/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:41:37,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:41:37,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:41:37,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:41:37,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:41:37,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:41:37,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:41:37,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:41:37,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:41:37,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:41:37,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:41:37,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:41:37,368 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:41:37,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:41:37,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:41:37,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:41:37,373 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:41:37,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:41:37,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:41:37,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:41:37,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:41:37,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:41:37,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:41:37,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:41:37,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:41:37,396 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:41:37,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:41:37,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:41:37,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:41:37,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:41:37,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:41:37,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:41:37,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:41:37,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:41:37,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:41:37,399 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:41:37,399 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:41:37,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:41:37,399 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:41:37,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:41:37,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:41:37,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:41:37,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:41:37,578 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:41:37,579 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:41:37,580 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-04-06 16:41:37,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7737187fc/6b36fc2dd2bc4f58ba238b9ae81836c1/FLAG58b77b1a6 [2022-04-06 16:41:37,984 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:41:37,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-04-06 16:41:37,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7737187fc/6b36fc2dd2bc4f58ba238b9ae81836c1/FLAG58b77b1a6 [2022-04-06 16:41:38,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7737187fc/6b36fc2dd2bc4f58ba238b9ae81836c1 [2022-04-06 16:41:38,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:41:38,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:41:38,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:41:38,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:41:38,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:41:38,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3b5f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38, skipping insertion in model container [2022-04-06 16:41:38,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:41:38,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:41:38,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-04-06 16:41:38,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:41:38,585 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:41:38,596 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-04-06 16:41:38,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:41:38,623 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:41:38,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38 WrapperNode [2022-04-06 16:41:38,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:41:38,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:41:38,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:41:38,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:41:38,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:41:38,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:41:38,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:41:38,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:41:38,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (1/1) ... [2022-04-06 16:41:38,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:41:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:38,685 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 16:41:38,692 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 16:41:38,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:41:38,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:41:38,713 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:41:38,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:41:38,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:41:38,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:41:38,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:41:38,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:41:38,714 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:41:38,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:41:38,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:41:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:41:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:41:38,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:41:38,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:41:38,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:41:38,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:41:38,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:41:38,716 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:41:38,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:41:38,763 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:41:38,764 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:41:38,936 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:41:38,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:41:38,942 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 16:41:38,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:41:38 BoogieIcfgContainer [2022-04-06 16:41:38,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:41:38,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:41:38,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:41:38,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:41:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:41:38" (1/3) ... [2022-04-06 16:41:38,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74744c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:41:38, skipping insertion in model container [2022-04-06 16:41:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:41:38" (2/3) ... [2022-04-06 16:41:38,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74744c71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:41:38, skipping insertion in model container [2022-04-06 16:41:38,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:41:38" (3/3) ... [2022-04-06 16:41:38,950 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2022-04-06 16:41:38,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:41:38,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:41:38,990 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:41:38,996 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 16:41:38,997 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:41:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:41:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:41:39,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:39,024 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:39,025 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-04-06 16:41:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:39,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [391910678] [2022-04-06 16:41:39,043 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:39,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 2 times [2022-04-06 16:41:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:39,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466986230] [2022-04-06 16:41:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:39,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:41:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:41:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:41:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:39,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:41:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:41:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:41:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:39,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:39,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466986230] [2022-04-06 16:41:39,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466986230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:39,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:39,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:41:39,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:39,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [391910678] [2022-04-06 16:41:39,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [391910678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:39,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:39,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:41:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849529223] [2022-04-06 16:41:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:39,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:41:39,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:41:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:41:39,256 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:39,339 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-04-06 16:41:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:41:39,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:41:39,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:39,345 INFO L225 Difference]: With dead ends: 73 [2022-04-06 16:41:39,346 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 16:41:39,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 16:41:39,355 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:39,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:39,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 16:41:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 16:41:39,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 16:41:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 16:41:39,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-06 16:41:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:39,396 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 16:41:39,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 16:41:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 16:41:39,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:39,398 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:39,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:41:39,399 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:39,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-04-06 16:41:39,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:39,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985984062] [2022-04-06 16:41:39,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 2 times [2022-04-06 16:41:39,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:39,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415736996] [2022-04-06 16:41:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:39,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:39,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:39,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101911500] [2022-04-06 16:41:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:39,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:39,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:39,430 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 16:41:39,431 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 16:41:39,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:41:39,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 16:41:39,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:39,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:39,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:39,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415736996] [2022-04-06 16:41:39,699 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:39,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101911500] [2022-04-06 16:41:39,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101911500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:39,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:39,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:41:39,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:39,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985984062] [2022-04-06 16:41:39,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985984062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:39,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:39,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:41:39,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500360348] [2022-04-06 16:41:39,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:39,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:41:39,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:39,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:41:39,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:41:39,702 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:39,829 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-04-06 16:41:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:41:39,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-06 16:41:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:39,831 INFO L225 Difference]: With dead ends: 54 [2022-04-06 16:41:39,831 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 16:41:39,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:41:39,832 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:39,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 173 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 16:41:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 16:41:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:41:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-06 16:41:39,842 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 34 [2022-04-06 16:41:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:39,842 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-06 16:41:39,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-06 16:41:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 16:41:39,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:39,843 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:39,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 16:41:40,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:40,052 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-04-06 16:41:40,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:40,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8309854] [2022-04-06 16:41:40,053 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:40,053 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 2 times [2022-04-06 16:41:40,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155292523] [2022-04-06 16:41:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:40,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269469221] [2022-04-06 16:41:40,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:40,069 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 16:41:40,070 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 16:41:40,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:40,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:40,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:41:40,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:41:40,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:41:40,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155292523] [2022-04-06 16:41:40,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:40,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269469221] [2022-04-06 16:41:40,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269469221] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:40,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:40,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:41:40,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:40,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8309854] [2022-04-06 16:41:40,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8309854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:40,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:40,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:41:40,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987006242] [2022-04-06 16:41:40,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:40,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:41:40,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:40,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:41:40,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:41:40,381 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:40,543 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-04-06 16:41:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:41:40,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-06 16:41:40,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:40,545 INFO L225 Difference]: With dead ends: 103 [2022-04-06 16:41:40,545 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 16:41:40,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:41:40,546 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 58 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:40,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 16:41:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-06 16:41:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:41:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-06 16:41:40,558 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-06 16:41:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:40,559 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-06 16:41:40,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:41:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-06 16:41:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 16:41:40,559 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:40,559 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:40,578 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 16:41:40,777 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,SelfDestructingSolverStorable2 [2022-04-06 16:41:40,778 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:40,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:40,778 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-04-06 16:41:40,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:40,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931305583] [2022-04-06 16:41:40,779 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 2 times [2022-04-06 16:41:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:40,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954274414] [2022-04-06 16:41:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:40,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:40,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:40,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376597804] [2022-04-06 16:41:40,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:40,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:40,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:40,801 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 16:41:40,802 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 16:41:40,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:40,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:40,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 16:41:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:41:41,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:41,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:41,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954274414] [2022-04-06 16:41:41,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376597804] [2022-04-06 16:41:41,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376597804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:41,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:41,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2022-04-06 16:41:41,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:41,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931305583] [2022-04-06 16:41:41,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931305583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:41,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:41,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:41:41,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9958984] [2022-04-06 16:41:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:41,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:41:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:41:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:41:41,347 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 16:41:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:41,684 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2022-04-06 16:41:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:41:41,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2022-04-06 16:41:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:41,687 INFO L225 Difference]: With dead ends: 112 [2022-04-06 16:41:41,687 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 16:41:41,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:41:41,691 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 63 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:41,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 297 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:41:41,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 16:41:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-04-06 16:41:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 16:41:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-04-06 16:41:41,708 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2022-04-06 16:41:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:41,709 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-04-06 16:41:41,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 16:41:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-04-06 16:41:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:41:41,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:41,710 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:41,728 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 16:41:41,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:41,916 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:41,916 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-04-06 16:41:41,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:41,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [347459696] [2022-04-06 16:41:41,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 2 times [2022-04-06 16:41:41,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:41,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779290562] [2022-04-06 16:41:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:41,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:41,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461402019] [2022-04-06 16:41:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:41,928 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 16:41:41,928 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 16:41:41,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:41:41,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:41:42,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 16:41:42,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:42,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779290562] [2022-04-06 16:41:42,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:42,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461402019] [2022-04-06 16:41:42,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461402019] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:41:42,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:41:42,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 16:41:42,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:42,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [347459696] [2022-04-06 16:41:42,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [347459696] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:42,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:42,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662637902] [2022-04-06 16:41:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:42,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:41:42,189 