,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:09,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:15:09,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310642744] [2022-04-06 20:15:09,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:09,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:15:09,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:09,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:15:09,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1225, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:15:09,641 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 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 20:15:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:09,982 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-04-06 20:15:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:15:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 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 38 [2022-04-06 20:15:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:09,983 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:15:09,983 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:15:09,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:15:09,984 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:09,984 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 223 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:15:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:15:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-04-06 20:15:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 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 20:15:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-04-06 20:15:09,989 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-04-06 20:15:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:09,989 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-04-06 20:15:09,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 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 20:15:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-04-06 20:15:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:15:09,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:09,990 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:10,010 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 20:15:10,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:10,199 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:10,200 INFO L85 PathProgramCache]: Analyzing trace with hash 591083577, now seen corresponding path program 27 times [2022-04-06 20:15:10,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:10,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018956588] [2022-04-06 20:15:10,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:10,201 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:10,201 INFO L85 PathProgramCache]: Analyzing trace with hash 591083577, now seen corresponding path program 28 times [2022-04-06 20:15:10,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:10,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226733552] [2022-04-06 20:15:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:10,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:10,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017331927] [2022-04-06 20:15:10,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:15:10,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:10,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:10,210 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 20:15:10,226 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 20:15:10,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:15:10,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:10,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:15:10,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:10,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 20:15:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:13,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226733552] [2022-04-06 20:15:13,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017331927] [2022-04-06 20:15:13,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017331927] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:13,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:13,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 9] total 39 [2022-04-06 20:15:13,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:13,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018956588] [2022-04-06 20:15:13,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018956588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:13,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:13,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:15:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730366948] [2022-04-06 20:15:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:13,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:15:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:13,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:15:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:15:13,613 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 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 20:15:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:13,982 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-04-06 20:15:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:15:13,982 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 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 40 [2022-04-06 20:15:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:13,984 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:15:13,984 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 20:15:13,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:15:13,985 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:13,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 230 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:15:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 20:15:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 20:15:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 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 20:15:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-04-06 20:15:13,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-04-06 20:15:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:13,993 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-04-06 20:15:13,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 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 20:15:13,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-04-06 20:15:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:15:13,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:13,995 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:14,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 20:15:14,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:15:14,214 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2097337385, now seen corresponding path program 29 times [2022-04-06 20:15:14,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:14,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966578248] [2022-04-06 20:15:14,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:14,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2097337385, now seen corresponding path program 30 times [2022-04-06 20:15:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655388396] [2022-04-06 20:15:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:14,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483879646] [2022-04-06 20:15:14,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:15:14,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:14,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:14,226 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 20:15:14,227 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 20:15:14,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 20:15:14,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:14,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:15:14,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:14,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 20:15:19,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655388396] [2022-04-06 20:15:19,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:19,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483879646] [2022-04-06 20:15:19,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483879646] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:19,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:19,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 9] total 41 [2022-04-06 20:15:19,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966578248] [2022-04-06 20:15:19,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966578248] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:19,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:19,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:15:19,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121125742] [2022-04-06 20:15:19,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:19,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:15:19,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:15:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:15:19,661 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 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 20:15:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:20,082 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-04-06 20:15:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:15:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 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 42 [2022-04-06 20:15:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:20,083 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:15:20,083 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 20:15:20,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:15:20,084 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:20,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 251 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:15:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 20:15:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 20:15:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 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 20:15:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-04-06 20:15:20,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-04-06 20:15:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:20,089 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-04-06 20:15:20,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 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 20:15:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-04-06 20:15:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:15:20,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:20,090 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:20,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:15:20,290 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,SelfDestructingSolverStorable15 [2022-04-06 20:15:20,290 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:20,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash -99569675, now seen corresponding path program 31 times [2022-04-06 20:15:20,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:20,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1808786841] [2022-04-06 20:15:20,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:20,292 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -99569675, now seen corresponding path program 32 times [2022-04-06 20:15:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484650532] [2022-04-06 20:15:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:20,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345477571] [2022-04-06 20:15:20,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:15:20,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:20,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:20,319 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 20:15:20,328 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 20:15:20,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:15:20,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:20,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 20:15:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:20,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-04-06 20:15:24,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484650532] [2022-04-06 