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:41:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:42,234 INFO L93 Difference]: Finished difference Result 130 states and 179 transitions. [2022-04-06 16:41:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:41:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-06 16:41:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:42,236 INFO L225 Difference]: With dead ends: 130 [2022-04-06 16:41:42,236 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 16:41:42,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:41:42,237 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:42,237 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 141 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 16:41:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-04-06 16:41:42,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 76 states have (on average 1.263157894736842) internal successors, (96), 77 states have internal predecessors, (96), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 16:41:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 172 transitions. [2022-04-06 16:41:42,253 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 172 transitions. Word has length 47 [2022-04-06 16:41:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:42,254 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 172 transitions. [2022-04-06 16:41:42,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:41:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 172 transitions. [2022-04-06 16:41:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:41:42,255 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:42,255 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:42,273 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 16:41:42,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:42,472 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-04-06 16:41:42,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:42,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011179341] [2022-04-06 16:41:42,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 2 times [2022-04-06 16:41:42,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:42,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069611003] [2022-04-06 16:41:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:42,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:42,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:42,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346828681] [2022-04-06 16:41:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:42,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:42,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:42,483 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 16:41:42,486 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 16:41:42,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:42,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 16:41:42,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 16:41:42,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069611003] [2022-04-06 16:41:42,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:42,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346828681] [2022-04-06 16:41:42,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346828681] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:42,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:42,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-04-06 16:41:42,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:42,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011179341] [2022-04-06 16:41:42,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011179341] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:42,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:42,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:41:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927464168] [2022-04-06 16:41:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:42,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:41:42,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:41:42,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:41:42,919 INFO L87 Difference]: Start difference. First operand 123 states and 172 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:41:43,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:43,093 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-04-06 16:41:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:41:43,093 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2022-04-06 16:41:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:43,094 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:41:43,094 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 16:41:43,095 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:41:43,095 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 87 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:43,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 218 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 16:41:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-04-06 16:41:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 83 states have internal predecessors, (102), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 16:41:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 178 transitions. [2022-04-06 16:41:43,111 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 178 transitions. Word has length 47 [2022-04-06 16:41:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:43,111 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 178 transitions. [2022-04-06 16:41:43,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:41:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 178 transitions. [2022-04-06 16:41:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 16:41:43,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:43,112 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:43,132 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 16:41:43,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:43,333 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 3 times [2022-04-06 16:41:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:43,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282437851] [2022-04-06 16:41:43,334 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:43,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 4 times [2022-04-06 16:41:43,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:43,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655585092] [2022-04-06 16:41:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:43,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:43,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:43,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641848282] [2022-04-06 16:41:43,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:43,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:43,343 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 16:41:43,344 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 16:41:43,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:41:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:41:43,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:43,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655585092] [2022-04-06 16:41:43,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641848282] [2022-04-06 16:41:43,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641848282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:43,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:43,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:43,436 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282437851] [2022-04-06 16:41:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282437851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:43,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:43,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:43,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538834027] [2022-04-06 16:41:43,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:43,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:43,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:43,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:41:43,437 INFO L87 Difference]: Start difference. First operand 131 states and 178 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:43,499 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2022-04-06 16:41:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:41:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-04-06 16:41:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:43,501 INFO L225 Difference]: With dead ends: 170 [2022-04-06 16:41:43,501 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 16:41:43,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:41:43,502 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:43,502 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 155 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 16:41:43,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2022-04-06 16:41:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 66 states have internal predecessors, (77), 31 states have call successors, (31), 10 states have call predecessors, (31), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 16:41:43,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 137 transitions. [2022-04-06 16:41:43,514 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 137 transitions. Word has length 47 [2022-04-06 16:41:43,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:43,514 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 137 transitions. [2022-04-06 16:41:43,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:41:43,515 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 137 transitions. [2022-04-06 16:41:43,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 16:41:43,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:43,515 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:43,532 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 16:41:43,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:43,732 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:43,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:43,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-04-06 16:41:43,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:43,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485181585] [2022-04-06 16:41:43,733 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:43,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 2 times [2022-04-06 16:41:43,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:43,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124062117] [2022-04-06 16:41:43,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:43,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:43,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:43,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112068942] [2022-04-06 16:41:43,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:43,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:43,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:43,742 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 16:41:43,743 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 16:41:43,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:43,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:43,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:41:43,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:41:43,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:43,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:43,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124062117] [2022-04-06 16:41:43,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112068942] [2022-04-06 16:41:43,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112068942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:43,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:43,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:43,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485181585] [2022-04-06 16:41:43,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485181585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:43,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:43,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71796510] [2022-04-06 16:41:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:43,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:41:43,841 INFO L87 Difference]: Start difference. First operand 106 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:41:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:43,882 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2022-04-06 16:41:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:41:43,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-06 16:41:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:43,884 INFO L225 Difference]: With dead ends: 158 [2022-04-06 16:41:43,884 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 16:41:43,884 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:41:43,884 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:43,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 156 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 16:41:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2022-04-06 16:41:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 74 states have (on average 1.162162162162162) internal successors, (86), 81 states have internal predecessors, (86), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 16:41:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2022-04-06 16:41:43,901 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 52 [2022-04-06 16:41:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:43,901 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2022-04-06 16:41:43,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:41:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2022-04-06 16:41:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 16:41:43,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:43,902 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:43,925 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 16:41:44,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:44,119 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-04-06 16:41:44,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:44,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074090928] [2022-04-06 16:41:44,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 2 times [2022-04-06 16:41:44,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:44,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032131318] [2022-04-06 16:41:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:44,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:44,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:44,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546728240] [2022-04-06 16:41:44,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:44,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:44,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:44,136 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 16:41:44,138 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 16:41:44,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:44,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:44,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:41:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:41:44,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:41:45,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032131318] [2022-04-06 16:41:45,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546728240] [2022-04-06 16:41:45,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546728240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:45,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:45,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 16:41:45,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:45,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074090928] [2022-04-06 16:41:45,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074090928] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:45,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:45,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:41:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890279862] [2022-04-06 16:41:45,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:45,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:41:45,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:45,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:41:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:41:45,507 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:41:45,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:45,925 INFO L93 Difference]: Finished difference Result 200 states and 283 transitions. [2022-04-06 16:41:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:41:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2022-04-06 16:41:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:45,929 INFO L225 Difference]: With dead ends: 200 [2022-04-06 16:41:45,929 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 16:41:45,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:41:45,930 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:45,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 308 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:41:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 16:41:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-04-06 16:41:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 110 states have internal predecessors, (119), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 69 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 275 transitions. [2022-04-06 16:41:45,961 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 275 transitions. Word has length 64 [2022-04-06 16:41:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:45,962 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 275 transitions. [2022-04-06 16:41:45,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:41:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 275 transitions. [2022-04-06 16:41:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:41:45,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:45,966 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:45,982 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 16:41:46,182 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,SelfDestructingSolverStorable8 [2022-04-06 16:41:46,182 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 3 times [2022-04-06 16:41:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:46,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667382036] [2022-04-06 16:41:46,183 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 4 times [2022-04-06 16:41:46,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:46,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420966333] [2022-04-06 16:41:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:46,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:46,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236782721] [2022-04-06 16:41:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:46,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:46,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:46,200 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 16:41:46,201 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 16:41:46,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 16:41:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:41:46,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:41:46,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420966333] [2022-04-06 16:41:46,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:46,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236782721] [2022-04-06 16:41:46,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236782721] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:46,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:46,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 16:41:46,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667382036] [2022-04-06 16:41:46,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667382036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:46,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:46,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:41:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776173493] [2022-04-06 16:41:46,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:46,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:41:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:41:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:41:46,440 INFO L87 Difference]: Start difference. First operand 193 states and 275 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:46,739 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2022-04-06 16:41:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:41:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-04-06 16:41:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:46,741 INFO L225 Difference]: With dead ends: 288 [2022-04-06 16:41:46,741 INFO L226 Difference]: Without dead ends: 281 [2022-04-06 16:41:46,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:41:46,742 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 46 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:46,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 318 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:41:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-04-06 16:41:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 208. [2022-04-06 16:41:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.206896551724138) internal successors, (140), 122 states have internal predecessors, (140), 79 states have call successors, (79), 13 states have call predecessors, (79), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2022-04-06 16:41:46,781 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 69 [2022-04-06 16:41:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:46,781 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2022-04-06 16:41:46,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2022-04-06 16:41:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:41:46,782 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:46,782 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:46,806 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 16:41:46,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 16:41:46,995 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-04-06 16:41:46,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:46,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1932773461] [2022-04-06 16:41:46,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 2 times [2022-04-06 16:41:46,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:46,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191732100] [2022-04-06 16:41:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:46,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:47,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:47,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199509343] [2022-04-06 16:41:47,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:47,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:47,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:47,004 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 16:41:47,008 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 16:41:47,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:47,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:47,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:41:47,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 16:41:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-04-06 16:41:47,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191732100] [2022-04-06 16:41:47,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:47,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199509343] [2022-04-06 16:41:47,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199509343] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:41:47,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:41:47,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 16:41:47,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:47,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1932773461] [2022-04-06 16:41:47,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1932773461] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:47,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:47,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:47,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129577855] [2022-04-06 16:41:47,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:47,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:47,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:47,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:41:47,300 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:47,352 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-04-06 16:41:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:41:47,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-04-06 16:41:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:47,353 INFO L225 Difference]: With dead ends: 214 [2022-04-06 16:41:47,353 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 16:41:47,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:41:47,354 