20:15:24,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345477571] [2022-04-06 20:15:24,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345477571] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:24,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:24,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 9] total 43 [2022-04-06 20:15:24,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1808786841] [2022-04-06 20:15:24,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1808786841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:24,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:24,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:15:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319971347] [2022-04-06 20:15:24,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:24,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:15:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:24,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:15:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1681, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:15:24,167 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 20:15:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:24,641 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-04-06 20:15:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:15:24,641 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 44 [2022-04-06 20:15:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:24,641 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:15:24,642 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:15:24,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=136, Invalid=1844, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:15:24,642 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:24,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 265 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:15:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:15:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-06 20:15:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 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 20:15:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-04-06 20:15:24,649 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-04-06 20:15:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:24,650 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-04-06 20:15:24,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 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 20:15:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-04-06 20:15:24,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:15:24,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:24,650 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:24,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:15:24,866 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,SelfDestructingSolverStorable16 [2022-04-06 20:15:24,867 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:24,867 INFO L85 PathProgramCache]: Analyzing trace with hash -95181677, now seen corresponding path program 33 times [2022-04-06 20:15:24,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:24,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162559395] [2022-04-06 20:15:24,868 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:24,868 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:24,868 INFO L85 PathProgramCache]: Analyzing trace with hash -95181677, now seen corresponding path program 34 times [2022-04-06 20:15:24,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:24,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157516320] [2022-04-06 20:15:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:24,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:24,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836658761] [2022-04-06 20:15:24,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:15:24,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:24,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:24,882 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 20:15:24,883 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 20:15:24,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:15:24,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:24,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:15:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:25,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 20:15:30,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:30,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157516320] [2022-04-06 20:15:30,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836658761] [2022-04-06 20:15:30,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836658761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:30,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:30,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 9] total 45 [2022-04-06 20:15:30,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162559395] [2022-04-06 20:15:30,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162559395] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:30,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:30,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:15:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844380752] [2022-04-06 20:15:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:30,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:15:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:15:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:15:30,133 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 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 20:15:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:30,675 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 20:15:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:15:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 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 46 [2022-04-06 20:15:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:30,676 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:15:30,676 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:15:30,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 17 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:15:30,676 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:30,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 279 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:15:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:15:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 20:15:30,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 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 20:15:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-04-06 20:15:30,681 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-04-06 20:15:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:30,681 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-04-06 20:15:30,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 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 20:15:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-04-06 20:15:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:15:30,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:30,682 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:30,698 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 20:15:30,891 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,SelfDestructingSolverStorable17 [2022-04-06 20:15:30,891 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:30,892 INFO L85 PathProgramCache]: Analyzing trace with hash -173282895, now seen corresponding path program 35 times [2022-04-06 20:15:30,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:30,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996496100] [2022-04-06 20:15:30,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:30,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash -173282895, now seen corresponding path program 36 times [2022-04-06 20:15:30,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:30,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501358769] [2022-04-06 20:15:30,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:30,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:30,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:30,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544770425] [2022-04-06 20:15:30,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:15:30,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:30,907 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 20:15:30,929 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 20:15:30,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 20:15:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:30,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:15:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:31,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 20:15:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501358769] [2022-04-06 20:15:36,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544770425] [2022-04-06 20:15:36,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544770425] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:36,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:36,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 9] total 47 [2022-04-06 20:15:36,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:36,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [996496100] [2022-04-06 20:15:36,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [996496100] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:36,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:36,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:15:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628315524] [2022-04-06 20:15:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:36,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:15:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:15:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:15:36,882 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 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 20:15:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:37,502 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-04-06 20:15:37,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:15:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 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 48 [2022-04-06 20:15:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:37,503 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:15:37,503 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:15:37,503 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 18 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=148, Invalid=2204, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:15:37,504 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:37,504 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 293 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:15:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:15:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-04-06 20:15:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 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 20:15:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-04-06 20:15:37,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-04-06 20:15:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:37,509 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-04-06 20:15:37,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 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 20:15:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-04-06 20:15:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:15:37,509 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:37,509 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:37,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:15:37,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:37,719 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2080857935, now seen corresponding path program 37 times [2022-04-06 20:15:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:37,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [210607866] [2022-04-06 20:15:37,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:37,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2080857935, now seen corresponding path program 38 times [2022-04-06 20:15:37,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:37,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754880815] [2022-04-06 20:15:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:37,728 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708121946] [2022-04-06 20:15:37,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:15:37,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:37,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:37,729 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 20:15:37,731 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 20:15:37,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:15:37,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:37,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 20:15:37,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:38,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 20:15:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754880815] [2022-04-06 20:15:44,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:44,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708121946] [2022-04-06 20:15:44,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708121946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:44,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:44,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 9] total 49 [2022-04-06 20:15:44,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:44,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [210607866] [2022-04-06 20:15:44,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [210607866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:44,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:44,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:15:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549772506] [2022-04-06 20:15:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:44,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:15:44,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:15:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:15:44,303 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 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 20:15:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:44,889 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-04-06 20:15:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:15:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 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 50 [2022-04-06 20:15:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:44,890 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:15:44,890 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:15:44,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 19 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=154, Invalid=2396, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:15:44,891 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:44,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 300 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:15:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:15:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-06 20:15:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 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 20:15:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-04-06 20:15:44,897 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-04-06 20:15:44,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:44,897 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-04-06 20:15:44,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 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 20:15:44,897 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-04-06 20:15:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:15:44,897 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:44,898 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:44,914 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 20:15:45,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:45,111 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash -648288915, now seen corresponding path program 39 times [2022-04-06 20:15:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:45,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [874069380] [2022-04-06 20:15:45,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:45,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:45,113 INFO L85 PathProgramCache]: Analyzing trace with hash -648288915, now seen corresponding path program 40 times [2022-04-06 20:15:45,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483482761] [2022-04-06 20:15:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:45,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:45,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:45,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220471447] [2022-04-06 20:15:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:15:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:45,121 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 20:15:45,140 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 20:15:45,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:15:45,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:45,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:15:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:46,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:15:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2022-04-06 20:15:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:15:53,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483482761] [2022-04-06 20:15:53,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:15:53,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220471447] [2022-04-06 20:15:53,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220471447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:15:53,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:15:53,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 9] total 51 [2022-04-06 20:15:53,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:15:53,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [874069380] [2022-04-06 20:15:53,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [874069380] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:15:53,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:15:53,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:15:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411426431] [2022-04-06 20:15:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:15:53,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:15:53,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:15:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2401, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:15:53,248 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 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 20:15:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:15:53,945 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-04-06 20:15:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:15:53,945 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 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 52 [2022-04-06 20:15:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:15:53,946 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:15:53,946 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 20:15:53,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 20 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=160, Invalid=2596, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:15:53,947 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:15:53,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:15:53,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 20:15:53,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 20:15:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 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 20:15:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-04-06 20:15:53,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-04-06 20:15:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:15:53,953 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-04-06 20:15:53,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 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 20:15:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-04-06 20:15:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:15:53,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:15:53,953 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:15:53,969 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 20:15:54,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:54,163 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:15:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:15:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 866606091, now seen corresponding path program 41 times [2022-04-06 20:15:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:15:54,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459340523] [2022-04-06 20:15:54,165 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:15:54,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:15:54,165 INFO L85 PathProgramCache]: Analyzing trace with hash 866606091, now seen corresponding path program 42 times [2022-04-06 20:15:54,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:15:54,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210384962] [2022-04-06 20:15:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:15:54,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:15:54,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:15:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854985685] [2022-04-06 20:15:54,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:15:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:15:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:15:54,173 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 20:15:54,174 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 20:15:54,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 20:15:54,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:15:54,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:15:54,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:15:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:15:55,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 20:16:03,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:03,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210384962] [2022-04-06 20:16:03,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:16:03,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854985685] [2022-04-06 20:16:03,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854985685] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:03,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:16:03,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 9] total 53 [2022-04-06 20:16:03,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:03,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459340523] [2022-04-06 20:16:03,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459340523] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:03,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:03,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:16:03,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405150343] [2022-04-06 20:16:03,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:03,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:16:03,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:16:03,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2601, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:16:03,466 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 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 20:16:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:04,285 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-04-06 20:16:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:16:04,290 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 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 54 [2022-04-06 20:16:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:04,291 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:16:04,291 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:16:04,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 35 SyntacticMatches, 21 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=166, Invalid=2804, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:16:04,292 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:04,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 335 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:16:04,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:16:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-06 20:16:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 