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:47,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:47,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 16:41:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 16:41:47,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 119 states have (on average 1.2016806722689075) internal successors, (143), 125 states have internal predecessors, (143), 79 states have call successors, (79), 14 states have call predecessors, (79), 13 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 299 transitions. [2022-04-06 16:41:47,378 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 299 transitions. Word has length 74 [2022-04-06 16:41:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:47,379 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 299 transitions. [2022-04-06 16:41:47,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 299 transitions. [2022-04-06 16:41:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 16:41:47,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:47,379 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:47,403 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 16:41:47,594 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,SelfDestructingSolverStorable10 [2022-04-06 16:41:47,594 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-04-06 16:41:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:47,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [526033664] [2022-04-06 16:41:47,595 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 2 times [2022-04-06 16:41:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:47,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106793770] [2022-04-06 16:41:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:47,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:47,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:47,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307208838] [2022-04-06 16:41:47,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:47,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:47,607 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 16:41:47,607 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 16:41:47,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:47,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 16:41:47,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 16:41:47,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 16:41:47,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106793770] [2022-04-06 16:41:47,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307208838] [2022-04-06 16:41:47,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307208838] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:47,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:47,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:41:47,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [526033664] [2022-04-06 16:41:47,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [526033664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:47,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:47,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:41:47,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28192344] [2022-04-06 16:41:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:47,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:41:47,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:41:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:41:47,870 INFO L87 Difference]: Start difference. First operand 212 states and 299 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:48,070 INFO L93 Difference]: Finished difference Result 226 states and 310 transitions. [2022-04-06 16:41:48,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:41:48,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2022-04-06 16:41:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:48,072 INFO L225 Difference]: With dead ends: 226 [2022-04-06 16:41:48,072 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 16:41:48,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:41:48,073 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:48,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 173 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:41:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 16:41:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-04-06 16:41:48,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 128 states have (on average 1.1875) internal successors, (152), 134 states have internal predecessors, (152), 79 states have call successors, (79), 17 states have call predecessors, (79), 16 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-04-06 16:41:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-04-06 16:41:48,108 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 72 [2022-04-06 16:41:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:48,108 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-04-06 16:41:48,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:41:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-04-06 16:41:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 16:41:48,109 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:48,109 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:48,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:41:48,325 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,SelfDestructingSolverStorable11 [2022-04-06 16:41:48,326 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 3 times [2022-04-06 16:41:48,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:48,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [441224937] [2022-04-06 16:41:48,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 4 times [2022-04-06 16:41:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456055274] [2022-04-06 16:41:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:48,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:48,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746796810] [2022-04-06 16:41:48,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:48,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:48,334 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 16:41:48,335 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 16:41:48,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:48,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 16:41:48,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:41:48,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:41:48,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:48,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456055274] [2022-04-06 16:41:48,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:48,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746796810] [2022-04-06 16:41:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746796810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:48,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:48,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:48,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [441224937] [2022-04-06 16:41:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [441224937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:48,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:48,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:41:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165303152] [2022-04-06 16:41:48,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:48,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:41:48,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:41:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:41:48,442 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 16:41:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:48,496 INFO L93 Difference]: Finished difference Result 367 states and 500 transitions. [2022-04-06 16:41:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:41:48,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-04-06 16:41:48,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:48,498 INFO L225 Difference]: With dead ends: 367 [2022-04-06 16:41:48,498 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 16:41:48,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:41:48,499 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:48,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 139 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:41:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 16:41:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 214. [2022-04-06 16:41:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 127 states have internal predecessors, (149), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-04-06 16:41:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 289 transitions. [2022-04-06 16:41:48,526 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 289 transitions. Word has length 77 [2022-04-06 16:41:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:48,526 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 289 transitions. [2022-04-06 16:41:48,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 16:41:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 289 transitions. [2022-04-06 16:41:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 16:41:48,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:48,527 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:48,543 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 16:41:48,743 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,SelfDestructingSolverStorable12 [2022-04-06 16:41:48,743 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 5 times [2022-04-06 16:41:48,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:48,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107597586] [2022-04-06 16:41:48,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 6 times [2022-04-06 16:41:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:48,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437640444] [2022-04-06 16:41:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:48,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593853035] [2022-04-06 16:41:48,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:41:48,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:48,757 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 16:41:48,758 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 16:41:48,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:41:48,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:48,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 16:41:48,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:41:49,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:49,830 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 16:41:49,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:49,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437640444] [2022-04-06 16:41:49,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:49,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593853035] [2022-04-06 16:41:49,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593853035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:49,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:49,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-04-06 16:41:49,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:49,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107597586] [2022-04-06 16:41:49,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107597586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:49,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:49,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:41:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966042918] [2022-04-06 16:41:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:49,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:41:49,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:41:49,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:41:49,892 INFO L87 Difference]: Start difference. First operand 214 states and 289 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:41:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:50,482 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2022-04-06 16:41:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:41:50,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 77 [2022-04-06 16:41:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:50,484 INFO L225 Difference]: With dead ends: 285 [2022-04-06 16:41:50,484 INFO L226 Difference]: Without dead ends: 283 [2022-04-06 16:41:50,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:41:50,485 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 59 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:50,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 388 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:41:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-04-06 16:41:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 265. [2022-04-06 16:41:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-04-06 16:41:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 357 transitions. [2022-04-06 16:41:50,528 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 357 transitions. Word has length 77 [2022-04-06 16:41:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:50,528 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 357 transitions. [2022-04-06 16:41:50,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 16:41:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 357 transitions. [2022-04-06 16:41:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 16:41:50,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:50,530 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:50,548 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 16:41:50,746 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,SelfDestructingSolverStorable13 [2022-04-06 16:41:50,746 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2022-04-06 16:41:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:50,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681420163] [2022-04-06 16:41:50,747 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 2 times [2022-04-06 16:41:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:50,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126343300] [2022-04-06 16:41:50,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:50,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:50,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:50,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497213717] [2022-04-06 16:41:50,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:41:50,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:50,755 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 16:41:50,756 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 16:41:50,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:41:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:50,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 16:41:50,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:41:51,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 16:41:53,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:53,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126343300] [2022-04-06 16:41:53,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:53,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497213717] [2022-04-06 16:41:53,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497213717] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:53,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:53,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-04-06 16:41:53,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:53,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681420163] [2022-04-06 16:41:53,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681420163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:53,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:53,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:41:53,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531199890] [2022-04-06 16:41:53,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:53,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:41:53,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:41:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:41:53,026 INFO L87 Difference]: Start difference. First operand 265 states and 357 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:41:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:41:54,070 INFO L93 Difference]: Finished difference Result 348 states and 475 transitions. [2022-04-06 16:41:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:41:54,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-04-06 16:41:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:41:54,072 INFO L225 Difference]: With dead ends: 348 [2022-04-06 16:41:54,072 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 16:41:54,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:41:54,072 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:41:54,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 310 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:41:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 16:41:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 330. [2022-04-06 16:41:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 191 states have (on average 1.193717277486911) internal successors, (228), 192 states have internal predecessors, (228), 115 states have call successors, (115), 24 states have call predecessors, (115), 23 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2022-04-06 16:41:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 456 transitions. [2022-04-06 16:41:54,117 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 456 transitions. Word has length 86 [2022-04-06 16:41:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:41:54,117 INFO L478 AbstractCegarLoop]: Abstraction has 330 states and 456 transitions. [2022-04-06 16:41:54,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 16:41:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 456 transitions. [2022-04-06 16:41:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 16:41:54,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:41:54,118 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:41:54,136 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 16:41:54,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:54,331 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:41:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:41:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 3 times [2022-04-06 16:41:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:54,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630404766] [2022-04-06 16:41:54,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:41:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 4 times [2022-04-06 16:41:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:41:54,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221064969] [2022-04-06 16:41:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:41:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:41:54,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:41:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97253202] [2022-04-06 16:41:54,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:41:54,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:41:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:41:54,339 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 16:41:54,340 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 16:41:54,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:41:54,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:41:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 16:41:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:41:55,180 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:55,183 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:55,185 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:55,189 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:55,190 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 16:41:55,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:41:56,895 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:41:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:59,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221064969] [2022-04-06 16:41:59,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:59,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97253202] [2022-04-06 16:41:59,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97253202] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:41:59,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:41:59,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:41:59,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:59,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630404766] [2022-04-06 16:41:59,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630404766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:59,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:59,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:41:59,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736861467] [2022-04-06 16:41:59,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:59,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:41:59,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:41:59,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-04-06 16:41:59,903 INFO L87 Difference]: Start difference. First operand 330 states and 456 transitions. Second operand has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:42:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:03,809 INFO L93 Difference]: Finished difference Result 418 states and 579 transitions. [2022-04-06 16:42:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:42:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2022-04-06 16:42:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:03,811 INFO L225 Difference]: With dead ends: 418 [2022-04-06 16:42:03,811 INFO L226 Difference]: Without dead ends: 415 [2022-04-06 16:42:03,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 16:42:03,812 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 66 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:03,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 412 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 16:42:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-06 16:42:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 395. [2022-04-06 16:42:03,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 225 states have (on average 1.2044444444444444) internal successors, (271), 226 states have internal predecessors, (271), 143 states have call successors, (143), 27 states have call predecessors, (143), 26 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-04-06 16:42:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2022-04-06 16:42:03,872 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 91 [2022-04-06 16:42:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:03,872 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2022-04-06 16:42:03,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 16:42:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2022-04-06 16:42:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 16:42:03,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:03,873 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:03,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:04,087 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,SelfDestructingSolverStorable15 [2022-04-06 16:42:04,087 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 7 times [2022-04-06 16:42:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:04,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2011177048] [2022-04-06 16:42:04,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:04,088 INFO L85 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 8 times [2022-04-06 16:42:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:04,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210550380] [2022-04-06 16:42:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:04,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:04,094 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:04,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058532820] [2022-04-06 16:42:04,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:42:04,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:04,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:04,097 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 16:42:04,098 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 16:42:04,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:42:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:04,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 16:42:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:04,472 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:04,829 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 26 proven. 