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 20:16:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-04-06 20:16:04,302 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-04-06 20:16:04,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:04,303 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-04-06 20:16:04,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 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 20:16:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-04-06 20:16:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:16:04,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:04,303 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:04,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:16:04,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:04,504 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash 686793513, now seen corresponding path program 43 times [2022-04-06 20:16:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [867413561] [2022-04-06 20:16:04,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:16:04,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash 686793513, now seen corresponding path program 44 times [2022-04-06 20:16:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:04,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44089616] [2022-04-06 20:16:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:04,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:04,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:16:04,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656536798] [2022-04-06 20:16:04,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:16:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:04,536 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 20:16:04,537 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 20:16:04,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:16:04,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:04,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:16:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:16:05,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-04-06 20:16:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44089616] [2022-04-06 20:16:16,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:16:16,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656536798] [2022-04-06 20:16:16,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656536798] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:16,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:16:16,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 9] total 55 [2022-04-06 20:16:16,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:16,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [867413561] [2022-04-06 20:16:16,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [867413561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:16,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:16,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:16:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752487656] [2022-04-06 20:16:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:16,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:16:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:16:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2809, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:16:16,173 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 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 20:16:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:17,005 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 20:16:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:16:17,005 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 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 56 [2022-04-06 20:16:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:17,006 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:16:17,006 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:16:17,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 22 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=172, Invalid=3020, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:16:17,007 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:17,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 342 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:16:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:16:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-04-06 20:16:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 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 20:16:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-04-06 20:16:17,013 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-04-06 20:16:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:17,013 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-04-06 20:16:17,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 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 20:16:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-04-06 20:16:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:16:17,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:17,014 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:17,030 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 20:16:17,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:17,230 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:17,230 INFO L85 PathProgramCache]: Analyzing trace with hash -314402105, now seen corresponding path program 45 times [2022-04-06 20:16:17,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:17,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972410164] [2022-04-06 20:16:17,231 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:16:17,231 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash -314402105, now seen corresponding path program 46 times [2022-04-06 20:16:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985747391] [2022-04-06 20:16:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:17,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:17,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:16:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049505795] [2022-04-06 20:16:17,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:16:17,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:17,240 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 20:16:17,241 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 20:16:17,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:16:17,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:17,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:16:17,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:16:18,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 20:16:31,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:31,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985747391] [2022-04-06 20:16:31,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:16:31,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049505795] [2022-04-06 20:16:31,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049505795] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:31,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:16:31,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9] total 57 [2022-04-06 20:16:31,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:31,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972410164] [2022-04-06 20:16:31,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972410164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:31,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:31,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:16:31,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310303708] [2022-04-06 20:16:31,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:31,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:16:31,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:31,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:16:31,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:16:31,144 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 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 20:16:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:32,032 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-04-06 20:16:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:16:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 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 58 [2022-04-06 20:16:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:32,033 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:16:32,033 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:16:32,033 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 23 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=178, Invalid=3244, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:16:32,034 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:32,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 356 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:16:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:16:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 20:16:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 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 20:16:32,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-04-06 20:16:32,041 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-04-06 20:16:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:32,041 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-04-06 20:16:32,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 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 20:16:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-04-06 20:16:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:16:32,042 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:32,042 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:32,057 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 20:16:32,252 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:32,252 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash -390716699, now seen corresponding path program 47 times [2022-04-06 20:16:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:32,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761358725] [2022-04-06 20:16:32,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:16:32,254 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash -390716699, now seen corresponding path program 48 times [2022-04-06 20:16:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681008676] [2022-04-06 20:16:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:32,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:16:32,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760085486] [2022-04-06 20:16:32,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:16:32,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:32,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:32,275 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 20:16:32,276 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 20:16:32,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-04-06 20:16:32,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:32,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:16:32,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:16:33,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:16:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 20:16:49,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:16:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681008676] [2022-04-06 20:16:49,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:16:49,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760085486] [2022-04-06 20:16:49,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760085486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:16:49,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:16:49,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 9] total 59 [2022-04-06 20:16:49,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:16:49,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761358725] [2022-04-06 20:16:49,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761358725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:16:49,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:16:49,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:16:49,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87495026] [2022-04-06 20:16:49,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:16:49,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:16:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:16:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3249, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:16:49,874 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 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 20:16:50,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:16:50,880 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-04-06 20:16:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:16:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 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 60 [2022-04-06 20:16:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:16:50,881 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:16:50,881 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 20:16:50,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 24 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=184, Invalid=3476, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:16:50,881 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:16:50,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 370 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:16:50,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 20:16:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-04-06 20:16:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 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 20:16:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-04-06 20:16:50,888 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-04-06 20:16:50,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:16:50,889 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-04-06 20:16:50,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 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 20:16:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-04-06 20:16:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:16:50,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:16:50,889 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:16:50,907 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 20:16:51,105 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,SelfDestructingSolverStorable24 [2022-04-06 20:16:51,105 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:16:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:16:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash -714597501, now seen corresponding path program 49 times [2022-04-06 20:16:51,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:16:51,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1040259957] [2022-04-06 20:16:51,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:16:51,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:16:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash -714597501, now seen corresponding path program 50 times [2022-04-06 20:16:51,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:16:51,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631666627] [2022-04-06 20:16:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:16:51,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:16:51,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:16:51,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033899553] [2022-04-06 20:16:51,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:16:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:16:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:16:51,128 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 20:16:51,128 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 20:16:51,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:16:51,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:16:51,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 20:16:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:16:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:16:52,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2022-04-06 20:17:12,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:12,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631666627] [2022-04-06 20:17:12,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:17:12,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033899553] [2022-04-06 20:17:12,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033899553] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:12,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:17:12,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 9] total 61 [2022-04-06 20:17:12,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:12,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1040259957] [2022-04-06 20:17:12,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1040259957] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:12,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:12,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:17:12,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270144858] [2022-04-06 20:17:12,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:12,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:17:12,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:17:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3481, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:17:12,957 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 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 20:17:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:14,020 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-04-06 20:17:14,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:17:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 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 62 [2022-04-06 20:17:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:14,021 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:17:14,021 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:17:14,022 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 25 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=190, Invalid=3716, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:17:14,022 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 3023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:14,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 391 Invalid, 3023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:17:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:17:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-04-06 20:17:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 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 20:17:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-04-06 20:17:14,029 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-04-06 20:17:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:14,029 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-04-06 20:17:14,029 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 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 20:17:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-04-06 20:17:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:17:14,029 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:14,029 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:14,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:17:14,243 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,SelfDestructingSolverStorable25 [2022-04-06 20:17:14,243 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1568564385, now seen corresponding path program 51 times [2022-04-06 20:17:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:14,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [691748971] [2022-04-06 20:17:14,245 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:17:14,245 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:17:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1568564385, now seen corresponding path program 52 times [2022-04-06 20:17:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:14,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39888902] [2022-04-06 20:17:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:14,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:17:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408907482] [2022-04-06 20:17:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:17:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:14,252 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 20:17:14,255 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 20:17:14,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:17:14,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:14,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 20:17:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:15,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:17:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2022-04-06 20:17:41,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:17:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39888902] [2022-04-06 20:17:41,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:17:41,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408907482] [2022-04-06 20:17:41,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408907482] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:17:41,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:17:41,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 9] total 63 [2022-04-06 20:17:41,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:17:41,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [691748971] [2022-04-06 20:17:41,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [691748971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:17:41,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:17:41,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:17:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538885619] [2022-04-06 20:17:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:17:41,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:17:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:17:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3721, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:17:41,745 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 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 20:17:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:17:42,813 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-04-06 20:17:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:17:42,813 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 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 64 [2022-04-06 20:17:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:17:42,813 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:17:42,813 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:17:42,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 26 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=196, Invalid=3964, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:17:42,814 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 3191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:17:42,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 398 Invalid, 3192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3191 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:17:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:17:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 20:17:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 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 20:17:42,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-04-06 20:17:42,821 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-04-06 20:17:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:17:42,821 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-04-06 20:17:42,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 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 20:17:42,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-04-06 20:17:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:17:42,822 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:17:42,822 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:17:42,838 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 20:17:43,038 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,SelfDestructingSolverStorable26 [2022-04-06 20:17:43,038 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:17:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:17:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 958848575, now seen corresponding path program 53 times [2022-04-06 20:17:43,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:17:43,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282810801] [2022-04-06 20:17:43,040 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:17:43,040 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:17:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 