92 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-04-06 16:42:04,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 16:42:05,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210550380] [2022-04-06 16:42:05,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:05,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058532820] [2022-04-06 16:42:05,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058532820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:42:05,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:42:05,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-04-06 16:42:05,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2011177048] [2022-04-06 16:42:05,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2011177048] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:05,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:05,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:42:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546381482] [2022-04-06 16:42:05,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:05,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:42:05,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:42:05,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:42:05,438 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-06 16:42:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:06,265 INFO L93 Difference]: Finished difference Result 470 states and 646 transitions. [2022-04-06 16:42:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:42:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 102 [2022-04-06 16:42:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:06,267 INFO L225 Difference]: With dead ends: 470 [2022-04-06 16:42:06,267 INFO L226 Difference]: Without dead ends: 468 [2022-04-06 16:42:06,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:42:06,268 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:06,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 447 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:42:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-04-06 16:42:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 407. [2022-04-06 16:42:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 234 states have (on average 1.1965811965811965) internal successors, (280), 235 states have internal predecessors, (280), 143 states have call successors, (143), 30 states have call predecessors, (143), 29 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2022-04-06 16:42:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 564 transitions. [2022-04-06 16:42:06,333 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 564 transitions. Word has length 102 [2022-04-06 16:42:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:06,334 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 564 transitions. [2022-04-06 16:42:06,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-04-06 16:42:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 564 transitions. [2022-04-06 16:42:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 16:42:06,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:06,336 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:06,355 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 16:42:06,543 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,SelfDestructingSolverStorable16 [2022-04-06 16:42:06,543 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 5 times [2022-04-06 16:42:06,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:06,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1072326387] [2022-04-06 16:42:06,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 6 times [2022-04-06 16:42:06,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:06,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676211407] [2022-04-06 16:42:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:06,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:06,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085368236] [2022-04-06 16:42:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:42:06,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:06,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:06,551 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 16:42:06,552 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 16:42:06,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:42:06,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:06,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 16:42:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:07,206 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:07,208 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 16:42:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:07,475 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:49,965 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:57,992 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 61 proven. 35 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-04-06 16:43:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676211407] [2022-04-06 16:43:05,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085368236] [2022-04-06 16:43:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085368236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:43:05,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:43:05,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-04-06 16:43:05,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1072326387] [2022-04-06 16:43:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1072326387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:05,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:05,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:43:05,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407031409] [2022-04-06 16:43:05,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:05,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:43:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:43:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:43:05,078 INFO L87 Difference]: Start difference. First operand 407 states and 564 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 16:43:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:05,602 INFO L93 Difference]: Finished difference Result 487 states and 674 transitions. [2022-04-06 16:43:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:43:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2022-04-06 16:43:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:05,605 INFO L225 Difference]: With dead ends: 487 [2022-04-06 16:43:05,605 INFO L226 Difference]: Without dead ends: 484 [2022-04-06 16:43:05,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:43:05,606 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 48 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:05,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 261 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:43:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-04-06 16:43:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 401. [2022-04-06 16:43:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 232 states have (on average 1.1939655172413792) internal successors, (277), 233 states have internal predecessors, (277), 139 states have call successors, (139), 30 states have call predecessors, (139), 29 states have return successors, (137), 137 states have call predecessors, (137), 137 states have call successors, (137) [2022-04-06 16:43:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 553 transitions. [2022-04-06 16:43:05,675 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 553 transitions. Word has length 108 [2022-04-06 16:43:05,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:05,676 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 553 transitions. [2022-04-06 16:43:05,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 16:43:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 553 transitions. [2022-04-06 16:43:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 16:43:05,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:05,677 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:05,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 16:43:05,908 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,SelfDestructingSolverStorable17 [2022-04-06 16:43:05,909 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:05,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 9 times [2022-04-06 16:43:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:05,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1296969712] [2022-04-06 16:43:05,910 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 10 times [2022-04-06 16:43:05,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:05,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607680624] [2022-04-06 16:43:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:05,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:05,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606298952] [2022-04-06 16:43:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:43:05,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:05,916 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 16:43:05,917 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 16:43:05,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:43:05,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 16:43:05,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 57 proven. 73 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-06 16:43:07,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 16:43:08,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607680624] [2022-04-06 16:43:08,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606298952] [2022-04-06 16:43:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606298952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:43:08,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:43:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2022-04-06 16:43:08,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1296969712] [2022-04-06 16:43:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1296969712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:08,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:43:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17716862] [2022-04-06 16:43:08,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:08,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:43:08,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:43:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:43:08,913 INFO L87 Difference]: Start difference. First operand 401 states and 553 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:43:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:10,396 INFO L93 Difference]: Finished difference Result 511 states and 701 transitions. [2022-04-06 16:43:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 16:43:10,397 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) Word has length 107 [2022-04-06 16:43:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:10,400 INFO L225 Difference]: With dead ends: 511 [2022-04-06 16:43:10,400 INFO L226 Difference]: Without dead ends: 509 [2022-04-06 16:43:10,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 16:43:10,401 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 87 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:10,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 504 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:43:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-04-06 16:43:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 487. [2022-04-06 16:43:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 282 states have (on average 1.1950354609929077) internal successors, (337), 283 states have internal predecessors, (337), 171 states have call successors, (171), 34 states have call predecessors, (171), 33 states have return successors, (169), 169 states have call predecessors, (169), 169 states have call successors, (169) [2022-04-06 16:43:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 677 transitions. [2022-04-06 16:43:10,510 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 677 transitions. Word has length 107 [2022-04-06 16:43:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:10,510 INFO L478 AbstractCegarLoop]: Abstraction has 487 states and 677 transitions. [2022-04-06 16:43:10,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 16:43:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 677 transitions. [2022-04-06 16:43:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 16:43:10,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:10,511 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:10,527 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 16:43:10,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:10,727 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 7 times [2022-04-06 16:43:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1876029775] [2022-04-06 16:43:10,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 8 times [2022-04-06 16:43:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776665132] [2022-04-06 16:43:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:10,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:10,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446863317] [2022-04-06 16:43:10,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:43:10,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:10,737 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 16:43:10,739 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 16:43:10,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:43:10,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 16:43:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:11,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:11,649 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 90 proven. 42 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 16:43:11,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:12,561 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776665132] [2022-04-06 16:43:13,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446863317] [2022-04-06 16:43:13,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446863317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:43:13,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:43:13,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:43:13,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:13,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1876029775] [2022-04-06 16:43:13,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1876029775] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:13,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:13,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:43:13,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860747429] [2022-04-06 16:43:13,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:13,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:43:13,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:43:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:43:13,249 INFO L87 Difference]: Start difference. First operand 487 states and 677 transitions. Second operand has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:43:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:16,106 INFO L93 Difference]: Finished difference Result 576 states and 800 transitions. [2022-04-06 16:43:16,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:43:16,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2022-04-06 16:43:16,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:16,108 INFO L225 Difference]: With dead ends: 576 [2022-04-06 16:43:16,108 INFO L226 Difference]: Without dead ends: 573 [2022-04-06 16:43:16,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:43:16,109 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 48 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:16,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 404 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 16:43:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-04-06 16:43:16,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 559. [2022-04-06 16:43:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 322 states have (on average 1.1987577639751552) internal successors, (386), 323 states have internal predecessors, (386), 199 states have call successors, (199), 38 states have call predecessors, (199), 37 states have return successors, (197), 197 states have call predecessors, (197), 197 states have call successors, (197) [2022-04-06 16:43:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 782 transitions. [2022-04-06 16:43:16,215 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 782 transitions. Word has length 111 [2022-04-06 16:43:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:16,215 INFO L478 AbstractCegarLoop]: Abstraction has 559 states and 782 transitions. [2022-04-06 16:43:16,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:43:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 782 transitions. [2022-04-06 16:43:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 16:43:16,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:16,216 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:16,234 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 16:43:16,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:16,431 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:16,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 9 times [2022-04-06 16:43:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [262531328] [2022-04-06 16:43:16,432 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 10 times [2022-04-06 16:43:16,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921399298] [2022-04-06 16:43:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:16,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:16,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341232541] [2022-04-06 16:43:16,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:43:16,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:16,440 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 16:43:16,441 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 16:43:16,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:43:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:16,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 16:43:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:17,522 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:17,528 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 16:43:19,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:22,574 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:23,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921399298] [2022-04-06 16:43:23,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:23,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341232541] [2022-04-06 16:43:23,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341232541] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:43:23,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:43:23,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-06 16:43:23,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:23,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [262531328] [2022-04-06 16:43:23,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [262531328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:23,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:23,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 16:43:23,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322542584] [2022-04-06 16:43:23,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:23,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 16:43:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 16:43:23,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:43:23,849 INFO L87 Difference]: Start difference. First operand 559 states and 782 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:43:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:27,402 INFO L93 Difference]: Finished difference Result 613 states and 851 transitions. [2022-04-06 16:43:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:43:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 113 [2022-04-06 16:43:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:27,405 INFO L225 Difference]: With dead ends: 613 [2022-04-06 16:43:27,405 INFO L226 Difference]: Without dead ends: 610 [2022-04-06 16:43:27,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 16:43:27,406 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 62 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:27,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 457 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1025 Invalid, 0 Unknown, 260 Unchecked, 1.1s Time] [2022-04-06 16:43:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-04-06 16:43:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 592. [2022-04-06 16:43:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 340 states have (on average 1.2) internal successors, (408), 341 states have internal predecessors, (408), 211 states have call successors, (211), 41 states have call predecessors, (211), 40 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-04-06 16:43:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 828 transitions. [2022-04-06 16:43:27,518 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 828 transitions. Word has length 113 [2022-04-06 16:43:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:27,518 INFO L478 AbstractCegarLoop]: Abstraction has 592 states and 828 transitions. [2022-04-06 16:43:27,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:43:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 828 transitions. [2022-04-06 16:43:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:43:27,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:27,520 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:27,538 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 16:43:27,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 16:43:27,727 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 11 times [2022-04-06 16:43:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157928440] [2022-04-06 16:43:27,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711081, now seen corresponding path program 12 times [2022-04-06 16:43:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627694] [2022-04-06 16:43:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:27,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:27,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014720086] [2022-04-06 16:43:27,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:43:27,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:27,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:27,735 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 16:43:27,736 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 16:43:27,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:43:27,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 16:43:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 16:43:28,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-04-06 16:43:33,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627694] [2022-04-06 16:43:33,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:33,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014720086] [2022-04-06 16:43:33,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014720086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:43:33,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:43:33,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2022-04-06 16:43:33,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:33,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157928440] [2022-04-06 16:43:33,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157928440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:33,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:33,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:43:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711925891] [2022-04-06 16:43:33,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:33,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:43:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:33,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:43:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:43:33,249 INFO L87 Difference]: Start difference. First operand 592 states and 828 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 16:43:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:34,951 INFO L93 Difference]: Finished difference Result 669 states and 922 transitions. [2022-04-06 16:43:34,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:43:34,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 116 [2022-04-06 16:43:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:34,954 INFO L225 Difference]: With dead ends: 669 [2022-04-06 16:43:34,954 INFO L226 Difference]: Without dead ends: 666 [2022-04-06 16:43:34,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 16:43:34,955 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 79 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:34,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 437 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:43:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-04-06 16:43:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 564. [2022-04-06 16:43:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 327 states have (on average 1.1926605504587156) internal successors, (390), 328 states have internal predecessors, (390), 195 states have call successors, (195), 42 states have call predecessors, (195), 41 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2022-04-06 16:43:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 778 transitions. [2022-04-06 16:43:35,067 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 778 transitions. Word has length 116 [2022-04-06 16:43:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:35,068 INFO L478 AbstractCegarLoop]: Abstraction has 564 states and 778 transitions. [2022-04-06 