958848575, now seen corresponding path program 54 times [2022-04-06 20:17:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:17:43,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283714197] [2022-04-06 20:17:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:17:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:17:43,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:17:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695362456] [2022-04-06 20:17:43,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:17:43,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:17:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:17:43,047 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 20:17:43,048 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 20:17:43,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-04-06 20:17:43,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:17:43,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 20:17:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:17:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:17:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:18:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 20:18:22,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:18:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283714197] [2022-04-06 20:18:22,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:18:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695362456] [2022-04-06 20:18:22,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695362456] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:18:22,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:18:22,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 9] total 65 [2022-04-06 20:18:22,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:18:22,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282810801] [2022-04-06 20:18:22,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282810801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:18:22,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:18:22,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:18:22,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464386194] [2022-04-06 20:18:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:18:22,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:18:22,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:18:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:18:22,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3969, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:18:22,718 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 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 20:18:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:18:24,053 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-04-06 20:18:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:18:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 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 66 [2022-04-06 20:18:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:18:24,054 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:18:24,054 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 20:18:24,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 41 SyntacticMatches, 27 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=202, Invalid=4220, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:18:24,055 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 3478 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:18:24,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 419 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3478 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:18:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 20:18:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-04-06 20:18:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 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 20:18:24,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-04-06 20:18:24,062 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-04-06 20:18:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:18:24,062 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-04-06 20:18:24,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 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 20:18:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-04-06 20:18:24,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:18:24,063 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:18:24,063 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:18:24,073 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 20:18:24,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:18:24,268 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:18:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:18:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -862492579, now seen corresponding path program 55 times [2022-04-06 20:18:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:18:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583016815] [2022-04-06 20:18:24,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:18:24,270 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:18:24,270 INFO L85 PathProgramCache]: Analyzing trace with hash -862492579, now seen corresponding path program 56 times [2022-04-06 20:18:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:18:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016387739] [2022-04-06 20:18:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:18:24,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:18:24,304 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:18:24,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455638792] [2022-04-06 20:18:24,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:18:24,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:18:24,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:18:24,305 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 20:18:24,317 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 20:18:24,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:18:24,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:18:24,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-06 20:18:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:18:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:18:26,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:19:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 20:19:10,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:19:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016387739] [2022-04-06 20:19:10,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:19:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455638792] [2022-04-06 20:19:10,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455638792] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:19:10,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:19:10,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 9] total 67 [2022-04-06 20:19:10,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:19:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583016815] [2022-04-06 20:19:10,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583016815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:19:10,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:19:10,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:19:10,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097156993] [2022-04-06 20:19:10,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:19:10,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:19:10,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:10,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:19:10,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4225, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:19:10,352 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 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 20:19:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:19:11,773 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-04-06 20:19:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:19:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 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 68 [2022-04-06 20:19:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:19:11,774 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:19:11,774 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:19:11,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 42 SyntacticMatches, 28 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=208, Invalid=4484, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:19:11,775 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:19:11,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 433 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:19:11,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:19:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-04-06 20:19:11,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 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 20:19:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-04-06 20:19:11,783 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-04-06 20:19:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:19:11,783 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-04-06 20:19:11,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 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 20:19:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-04-06 20:19:11,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 20:19:11,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:19:11,783 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:19:11,799 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 20:19:11,985 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,SelfDestructingSolverStorable28 [2022-04-06 20:19:11,985 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:19:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:19:11,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1175315195, now seen corresponding path program 57 times [2022-04-06 20:19:11,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:19:11,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1193020734] [2022-04-06 20:19:11,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:19:11,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:19:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1175315195, now seen corresponding path program 58 times [2022-04-06 20:19:11,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:19:11,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448282074] [2022-04-06 20:19:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:19:11,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:19:11,993 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:19:11,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781648196] [2022-04-06 20:19:11,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:19:11,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:19:11,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:19:11,996 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 20:19:12,003 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 20:19:12,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:19:12,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:19:12,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 124 conjunts are in the unsatisfiable core [2022-04-06 20:19:12,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:19:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:19:14,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:20:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-04-06 20:20:09,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:20:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448282074] [2022-04-06 20:20:09,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:20:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781648196] [2022-04-06 20:20:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781648196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:20:09,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:20:09,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 9] total 69 [2022-04-06 20:20:09,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:20:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1193020734] [2022-04-06 20:20:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1193020734] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:20:09,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:20:09,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:20:09,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683612519] [2022-04-06 20:20:09,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:20:09,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:20:09,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:20:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:20:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4489, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:20:09,864 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 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 20:20:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:20:11,439 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-04-06 20:20:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:20:11,439 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 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 70 [2022-04-06 20:20:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:20:11,440 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:20:11,440 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:20:11,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 43 SyntacticMatches, 29 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=214, Invalid=4756, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:20:11,441 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 3966 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 3967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:20:11,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 447 Invalid, 3967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3966 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:20:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:20:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 20:20:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 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 20:20:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-04-06 20:20:11,449 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-04-06 20:20:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:20:11,449 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-04-06 20:20:11,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 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 20:20:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-04-06 20:20:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 20:20:11,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:20:11,450 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:20:11,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:20:11,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:20:11,665 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:20:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:20:11,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1003499033, now seen corresponding path program 59 times [2022-04-06 20:20:11,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:20:11,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522564033] [2022-04-06 20:20:11,667 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:20:11,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:20:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1003499033, now seen corresponding path program 60 times [2022-04-06 20:20:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:20:11,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763059552] [2022-04-06 20:20:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:20:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:20:11,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:20:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553026259] [2022-04-06 20:20:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:20:11,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:20:11,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:20:11,693 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 20:20:11,694 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 20:20:11,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-04-06 20:20:11,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:20:11,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 20:20:11,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:20:14,457 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:20:14,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:21:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 20:21:27,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:21:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763059552] [2022-04-06 20:21:27,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:21:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553026259] [2022-04-06 20:21:27,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553026259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:21:27,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:21:27,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 9] total 71 [2022-04-06 20:21:27,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:21:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522564033] [2022-04-06 20:21:27,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522564033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:21:27,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:21:27,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:21:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585209885] [2022-04-06 20:21:27,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:21:27,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:21:27,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:21:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:21:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4761, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:21:27,417 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 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 20:21:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:21:29,065 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-04-06 20:21:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:21:29,065 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 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 72 [2022-04-06 20:21:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:21:29,068 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:21:29,068 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 20:21:29,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 30 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=220, Invalid=5036, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:21:29,073 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 4222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 4223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:21:29,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 461 Invalid, 4223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4222 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:21:29,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 20:21:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-04-06 20:21:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 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 20:21:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-04-06 20:21:29,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-04-06 20:21:29,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:21:29,101 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-04-06 20:21:29,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 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 20:21:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-04-06 20:21:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:21:29,102 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:21:29,102 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:21:29,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:21:29,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:21:29,308 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:21:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:21:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash -903075401, now seen corresponding path program 61 times [2022-04-06 20:21:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:21:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [694477201] [2022-04-06 20:21:29,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:21:29,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:21:29,309 INFO L85 PathProgramCache]: Analyzing trace with hash -903075401, now seen corresponding path program 62 times [2022-04-06 20:21:29,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:21:29,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371725248] [2022-04-06 20:21:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:21:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:21:29,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:21:29,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098696277] [2022-04-06 20:21:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:21:29,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:21:29,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:21:29,319 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 20:21:29,319 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 20:21:29,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:21:29,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:21:29,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 132 conjunts are in the unsatisfiable core [2022-04-06 20:21:29,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:21:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:21:32,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:22:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-04-06 20:22:57,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:22:57,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371725248] [2022-04-06 20:22:57,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:22:57,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098696277] [2022-04-06 20:22:57,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098696277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:22:57,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:22:57,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 9] total 73 [2022-04-06 20:22:57,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:22:57,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [694477201] [2022-04-06 20:22:57,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [694477201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:22:57,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:22:57,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:22:57,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820440082] [2022-04-06 20:22:57,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:22:57,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:22:57,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:22:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5041, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:22:57,722 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 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 20:22:59,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:22:59,707 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-04-06 20:22:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:22:59,708 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 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 74 [2022-04-06 20:22:59,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:22:59,708 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:22:59,708 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:22:59,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 45 SyntacticMatches, 31 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=226, Invalid=5324, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:22:59,709 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 4486 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 4487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:22:59,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 4487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4486 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:22:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:22:59,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-04-06 20:22:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 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 20:22:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-04-06 20:22:59,718 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-04-06 