16:43:35,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 16:43:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 778 transitions. [2022-04-06 16:43:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:43:35,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:35,069 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:43:35,088 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 16:43:35,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:43:35,283 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 13 times [2022-04-06 16:43:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808133561] [2022-04-06 16:43:35,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1687072417, now seen corresponding path program 14 times [2022-04-06 16:43:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63094913] [2022-04-06 16:43:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:35,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919187618] [2022-04-06 16:43:35,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:43:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:35,292 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 16:43:35,305 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 16:43:35,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:43:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 16:43:35,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:36,291 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:36,292 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-04-06 16:43:46,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:48,449 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:52,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63094913] [2022-04-06 16:43:52,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919187618] [2022-04-06 16:43:52,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919187618] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:43:52,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:43:52,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 16:43:52,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:52,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808133561] [2022-04-06 16:43:52,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808133561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:52,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:52,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:43:52,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475675736] [2022-04-06 16:43:52,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:52,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:43:52,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:43:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:43:52,428 INFO L87 Difference]: Start difference. First operand 564 states and 778 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:44:01,640 WARN L232 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 65 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:44:03,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:05,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:44:06,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:06,302 INFO L93 Difference]: Finished difference Result 655 states and 904 transitions. [2022-04-06 16:44:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:44:06,303 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 116 [2022-04-06 16:44:06,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:06,305 INFO L225 Difference]: With dead ends: 655 [2022-04-06 16:44:06,305 INFO L226 Difference]: Without dead ends: 652 [2022-04-06 16:44:06,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 16:44:06,306 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:06,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 490 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1404 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-04-06 16:44:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-04-06 16:44:06,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 629. [2022-04-06 16:44:06,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 361 states have (on average 1.1994459833795015) internal successors, (433), 362 states have internal predecessors, (433), 223 states have call successors, (223), 45 states have call predecessors, (223), 44 states have return successors, (221), 221 states have call predecessors, (221), 221 states have call successors, (221) [2022-04-06 16:44:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 877 transitions. [2022-04-06 16:44:06,443 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 877 transitions. Word has length 116 [2022-04-06 16:44:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:06,443 INFO L478 AbstractCegarLoop]: Abstraction has 629 states and 877 transitions. [2022-04-06 16:44:06,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:44:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 877 transitions. [2022-04-06 16:44:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 16:44:06,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:06,445 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:06,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 16:44:06,658 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:06,658 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1416715037, now seen corresponding path program 1 times [2022-04-06 16:44:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:06,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479364066] [2022-04-06 16:44:06,659 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1416715037, now seen corresponding path program 2 times [2022-04-06 16:44:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:06,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323687946] [2022-04-06 16:44:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:06,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:06,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:06,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560909501] [2022-04-06 16:44:06,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:44:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:06,666 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 16:44:06,667 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 16:44:06,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:44:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 16:44:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 92 proven. 79 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-04-06 16:44:08,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 97 proven. 63 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-04-06 16:44:21,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323687946] [2022-04-06 16:44:21,387 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560909501] [2022-04-06 16:44:21,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560909501] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:44:21,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:44:21,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-04-06 16:44:21,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1479364066] [2022-04-06 16:44:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1479364066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:21,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:21,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:44:21,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183927604] [2022-04-06 16:44:21,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:21,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:44:21,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:44:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:44:21,389 INFO L87 Difference]: Start difference. First operand 629 states and 877 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:44:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:24,112 INFO L93 Difference]: Finished difference Result 694 states and 961 transitions. [2022-04-06 16:44:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:44:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 121 [2022-04-06 16:44:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:24,115 INFO L225 Difference]: With dead ends: 694 [2022-04-06 16:44:24,115 INFO L226 Difference]: Without dead ends: 692 [2022-04-06 16:44:24,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 16:44:24,116 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:24,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 375 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:44:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-04-06 16:44:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 669. [2022-04-06 16:44:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 383 states have (on average 1.2010443864229765) internal successors, (460), 384 states have internal predecessors, (460), 239 states have call successors, (239), 47 states have call predecessors, (239), 46 states have return successors, (237), 237 states have call predecessors, (237), 237 states have call successors, (237) [2022-04-06 16:44:24,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 936 transitions. [2022-04-06 16:44:24,264 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 936 transitions. Word has length 121 [2022-04-06 16:44:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:24,264 INFO L478 AbstractCegarLoop]: Abstraction has 669 states and 936 transitions. [2022-04-06 16:44:24,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:44:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 936 transitions. [2022-04-06 16:44:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 16:44:24,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:24,266 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:24,284 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 16:44:24,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:24,467 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 15 times [2022-04-06 16:44:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:24,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1037899160] [2022-04-06 16:44:24,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash 764235165, now seen corresponding path program 16 times [2022-04-06 16:44:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:24,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536688354] [2022-04-06 16:44:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:24,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:24,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045544014] [2022-04-06 16:44:24,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:44:24,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:24,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:24,479 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 16:44:24,480 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 16:44:24,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:44:24,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 16:44:24,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 113 proven. 70 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-04-06 16:44:26,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 16:44:28,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:28,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536688354] [2022-04-06 16:44:28,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045544014] [2022-04-06 16:44:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045544014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:44:28,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:44:28,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 35 [2022-04-06 16:44:28,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1037899160] [2022-04-06 16:44:28,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1037899160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:28,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:28,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 16:44:28,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406123259] [2022-04-06 16:44:28,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:28,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 16:44:28,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 16:44:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 16:44:28,424 INFO L87 Difference]: Start difference. First operand 669 states and 936 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:44:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:30,158 INFO L93 Difference]: Finished difference Result 777 states and 1076 transitions. [2022-04-06 16:44:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 16:44:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 121 [2022-04-06 16:44:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:30,162 INFO L225 Difference]: With dead ends: 777 [2022-04-06 16:44:30,162 INFO L226 Difference]: Without dead ends: 774 [2022-04-06 16:44:30,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 16:44:30,163 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 132 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:30,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 437 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1692 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:44:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-04-06 16:44:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 663. [2022-04-06 16:44:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 379 states have (on average 1.200527704485488) internal successors, (455), 380 states have internal predecessors, (455), 235 states have call successors, (235), 49 states have call predecessors, (235), 48 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2022-04-06 16:44:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 923 transitions. [2022-04-06 16:44:30,324 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 923 transitions. Word has length 121 [2022-04-06 16:44:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:30,324 INFO L478 AbstractCegarLoop]: Abstraction has 663 states and 923 transitions. [2022-04-06 16:44:30,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 16:44:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 923 transitions. [2022-04-06 16:44:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 16:44:30,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:30,326 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:30,343 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 16:44:30,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 16:44:30,543 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 3 times [2022-04-06 16:44:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:30,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945203389] [2022-04-06 16:44:30,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash 65157230, now seen corresponding path program 4 times [2022-04-06 16:44:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:30,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487878821] [2022-04-06 16:44:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:30,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:30,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110853296] [2022-04-06 16:44:30,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:44:30,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:30,551 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 16:44:30,552 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 16:44:30,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:44:30,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 16:44:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:31,657 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 88 proven. 119 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 16:44:31,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:32,619 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:35,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:35,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487878821] [2022-04-06 16:44:35,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:35,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110853296] [2022-04-06 16:44:35,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110853296] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:44:35,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:44:35,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 16:44:35,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945203389] [2022-04-06 16:44:35,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945203389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:35,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:35,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:44:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060051888] [2022-04-06 16:44:35,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:35,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:44:35,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:35,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:44:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=608, Unknown=1, NotChecked=0, Total=756 [2022-04-06 16:44:35,407 INFO L87 Difference]: Start difference. First operand 663 states and 923 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:44:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:36,914 INFO L93 Difference]: Finished difference Result 697 states and 955 transitions. [2022-04-06 16:44:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:44:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 124 [2022-04-06 16:44:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:36,917 INFO L225 Difference]: With dead ends: 697 [2022-04-06 16:44:36,918 INFO L226 Difference]: Without dead ends: 695 [2022-04-06 16:44:36,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=194, Invalid=861, Unknown=1, NotChecked=0, Total=1056 [2022-04-06 16:44:36,918 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 76 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:36,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 442 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 16:44:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-04-06 16:44:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 671. [2022-04-06 16:44:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 385 states have (on average 1.1974025974025975) internal successors, (461), 386 states have internal predecessors, (461), 235 states have call successors, (235), 51 states have call predecessors, (235), 50 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2022-04-06 16:44:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 929 transitions. [2022-04-06 16:44:37,087 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 929 transitions. Word has length 124 [2022-04-06 16:44:37,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:37,088 INFO L478 AbstractCegarLoop]: Abstraction has 671 states and 929 transitions. [2022-04-06 16:44:37,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:44:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 929 transitions. [2022-04-06 16:44:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 16:44:37,089 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:37,089 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:37,107 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 16:44:37,306 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,SelfDestructingSolverStorable25 [2022-04-06 16:44:37,306 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 5 times [2022-04-06 16:44:37,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:37,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89734129] [2022-04-06 16:44:37,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1339589678, now seen corresponding path program 6 times [2022-04-06 16:44:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:37,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592412088] [2022-04-06 16:44:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:37,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:37,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565666918] [2022-04-06 16:44:37,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:44:37,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:37,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:37,316 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 16:44:37,317 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 16:44:37,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:44:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:37,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 16:44:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2022-04-06 16:44:37,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:37,951 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592412088] [2022-04-06 16:44:39,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565666918] [2022-04-06 16:44:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565666918] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:44:39,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:44:39,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 16:44:39,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:39,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89734129] [2022-04-06 16:44:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89734129] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:39,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:39,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:44:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643179727] [2022-04-06 16:44:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:39,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:44:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:44:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:44:39,933 INFO L87 Difference]: Start difference. First operand 671 states and 929 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 16:44:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:40,984 INFO L93 Difference]: Finished difference Result 860 states and 1196 transitions. [2022-04-06 16:44:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:44:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 124 [2022-04-06 16:44:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:40,988 INFO L225 Difference]: With dead ends: 860 [2022-04-06 16:44:40,988 INFO L226 Difference]: Without dead ends: 858 [2022-04-06 16:44:40,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:44:40,989 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 72 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:40,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 389 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:44:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-04-06 16:44:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 821. [2022-04-06 16:44:41,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 472 states have (on average 1.1991525423728813) internal successors, (566), 473 states have internal predecessors, (566), 291 states have call successors, (291), 58 states have call predecessors, (291), 57 states have return successors, (289), 289 states have call predecessors, (289), 289 states have call successors, (289) [2022-04-06 16:44:41,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1146 transitions. [2022-04-06 16:44:41,232 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1146 transitions. Word has length 124 [2022-04-06 16:44:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:41,232 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 1146 transitions. [2022-04-06 16:44:41,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 16:44:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1146 transitions. [2022-04-06 16:44:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 16:44:41,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:41,233 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:41,250 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 16:44:41,447 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,SelfDestructingSolverStorable26 [2022-04-06 16:44:41,447 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 7 times [2022-04-06 16:44:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:41,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510669937] [2022-04-06 16:44:41,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -590650772, now seen corresponding path program 8 times [2022-04-06 16:44:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:41,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709533051] [2022-04-06 16:44:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:41,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607079578] [2022-04-06 16:44:41,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:44:41,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:41,454 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 16:44:41,457 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 16:44:41,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:44:41,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 16:44:41,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 72 proven. 93 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-04-06 16:44:42,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:42,674 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709533051] [2022-04-06 16:44:44,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607079578] [2022-04-06 16:44:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607079578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:44:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:44:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-06 16:44:44,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510669937] [2022-04-06 16:44:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510669937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:44,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:44,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 16:44:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635394668] [2022-04-06 16:44:44,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:44,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 16:44:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 16:44:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:44:44,619 INFO L87 Difference]: Start difference. First operand 821 states and 1146 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 16:44:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:46,645 INFO L93 Difference]: Finished difference Result 937 states and 1298 transitions. [2022-04-06 16:44:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:44:46,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 129 [2022-04-06 16:44:46,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:46,649 INFO L225 Difference]: With dead ends: 937 [2022-04-06 16:44:46,649 INFO L226 Difference]: Without dead ends: 935 [2022-04-06 16:44:46,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 16:44:46,649 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 97 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:46,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 564 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 16:44:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-04-06 16:44:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 912. [2022-04-06 16:44:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 525 states have (on average 1.198095238095238) internal successors, (629), 526 states have internal predecessors, (629), 323 states have call successors, (323), 64 states have call predecessors, (323), 63 states have return successors, (321), 321 states have call predecessors, (321), 321 states have call successors, (321) [2022-04-06 16:44:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1273 transitions. [2022-04-06 16:44:46,930 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1273 transitions. Word has length 129 [2022-04-06 16:44:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:46,930 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1273 transitions. [2022-04-06 16:44:46,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 16:44:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1273 transitions. [2022-04-06 16:44:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 16:44:46,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:46,932 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:46,948 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 16:44:47,148 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,SelfDestructingSolverStorable27 [2022-04-06 16:44:47,148 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 17 times [2022-04-06 16:44:47,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:47,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91461112] [2022-04-06 16:44:47,149 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:47,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1469141304, now seen corresponding path program 18 times [2022-04-06 16:44:47,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:47,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363996704] [2022-04-06 16:44:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:47,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:47,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:47,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191624561] [2022-04-06 16:44:47,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:44:47,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:47,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:47,157 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 16:44:47,159 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 16:44:47,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:44:47,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:47,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 16:44:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-04-06 16:44:47,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 16:44:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:47,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363996704] [2022-04-06 16:44:47,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:47,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191624561] [2022-04-06 16:44:47,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191624561] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:44:47,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:44:47,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-06 16:44:47,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:47,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91461112] [2022-04-06 16:44:47,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91461112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:47,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:47,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:44:47,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632998124] [2022-04-06 16:44:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:47,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:44:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:44:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:44:47,595 INFO L87 Difference]: Start difference. First operand 912 states and 1273 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-04-06 16:44:48,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:48,133 INFO L93 Difference]: Finished difference Result 1668 states and 2427 transitions. [2022-04-06 16:44:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:44:48,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 133 [2022-04-06 16:44:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:48,138 INFO L225 Difference]: With dead ends: 1668 [2022-04-06 16:44:48,138 INFO L226 Difference]: Without dead ends: 1214 [2022-04-06 16:44:48,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:44:48,140 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 9 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:48,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 209 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:44:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-04-06 16:44:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1150. [2022-04-06 16:44:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 635 states have (on average 1.220472440944882) internal successors, (775), 651 states have internal predecessors, (775), 451 states have call successors, (451), 64 states have call predecessors, (451), 63 states have return successors, (449), 434 states have call predecessors, (449), 449 states have call successors, (449) [2022-04-06 16:44:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1675 transitions. [2022-04-06 16:44:48,521 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1675 transitions. Word has length 133 [2022-04-06 16:44:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:48,521 INFO L478 AbstractCegarLoop]: Abstraction has 1150 states and 1675 transitions. [2022-04-06 16:44:48,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 5 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-04-06 16:44:48,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1675 transitions. [2022-04-06 16:44:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 16:44:48,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:48,523 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:48,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 16:44:48,739 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,SelfDestructingSolverStorable28 [2022-04-06 16:44:48,739 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 19 times [2022-04-06 16:44:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:48,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514192101] [2022-04-06 16:44:48,740 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -914829018, now seen corresponding path program 20 times [2022-04-06 16:44:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:48,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168637232] [2022-04-06 16:44:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:48,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:48,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241741224] [2022-04-06 16:44:48,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:44:48,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:48,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:48,746 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 16:44:48,747 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 16:44:48,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:44:48,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:48,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 16:44:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 133 proven. 88 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:44:49,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:44:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 134 proven. 60 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 16:44:51,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:44:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168637232] [2022-04-06 16:44:51,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:44:51,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241741224] [2022-04-06 16:44:51,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241741224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:44:51,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:44:51,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-04-06 16:44:51,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:44:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514192101] [2022-04-06 16:44:51,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514192101] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:44:51,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:44:51,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:44:51,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166634598] [2022-04-06 16:44:51,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:44:51,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:44:51,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:51,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:44:51,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:44:51,912 INFO L87 Difference]: Start difference. First operand 1150 states and 1675 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:44:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:44:52,958 INFO L93 Difference]: Finished difference Result 1267 states and 1845 transitions. [2022-04-06 16:44:52,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:44:52,959 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-04-06 16:44:52,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:44:52,963 INFO L225 Difference]: With dead ends: 1267 [2022-04-06 16:44:52,963 INFO L226 Difference]: Without dead ends: 1264 [2022-04-06 16:44:52,964 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 16:44:52,964 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 60 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:44:52,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 358 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:44:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-04-06 16:44:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1250. [2022-04-06 16:44:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 688 states have (on average 1.2223837209302326) internal successors, (841), 705 states have internal predecessors, (841), 493 states have call successors, (493), 69 states have call predecessors, (493), 68 states have return successors, (491), 475 states have call predecessors, (491), 491 states have call successors, (491) [2022-04-06 16:44:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1825 transitions. [2022-04-06 16:44:53,399 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1825 transitions. Word has length 133 [2022-04-06 16:44:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:44:53,399 INFO L478 AbstractCegarLoop]: Abstraction has 1250 states and 1825 transitions. [2022-04-06 16:44:53,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:44:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1825 transitions. [2022-04-06 16:44:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 16:44:53,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:44:53,401 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:44:53,419 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 16:44:53,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:53,617 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:44:53,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:44:53,618 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 21 times [2022-04-06 16:44:53,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:44:53,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817945563] [2022-04-06 16:44:53,618 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:44:53,618 INFO L85 PathProgramCache]: Analyzing trace with hash -112069451, now seen corresponding path program 22 times [2022-04-06 16:44:53,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:44:53,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534294432] [2022-04-06 16:44:53,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:44:53,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:44:53,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:44:53,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873048563] [2022-04-06 16:44:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:44:53,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:44:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:44:53,626 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 16:44:53,626 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 16:44:53,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:44:53,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:44:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 16:44:53,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:44:55,173 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:55,175 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:55,181 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:55,183 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:55,189 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:44:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 116 proven. 82 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 16:44:56,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:45:02,480 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:45:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534294432] [2022-04-06 16:45:03,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:45:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873048563] [2022-04-06 16:45:03,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873048563] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:45:03,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:45:03,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 16:45:03,007 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:45:03,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817945563] [2022-04-06 16:45:03,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817945563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:45:03,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:45:03,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:45:03,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123196162] [2022-04-06 16:45:03,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:45:03,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:45:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:45:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:45:03,008 INFO L87 Difference]: Start difference. First operand 1250 states and 1825 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:45:10,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:45:10,207 INFO L93 Difference]: Finished difference Result 1376 states and 2006 transitions. [2022-04-06 16:45:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 16:45:10,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 135 [2022-04-06 16:45:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:45:10,213 INFO L225 Difference]: With dead ends: 1376 [2022-04-06 16:45:10,213 INFO L226 Difference]: Without dead ends: 1373 [2022-04-06 16:45:10,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:45:10,214 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 68 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:45:10,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 513 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 16:45:10,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2022-04-06 16:45:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1347. [2022-04-06 16:45:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 738 states have (on average 1.2249322493224932) internal successors, (904), 756 states have internal predecessors, (904), 535 states have call successors, (535), 74 states have call predecessors, (535), 73 states have return successors, (533), 516 states have call predecessors, (533), 533 states have call successors, (533) [2022-04-06 16:45:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1972 transitions. [2022-04-06 16:45:10,660 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1972 transitions. Word has length 135 [2022-04-06 16:45:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:45:10,661 INFO L478 AbstractCegarLoop]: Abstraction has 1347 states and 1972 transitions. [2022-04-06 16:45:10,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:45:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1972 transitions. [2022-04-06 16:45:10,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 16:45:10,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:45:10,662 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:45:10,681 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 16:45:10,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 16:45:10,875 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:45:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:45:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -16499977, now seen corresponding path program 11 times [2022-04-06 16:45:10,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:10,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818043642] [2022-04-06 16:45:10,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:45:10,876 INFO L85 PathProgramCache]: Analyzing trace with hash -16499977, now seen corresponding path program 12 times [2022-04-06 16:45:10,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:45:10,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425653022] [2022-04-06 16:45:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:45:10,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:45:10,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:45:10,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454371112] [2022-04-06 16:45:10,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:45:10,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:45:10,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:45:10,882 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 16:45:10,883 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 16:45:10,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:45:10,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:45:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:45:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:45:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-04-06 16:45:11,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:45:11,321 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:45:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425653022] [2022-04-06 16:45:13,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:45:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454371112] [2022-04-06 16:45:13,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454371112] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:45:13,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:45:13,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 16:45:13,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:45:13,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818043642] [2022-04-06 16:45:13,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818043642] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:45:13,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:45:13,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:45:13,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914999512] [2022-04-06 16:45:13,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:45:13,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:45:13,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:13,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:45:13,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:45:13,142 INFO L87 Difference]: Start difference. First operand 1347 states and 1972 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 16:45:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:45:14,173 INFO L93 Difference]: Finished difference Result 1406 states and 2032 transitions. [2022-04-06 16:45:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:45:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) Word has length 132 [2022-04-06 16:45:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:45:14,178 INFO L225 Difference]: With dead ends: 1406 [2022-04-06 16:45:14,179 INFO L226 Difference]: Without dead ends: 1404 [2022-04-06 16:45:14,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-04-06 16:45:14,179 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:45:14,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 233 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:45:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-04-06 16:45:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1375. [2022-04-06 16:45:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 759 states have (on average 1.2187088274044795) internal successors, (925), 779 states have internal predecessors, (925), 539 states have call successors, (539), 77 states have call predecessors, (539), 76 states have return successors, (537), 518 states have call predecessors, (537), 537 states have call successors, (537) [2022-04-06 16:45:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2001 transitions. [2022-04-06 16:45:14,663 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2001 transitions. Word has length 132 [2022-04-06 16:45:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:45:14,663 INFO L478 AbstractCegarLoop]: Abstraction has 1375 states and 2001 transitions. [2022-04-06 16:45:14,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 16:45:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2001 transitions. [2022-04-06 16:45:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:45:14,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:45:14,665 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:45:14,681 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 16:45:14,881 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:45:14,881 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:45:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:45:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 23 times [2022-04-06 16:45:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157391164] [2022-04-06 16:45:14,882 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:45:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash -2035738456, now seen corresponding path program 24 times [2022-04-06 16:45:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:45:14,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517567020] [2022-04-06 16:45:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:45:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:45:14,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:45:14,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555415539] [2022-04-06 16:45:14,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:45:14,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:45:14,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:45:14,888 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 16:45:14,888 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 16:45:14,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 16:45:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:45:14,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 16:45:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:45:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 86 proven. 