20:22:59,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:22:59,718 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-04-06 20:22:59,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 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 20:22:59,718 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-04-06 20:22:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 20:22:59,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:22:59,719 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:22:59,735 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 20:22:59,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:59,935 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:22:59,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:22:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash 829928917, now seen corresponding path program 63 times [2022-04-06 20:22:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:22:59,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562783179] [2022-04-06 20:22:59,937 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:22:59,937 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:22:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 829928917, now seen corresponding path program 64 times [2022-04-06 20:22:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:22:59,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718791403] [2022-04-06 20:22:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:22:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:22:59,942 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:22:59,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227319997] [2022-04-06 20:22:59,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:22:59,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:22:59,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:22:59,944 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 20:22:59,945 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 20:22:59,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:22:59,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:22:59,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 136 conjunts are in the unsatisfiable core [2022-04-06 20:22:59,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:23:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:23:02,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:24:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2022-04-06 20:24:53,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:24:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718791403] [2022-04-06 20:24:53,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:24:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227319997] [2022-04-06 20:24:53,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227319997] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:24:53,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:24:53,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9] total 75 [2022-04-06 20:24:53,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:24:53,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562783179] [2022-04-06 20:24:53,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562783179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:24:53,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:24:53,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:24:53,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639756668] [2022-04-06 20:24:53,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:24:53,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:24:53,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:24:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5329, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:24:53,147 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 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 20:24:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:24:54,881 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-04-06 20:24:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:24:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 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 76 [2022-04-06 20:24:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:24:54,882 INFO L225 Difference]: With dead ends: 84 [2022-04-06 20:24:54,882 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 20:24:54,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 46 SyntacticMatches, 32 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 112.0s TimeCoverageRelationStatistics Valid=232, Invalid=5620, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:24:54,883 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 4758 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 4759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:24:54,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 489 Invalid, 4759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4758 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:24:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 20:24:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 20:24:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 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 20:24:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-04-06 20:24:54,892 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-04-06 20:24:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:24:54,893 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-04-06 20:24:54,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 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 20:24:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-04-06 20:24:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 20:24:54,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:24:54,893 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:24:54,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 20:24:55,093 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,SelfDestructingSolverStorable32 [2022-04-06 20:24:55,094 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:24:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:24:55,100 INFO L85 PathProgramCache]: Analyzing trace with hash -200232333, now seen corresponding path program 65 times [2022-04-06 20:24:55,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:24:55,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1081068011] [2022-04-06 20:24:55,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:24:55,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:24:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash -200232333, now seen corresponding path program 66 times [2022-04-06 20:24:55,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:24:55,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114509292] [2022-04-06 20:24:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:24:55,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:24:55,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:24:55,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125386920] [2022-04-06 20:24:55,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:24:55,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:24:55,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:24:55,116 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 20:24:55,117 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 20:24:55,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-04-06 20:24:55,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:24:55,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 140 conjunts are in the unsatisfiable core [2022-04-06 20:24:55,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:24:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:24:58,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-04-06 20:27:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114509292] [2022-04-06 20:27:13,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 20:27:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125386920] [2022-04-06 20:27:13,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125386920] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:13,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 20:27:13,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 9] total 77 [2022-04-06 20:27:13,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1081068011] [2022-04-06 20:27:13,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1081068011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:13,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:13,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:27:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498711197] [2022-04-06 20:27:13,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:13,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:27:13,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:13,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:27:13,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5625, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:27:13,191 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 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 20:27:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:15,227 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-04-06 20:27:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:27:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 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 78 [2022-04-06 20:27:15,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:15,228 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:27:15,228 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 20:27:15,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 47 SyntacticMatches, 33 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 136.8s TimeCoverageRelationStatistics Valid=238, Invalid=5924, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:27:15,229 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 5038 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 5039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:15,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 503 Invalid, 5039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5038 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:27:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 20:27:15,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 20:27:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 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 20:27:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-04-06 20:27:15,239 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-04-06 20:27:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:15,239 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-04-06 20:27:15,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 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 20:27:15,239 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-04-06 20:27:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 20:27:15,240 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:15,240 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:15,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:15,453 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:15,453 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1952251793, now seen corresponding path program 67 times [2022-04-06 20:27:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046002142] [2022-04-06 20:27:15,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:15,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1952251793, now seen corresponding path program 68 times [2022-04-06 20:27:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:15,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120762581] [2022-04-06 20:27:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:15,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 20:27:15,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247586851] [2022-04-06 20:27:15,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:27:15,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:15,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:15,464 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 20:27:15,464 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 20:27:15,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:27:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:15,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 144 conjunts are in the unsatisfiable core [2022-04-06 20:27:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:18,614 INFO L328 TraceCheckSpWp]: Computing backward predicates...