119 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 16:45:16,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:45:18,808 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:18,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:18,812 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:24,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:45:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517567020] [2022-04-06 16:45:24,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:45:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555415539] [2022-04-06 16:45:24,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555415539] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:45:24,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:45:24,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 16:45:24,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:45:24,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157391164] [2022-04-06 16:45:24,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157391164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:45:24,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:45:24,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:45:24,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497089604] [2022-04-06 16:45:24,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:45:24,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:45:24,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:24,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:45:24,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=892, Unknown=1, NotChecked=0, Total=1056 [2022-04-06 16:45:24,144 INFO L87 Difference]: Start difference. First operand 1375 states and 2001 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:45:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:45:25,958 INFO L93 Difference]: Finished difference Result 1400 states and 2028 transitions. [2022-04-06 16:45:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:45:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-04-06 16:45:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:45:25,972 INFO L225 Difference]: With dead ends: 1400 [2022-04-06 16:45:25,972 INFO L226 Difference]: Without dead ends: 1393 [2022-04-06 16:45:25,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=193, Invalid=1138, Unknown=1, NotChecked=0, Total=1332 [2022-04-06 16:45:25,973 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 64 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:45:25,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 416 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1034 Invalid, 0 Unknown, 238 Unchecked, 1.2s Time] [2022-04-06 16:45:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-04-06 16:45:26,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1381. [2022-04-06 16:45:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 765 states have (on average 1.2169934640522875) internal successors, (931), 785 states have internal predecessors, (931), 539 states have call successors, (539), 77 states have call predecessors, (539), 76 states have return successors, (537), 518 states have call predecessors, (537), 537 states have call successors, (537) [2022-04-06 16:45:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2007 transitions. [2022-04-06 16:45:26,457 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2007 transitions. Word has length 138 [2022-04-06 16:45:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:45:26,457 INFO L478 AbstractCegarLoop]: Abstraction has 1381 states and 2007 transitions. [2022-04-06 16:45:26,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:45:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2007 transitions. [2022-04-06 16:45:26,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:45:26,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:45:26,459 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:45:26,481 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 16:45:26,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:45:26,671 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:45:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:45:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 25 times [2022-04-06 16:45:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:45:26,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575868172] [2022-04-06 16:45:26,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:45:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 26 times [2022-04-06 16:45:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:45:26,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548488932] [2022-04-06 16:45:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:45:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:45:26,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:45:26,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287172157] [2022-04-06 16:45:26,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:45:26,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:45:26,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:45:26,678 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 16:45:26,679 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 16:45:26,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:45:26,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:45:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 16:45:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:45:27,728 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:27,731 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:27,732 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:45:46,329 WARN L232 SmtUtils]: Spent 18.26s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:46:30,564 WARN L232 SmtUtils]: Spent 21.44s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:46:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 163 proven. 69 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:46:38,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:46:56,402 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:46:56,403 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:47:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548488932] [2022-04-06 16:47:05,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:47:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287172157] [2022-04-06 16:47:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287172157] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:47:05,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:47:05,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 16:47:05,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:47:05,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575868172] [2022-04-06 16:47:05,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575868172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:47:05,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:47:05,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 16:47:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592347944] [2022-04-06 16:47:05,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:47:05,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 16:47:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:47:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 16:47:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=796, Unknown=11, NotChecked=0, Total=930 [2022-04-06 16:47:05,078 INFO L87 Difference]: Start difference. First operand 1381 states and 2007 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:47:12,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:47:15,928 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse32 (div (+ (* (- 1) c_main_~s~0) 1) 4))) (let ((.cse24 (div .cse32 c_main_~r~0)) (.cse25 (* c_main_~r~0 c_main_~y~0 0)) (.cse29 (div (div (* (- 1) c_main_~q~0) 4) c_main_~p~0)) (.cse1 (* c_main_~r~0 c_main_~y~0)) (.cse0 (* c_main_~p~0 c_main_~x~0))) (let ((.cse2 (= c_main_~p~0 0)) (.cse22 (+ (* 2 .cse1) (* 2 .cse0))) (.cse26 (* c_main_~p~0 c_main_~x~0 0)) (.cse30 (* .cse29 c_main_~r~0 c_main_~y~0)) (.cse28 (div (- c_main_~q~0) 4)) (.cse31 (* 2 .cse25)) (.cse7 (* c_main_~s~0 c_main_~y~0)) (.cse23 (* .cse24 c_main_~r~0 c_main_~y~0)) (.cse21 (= c_main_~r~0 0))) (let ((.cse5 (* c_main_~p~0 (- 4) c_main_~x~0)) (.cse6 (* (- 4) c_main_~r~0 c_main_~y~0)) (.cse8 (= .cse32 0)) (.cse4 (= 0 (mod (+ (* c_main_~s~0 3) 1) 4))) (.cse9 (= (mod .cse32 c_main_~r~0) 0)) (.cse12 (not .cse21)) (.cse10 (+ .cse31 .cse7 (* .cse23 4))) (.cse13 (= .cse28 0)) (.cse14 (+ .cse31 (* .cse30 4) .cse7)) (.cse15 (= .cse22 (+ (* (* .cse29 c_main_~p~0 c_main_~x~0) 2) .cse25 .cse26 (* 2 .cse30)))) (.cse16 (= (+ c_main_~s~0 (* 4 (* .cse29 c_main_~r~0))) 1)) (.cse3 (= (mod (* c_main_~q~0 3) 4) 0)) (.cse17 (not .cse2)) (.cse18 (= (mod .cse28 c_main_~p~0) 0)) (.cse19 (* .cse0 4)) (.cse20 (* .cse1 4))) (and (= (+ .cse0 .cse1 c_main_~y~0) c_main_~x~0) (let ((.cse11 (+ .cse19 .cse20))) (or (and .cse2 .cse3 (or (and .cse4 (= (mod (+ .cse5 .cse6 .cse7) 4) 0) .cse8 (= (+ .cse0 (div .cse7 (- 4)) .cse1) 0)) (and .cse4 .cse9 (= .cse10 .cse11) .cse12)) .cse13) (and (= .cse14 .cse11) .cse15 .cse16 .cse3 .cse17 .cse18))) (let ((.cse27 (+ c_main_~b~0 .cse19 .cse20))) (or (and .cse2 .cse3 (or (and .cse4 (= (mod (+ .cse5 .cse6 (* c_main_~b~0 3) .cse7) 4) 0) .cse21 (= (+ (div (+ (* (- 1) c_main_~b~0) .cse7) (- 4)) .cse0 .cse1) 0) .cse8) (and .cse4 .cse9 .cse12 (= .cse22 (+ (* .cse23 2) (* 2 (* .cse24 c_main_~p~0 c_main_~x~0)) .cse25 .cse26)) (= .cse27 .cse10))) .cse13) (and (= .cse27 .cse14) .cse15 .cse16 .cse3 .cse17 .cse18))) (= (+ .cse0 .cse1) c_main_~a~0)))))) is different from false [2022-04-06 16:47:19,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:47:21,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:47:22,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:47:25,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:47:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:47:25,751 INFO L93 Difference]: Finished difference Result 1447 states and 2096 transitions. [2022-04-06 16:47:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 16:47:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-04-06 16:47:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:47:25,757 INFO L225 Difference]: With dead ends: 1447 [2022-04-06 16:47:25,757 INFO L226 Difference]: Without dead ends: 1444 [2022-04-06 16:47:25,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=185, Invalid=1212, Unknown=13, NotChecked=72, Total=1482 [2022-04-06 16:47:25,758 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 72 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 84 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:47:25,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 510 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1529 Invalid, 4 Unknown, 14 Unchecked, 15.7s Time] [2022-04-06 16:47:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-04-06 16:47:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1431. [2022-04-06 16:47:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 794 states have (on average 1.2153652392947103) internal successors, (965), 815 states have internal predecessors, (965), 556 states have call successors, (556), 81 states have call predecessors, (556), 80 states have return successors, (554), 534 states have call predecessors, (554), 554 states have call successors, (554) [2022-04-06 16:47:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 2075 transitions. [2022-04-06 16:47:26,269 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 2075 transitions. Word has length 138 [2022-04-06 16:47:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:47:26,269 INFO L478 AbstractCegarLoop]: Abstraction has 1431 states and 2075 transitions. [2022-04-06 16:47:26,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:47:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 2075 transitions. [2022-04-06 16:47:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:47:26,271 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:47:26,271 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:47:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 16:47:26,487 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,SelfDestructingSolverStorable33 [2022-04-06 16:47:26,487 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:47:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:47:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 27 times [2022-04-06 16:47:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:47:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110778075] [2022-04-06 16:47:26,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:47:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1588704448, now seen corresponding path program 28 times [2022-04-06 16:47:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:47:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078991883] [2022-04-06 16:47:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:47:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:47:26,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:47:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537511079] [2022-04-06 16:47:26,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:47:26,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:47:26,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:47:26,503 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 16:47:26,503 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 16:47:26,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:47:26,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:47:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 16:47:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:47:27,067 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,333 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,335 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,336 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,341 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,342 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:28,344 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:47:49,755 WARN L232 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 128 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:48:24,919 WARN L232 SmtUtils]: Spent 17.45s on a formula simplification. DAG size of input: 113 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:48:39,616 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:48:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 132 proven. 121 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-04-06 16:48:40,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:48:54,205 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:02,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:49:02,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078991883] [2022-04-06 16:49:02,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:49:02,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537511079] [2022-04-06 16:49:02,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537511079] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:49:02,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:49:02,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-06 16:49:02,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:49:02,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110778075] [2022-04-06 16:49:02,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110778075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:49:02,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:49:02,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 16:49:02,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389227514] [2022-04-06 16:49:02,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:49:02,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 16:49:02,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:02,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 16:49:02,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=850, Unknown=4, NotChecked=0, Total=992 [2022-04-06 16:49:02,386 INFO L87 Difference]: Start difference. First operand 1431 states and 2075 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-06 16:49:12,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:49:33,575 WARN L232 SmtUtils]: Spent 17.10s on a formula simplification. DAG size of input: 135 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:49:38,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:49:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:49:48,287 INFO L93 Difference]: Finished difference Result 1591 states and 2307 transitions. [2022-04-06 16:49:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:49:48,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2022-04-06 16:49:48,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:49:48,295 INFO L225 Difference]: With dead ends: 1591 [2022-04-06 16:49:48,295 INFO L226 Difference]: Without dead ends: 1588 [2022-04-06 16:49:48,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 82.7s TimeCoverageRelationStatistics Valid=222, Invalid=1414, Unknown=4, NotChecked=0, Total=1640 [2022-04-06 16:49:48,296 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 89 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 94 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:49:48,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 538 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1753 Invalid, 1 Unknown, 0 Unchecked, 22.9s Time] [2022-04-06 16:49:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-04-06 16:49:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1498. [2022-04-06 16:49:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 831 states have (on average 1.2166064981949458) internal successors, (1011), 854 states have internal predecessors, (1011), 583 states have call successors, (583), 84 states have call predecessors, (583), 83 states have return successors, (581), 559 states have call predecessors, (581), 581 states have call successors, (581) [2022-04-06 16:49:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2175 transitions. [2022-04-06 16:49:48,847 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2175 transitions. Word has length 138 [2022-04-06 16:49:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:49:48,847 INFO L478 AbstractCegarLoop]: Abstraction has 1498 states and 2175 transitions. [2022-04-06 16:49:48,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-04-06 16:49:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2175 transitions. [2022-04-06 16:49:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 16:49:48,849 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:49:48,849 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:49:48,865 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 16:49:49,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 16:49:49,052 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:49:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:49:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 29 times [2022-04-06 16:49:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:49:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484377225] [2022-04-06 16:49:49,053 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:49:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 30 times [2022-04-06 16:49:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:49:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124500767] [2022-04-06 16:49:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:49:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:49:49,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:49:49,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774478907] [2022-04-06 16:49:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:49:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:49:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:49:49,059 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 16:49:49,060 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 16:49:49,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:49:49,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:49:49,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 16:49:49,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:49:50,640 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:50,642 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:49:50,643 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:50:14,102 WARN L232 SmtUtils]: Spent 15.36s on a formula simplification that was a NOOP. DAG size: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:50:45,871 WARN L232 SmtUtils]: Spent 17.09s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:50:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 103 proven. 139 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:50:49,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:51:06,318 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:51:06,319 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:51:12,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:51:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124500767] [2022-04-06 16:51:12,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:51:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774478907] [2022-04-06 16:51:12,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774478907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:51:12,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:51:12,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-06 16:51:12,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:51:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484377225] [2022-04-06 16:51:12,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484377225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:51:12,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:51:12,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:51:12,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562694232] [2022-04-06 16:51:12,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:51:12,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:51:12,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:51:12,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:51:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=853, Unknown=8, NotChecked=0, Total=992 [2022-04-06 16:51:12,694 INFO L87 Difference]: Start difference. First operand 1498 states and 2175 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:51:59,971 WARN L232 SmtUtils]: Spent 33.34s on a formula simplification. DAG size of input: 106 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:52:02,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:04,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:05,586 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:07,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:09,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:11,853 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:13,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:15,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:17,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:19,672 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:21,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:23,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:25,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:27,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:29,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:31,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:33,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:35,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:37,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:39,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:41,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:43,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:45,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:47,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:49,508 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:52,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:55,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 16:52:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:52:56,095 INFO L93 Difference]: Finished difference Result 1591 states and 2304 transitions. [2022-04-06 16:52:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:52:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 141 [2022-04-06 16:52:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:52:56,102 INFO L225 Difference]: With dead ends: 1591 [2022-04-06 16:52:56,102 INFO L226 Difference]: Without dead ends: 1584 [2022-04-06 16:52:56,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 99.1s TimeCoverageRelationStatistics Valid=178, Invalid=1294, Unknown=10, NotChecked=0, Total=1482 [2022-04-06 16:52:56,103 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 70 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 60 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:52:56,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 555 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1550 Invalid, 23 Unknown, 0 Unchecked, 60.0s Time] [2022-04-06 16:52:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2022-04-06 16:52:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1564. [2022-04-06 16:52:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 868 states have (on average 1.2165898617511521) internal successors, (1056), 891 states have internal predecessors, (1056), 609 states have call successors, (609), 87 states have call predecessors, (609), 86 states have return successors, (607), 585 states have call predecessors, (607), 607 states have call successors, (607) [2022-04-06 16:52:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2272 transitions. [2022-04-06 16:52:56,701 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2272 transitions. Word has length 141 [2022-04-06 16:52:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:52:56,701 INFO L478 AbstractCegarLoop]: Abstraction has 1564 states and 2272 transitions. [2022-04-06 16:52:56,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:52:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2272 transitions. [2022-04-06 16:52:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 16:52:56,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:52:56,703 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:52:56,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 16:52:56,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 16:52:56,919 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:52:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:52:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 31 times [2022-04-06 16:52:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:52:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1361836563] [2022-04-06 16:52:56,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:52:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 32 times [2022-04-06 16:52:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:52:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450189015] [2022-04-06 16:52:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:52:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:52:56,925 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:52:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497955831] [2022-04-06 16:52:56,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:52:56,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:52:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:52:56,926 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:52:56,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 16:52:56,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:52:56,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:52:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 16:52:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:53:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-04-06 16:53:00,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:53:01,686 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:53:04,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:53:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450189015] [2022-04-06 16:53:04,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:53:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497955831] [2022-04-06 16:53:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497955831] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:53:04,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:53:04,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-04-06 16:53:04,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:53:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1361836563] [2022-04-06 16:53:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1361836563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:53:04,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:53:04,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 16:53:04,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26255518] [2022-04-06 16:53:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:53:04,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 16:53:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:53:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 16:53:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-04-06 16:53:04,094 INFO L87 Difference]: Start difference. First operand 1564 states and 2272 transitions. Second operand has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:53:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:53:10,235 INFO L93 Difference]: Finished difference Result 1692 states and 2459 transitions. [2022-04-06 16:53:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 16:53:10,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 143 [2022-04-06 16:53:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:53:10,241 INFO L225 Difference]: With dead ends: 1692 [2022-04-06 16:53:10,241 INFO L226 Difference]: Without dead ends: 1689 [2022-04-06 16:53:10,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 16:53:10,242 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 89 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:53:10,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 624 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 16:53:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-04-06 16:53:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1657. [2022-04-06 16:53:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 915 states have (on average 1.219672131147541) internal successors, (1116), 939 states have internal predecessors, (1116), 651 states have call successors, (651), 91 states have call predecessors, (651), 90 states have return successors, (649), 626 states have call predecessors, (649), 649 states have call successors, (649) [2022-04-06 16:53:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2416 transitions. [2022-04-06 16:53:10,884 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2416 transitions. Word has length 143 [2022-04-06 16:53:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:53:10,884 INFO L478 AbstractCegarLoop]: Abstraction has 1657 states and 2416 transitions. [2022-04-06 16:53:10,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 16:53:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2416 transitions. [2022-04-06 16:53:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 16:53:10,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:53:10,886 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:53:10,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 16:53:11,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:53:11,094 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:53:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:53:11,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 33 times [2022-04-06 16:53:11,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:53:11,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458952646] [2022-04-06 16:53:11,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:53:11,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1701564030, now seen corresponding path program 34 times [2022-04-06 16:53:11,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:53:11,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326880089] [2022-04-06 16:53:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:53:11,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:53:11,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:53:11,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442005557] [2022-04-06 16:53:11,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:53:11,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:53:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:53:11,114 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:53:11,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 16:53:11,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:53:11,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:53:11,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 108 conjunts are in the unsatisfiable core [2022-04-06 16:53:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:53:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 147 proven. 122 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-04-06 16:53:12,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:53:13,026 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:53:15,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:53:15,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326880089] [2022-04-06 16:53:15,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:53:15,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442005557] [2022-04-06 16:53:15,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442005557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:53:15,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:53:15,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-06 16:53:15,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:53:15,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458952646] [2022-04-06 16:53:15,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458952646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:53:15,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:53:15,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 16:53:15,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94379333] [2022-04-06 16:53:15,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:53:15,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 16:53:15,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:53:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 16:53:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:53:15,626 INFO L87 Difference]: Start difference. First operand 1657 states and 2416 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:53:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:53:18,477 INFO L93 Difference]: Finished difference Result 1772 states and 2572 transitions. [2022-04-06 16:53:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 16:53:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 143 [2022-04-06 16:53:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:53:18,484 INFO L225 Difference]: With dead ends: 1772 [2022-04-06 16:53:18,484 INFO L226 Difference]: Without dead ends: 1769 [2022-04-06 16:53:18,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 16:53:18,485 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 94 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:53:18,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 664 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2351 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 16:53:18,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-04-06 16:53:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1675. [2022-04-06 16:53:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 928 states have (on average 1.2176724137931034) internal successors, (1130), 953 states have internal predecessors, (1130), 653 states have call successors, (653), 94 states have call predecessors, (653), 93 states have return successors, (651), 627 states have call predecessors, (651), 651 states have call successors, (651) [2022-04-06 16:53:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2434 transitions. [2022-04-06 16:53:19,124 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2434 transitions. Word has length 143 [2022-04-06 16:53:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:53:19,124 INFO L478 AbstractCegarLoop]: Abstraction has 1675 states and 2434 transitions. [2022-04-06 16:53:19,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:53:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2434 transitions. [2022-04-06 16:53:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:53:19,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:53:19,126 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:53:19,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 16:53:19,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 16:53:19,339 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:53:19,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:53:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1105634999, now seen corresponding path program 9 times [2022-04-06 16:53:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:53:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910751385] [2022-04-06 16:53:19,340 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:53:19,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1105634999, now seen corresponding path program 10 times [2022-04-06 16:53:19,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:53:19,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934101152] [2022-04-06 16:53:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:53:19,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:53:19,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:53:19,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954155538] [2022-04-06 16:53:19,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:53:19,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:53:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:53:19,347 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:53:19,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 16:53:19,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:53:19,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:53:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 16:53:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:53:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 185 proven. 114 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-04-06 16:53:20,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:53:41,598 WARN L855 $PredicateComparison]: unable to prove that (or (= (+ c_main_~c~0 (* (- 1) c_main_~v~0)) (let ((.cse0 (+ c_main_~d~0 c_main_~k~0))) (+ (* (+ (* (- 1) (* c_main_~s~0 .cse0)) c_main_~r~0) c_main_~y~0) (* (+ (* (- 1) c_main_~q~0 .cse0) c_main_~p~0) c_main_~x~0)))) (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (not (= (+ (* c_main_~b~0 c_main_~k~0) c_main_~c~0) c_main_~a~0)) (not (= c_main_~b~0 (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0)))) (<= (* 2 c_main_~v~0) c_main_~c~0)) is different from true [2022-04-06 16:53:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 228 proven. 10 refuted. 0 times theorem prover too weak. 438 trivial. 2 not checked. [2022-04-06 16:53:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:53:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934101152] [2022-04-06 16:53:58,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:53:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954155538] [2022-04-06 16:53:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954155538] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:53:58,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:53:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14] total 32 [2022-04-06 16:53:58,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:53:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910751385] [2022-04-06 16:53:58,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910751385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:53:58,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:53:58,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 16:53:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484790243] [2022-04-06 16:53:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:53:58,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 16:53:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:53:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 16:53:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=759, Unknown=1, NotChecked=58, Total=992 [2022-04-06 16:53:58,994 INFO L87 Difference]: Start difference. First operand 1675 states and 2434 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:54:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:54:00,717 INFO L93 Difference]: Finished difference Result 1761 states and 2554 transitions. [2022-04-06 16:54:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:54:00,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 146 [2022-04-06 16:54:00,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:54:00,730 INFO L225 Difference]: With dead ends: 1761 [2022-04-06 16:54:00,730 INFO L226 Difference]: Without dead ends: 1759 [2022-04-06 16:54:00,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 257 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=226, Invalid=1109, Unknown=1, NotChecked=70, Total=1406 [2022-04-06 16:54:00,732 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 98 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:54:00,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 396 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 16:54:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-04-06 16:54:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1676. [2022-04-06 16:54:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 928 states have (on average 1.2176724137931034) internal successors, (1130), 953 states have internal predecessors, (1130), 653 states have call successors, (653), 95 states have call predecessors, (653), 94 states have return successors, (651), 627 states have call predecessors, (651), 651 states have call successors, (651) [2022-04-06 16:54:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2434 transitions. [2022-04-06 16:54:01,400 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2434 transitions. Word has length 146 [2022-04-06 16:54:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:54:01,401 INFO L478 AbstractCegarLoop]: Abstraction has 1676 states and 2434 transitions. [2022-04-06 16:54:01,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 19 states have internal predecessors, (49), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:54:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2434 transitions. [2022-04-06 16:54:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:54:01,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:54:01,403 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:54:01,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 16:54:01,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 16:54:01,604 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:54:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:54:01,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 11 times [2022-04-06 16:54:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:54:01,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438526668] [2022-04-06 16:54:01,605 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:54:01,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1351700721, now seen corresponding path program 12 times [2022-04-06 16:54:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:54:01,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559121108] [2022-04-06 16:54:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:54:01,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:54:01,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:54:01,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582121146] [2022-04-06 16:54:01,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:54:01,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:54:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:54:01,611 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:54:01,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 16:54:02,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:54:02,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:54:02,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 16:54:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:54:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 90 proven. 62 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2022-04-06 16:54:40,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:54:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:54:44,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559121108] [2022-04-06 16:54:44,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:54:44,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582121146] [2022-04-06 16:54:44,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582121146] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:54:44,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:54:44,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 16:54:44,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:54:44,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438526668] [2022-04-06 16:54:44,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438526668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:54:44,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:54:44,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 16:54:44,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316312542] [2022-04-06 16:54:44,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:54:44,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 16:54:44,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:54:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 16:54:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:54:44,552 INFO L87 Difference]: Start difference. First operand 1676 states and 2434 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 16:55:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:55:13,174 INFO L93 Difference]: Finished difference Result 1845 states and 2687 transitions. [2022-04-06 16:55:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:55:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 146 [2022-04-06 16:55:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:55:13,181 INFO L225 Difference]: With dead ends: 1845 [2022-04-06 16:55:13,181 INFO L226 Difference]: Without dead ends: 1843 [2022-04-06 16:55:13,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 16:55:13,183 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 87 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:55:13,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 470 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-04-06 16:55:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-04-06 16:55:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1759. [2022-04-06 16:55:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 970 states have (on average 1.2216494845360826) internal successors, (1185), 996 states have internal predecessors, (1185), 691 states have call successors, (691), 98 states have call predecessors, (691), 97 states have return successors, (689), 664 states have call predecessors, (689), 689 states have call successors, (689) [2022-04-06 16:55:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 2565 transitions. [2022-04-06 16:55:13,900 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 2565 transitions. Word has length 146 [2022-04-06 16:55:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:55:13,900 INFO L478 AbstractCegarLoop]: Abstraction has 1759 states and 2565 transitions. [2022-04-06 16:55:13,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 5 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 16:55:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 2565 transitions. [2022-04-06 16:55:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 16:55:13,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:13,902 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:13,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 16:55:14,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 16:55:14,103 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 35 times [2022-04-06 16:55:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:14,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954061171] [2022-04-06 16:55:14,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:55:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash -780316161, now seen corresponding path program 36 times [2022-04-06 16:55:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442243719] [2022-04-06 16:55:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:14,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:14,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700283171] [2022-04-06 16:55:14,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:55:14,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:14,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:14,110 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:55:14,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 16:55:14,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 16:55:14,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 16:55:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 53 proven. 147 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 16:55:20,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:55:29,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:55:29,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442243719] [2022-04-06 16:55:29,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:55:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700283171] [2022-04-06 16:55:29,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700283171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:55:29,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:55:29,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-04-06 16:55:29,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:55:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954061171] [2022-04-06 16:55:29,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954061171] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:29,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:29,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 16:55:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677417363] [2022-04-06 16:55:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:55:29,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 16:55:29,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:29,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 16:55:29,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=945, Unknown=1, NotChecked=0, Total=1056 [2022-04-06 16:55:29,860 INFO L87 Difference]: Start difference. First operand 1759 states and 2565 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-04-06 16:55:52,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []