/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/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:31:53,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:31:53,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:31:53,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:31:53,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:31:53,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:31:53,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:31:53,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:31:53,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:31:53,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:31:53,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:31:53,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:31:53,130 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:31:53,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:31:53,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:31:53,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:31:53,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:31:53,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:31:53,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:31:53,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:31:53,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:31:53,146 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 16:31:53,153 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:31:53,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:31:53,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:31:53,154 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:31:53,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:31:53,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:31:53,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:31:53,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:31:53,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:31:53,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:31:53,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:31:53,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:31:53,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:31:53,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:31:53,156 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:31:53,157 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:31:53,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:31:53,157 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:31:53,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:31:53,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:31:53,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:31:53,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:31:53,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:31:53,331 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:31:53,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-04-06 16:31:53,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75677da59/2002ded962f7466098a2275d2c514529/FLAG2eb9a8160 [2022-04-06 16:31:53,710 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:31:53,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2022-04-06 16:31:53,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75677da59/2002ded962f7466098a2275d2c514529/FLAG2eb9a8160 [2022-04-06 16:31:54,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75677da59/2002ded962f7466098a2275d2c514529 [2022-04-06 16:31:54,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:31:54,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:31:54,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:31:54,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:31:54,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:31:54,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91d4854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54, skipping insertion in model container [2022-04-06 16:31:54,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:31:54,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:31:54,295 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/egcd2-ll_valuebound10.c[490,503] [2022-04-06 16:31:54,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:31:54,313 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:31:54,320 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/egcd2-ll_valuebound10.c[490,503] [2022-04-06 16:31:54,327 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:31:54,337 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:31:54,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54 WrapperNode [2022-04-06 16:31:54,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:31:54,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:31:54,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:31:54,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:31:54,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:31:54,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:31:54,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:31:54,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:31:54,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (1/1) ... [2022-04-06 16:31:54,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:31:54,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:54,393 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 16:31:54,414 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 16:31:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:31:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:31:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:31:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:31:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:31:54,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:31:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:31:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:31:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:31:54,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:31:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:31:54,432 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:31:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:31:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:31:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:31:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:31:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:31:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:31:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:31:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:31:54,479 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:31:54,480 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:31:54,581 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:31:54,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:31:54,585 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 16:31:54,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:31:54 BoogieIcfgContainer [2022-04-06 16:31:54,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:31:54,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:31:54,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:31:54,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:31:54,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:31:54" (1/3) ... [2022-04-06 16:31:54,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1280b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:31:54, skipping insertion in model container [2022-04-06 16:31:54,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:31:54" (2/3) ... [2022-04-06 16:31:54,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1280b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:31:54, skipping insertion in model container [2022-04-06 16:31:54,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:31:54" (3/3) ... [2022-04-06 16:31:54,591 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2022-04-06 16:31:54,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:31:54,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:31:54,623 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:31:54,629 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 16:31:54,629 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:31:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 16:31:54,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:31:54,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:54,645 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:54,659 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:54,670 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-04-06 16:31:54,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:54,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764874019] [2022-04-06 16:31:54,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-04-06 16:31:54,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:54,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837750223] [2022-04-06 16:31:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:54,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:31:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:31:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:31:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:31:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:31:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 16:31:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 16:31:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:31:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:31:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:54,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837750223] [2022-04-06 16:31:54,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837750223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:54,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:54,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:31:54,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:54,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764874019] [2022-04-06 16:31:54,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764874019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:54,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:54,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:31:54,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058312241] [2022-04-06 16:31:54,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:54,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:31:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:31:54,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:31:54,923 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:31:55,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:55,012 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-04-06 16:31:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:31:55,014 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 16:31:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:55,023 INFO L225 Difference]: With dead ends: 73 [2022-04-06 16:31:55,023 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 16:31:55,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 16:31:55,029 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:55,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:55,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 16:31:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 16:31:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 16:31:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-06 16:31:55,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-06 16:31:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:55,079 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-06 16:31:55,080 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:31:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-06 16:31:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 16:31:55,081 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:55,082 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:55,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:31:55,082 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-04-06 16:31:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:55,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [4596258] [2022-04-06 16:31:55,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-04-06 16:31:55,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:55,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369560092] [2022-04-06 16:31:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:55,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:55,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:55,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596991774] [2022-04-06 16:31:55,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:55,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:55,127 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 16:31:55,128 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 16:31:55,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:55,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:55,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:31:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 16:31:55,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 16:31:55,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369560092] [2022-04-06 16:31:55,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596991774] [2022-04-06 16:31:55,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596991774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:55,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:55,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 16:31:55,465 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:55,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [4596258] [2022-04-06 16:31:55,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [4596258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:55,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:55,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:31:55,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970424765] [2022-04-06 16:31:55,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:55,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:31:55,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:31:55,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:31:55,467 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:31:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:55,569 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-06 16:31:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:31:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-06 16:31:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:55,573 INFO L225 Difference]: With dead ends: 52 [2022-04-06 16:31:55,573 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 16:31:55,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:31:55,575 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:55,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 16:31:55,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 16:31:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 16:31:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 16:31:55,584 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-04-06 16:31:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:55,585 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 16:31:55,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:31:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 16:31:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 16:31:55,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:55,586 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:55,613 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 16:31:55,786 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 16:31:55,788 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-04-06 16:31:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:55,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [561738309] [2022-04-06 16:31:55,789 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-04-06 16:31:55,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:55,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096979057] [2022-04-06 16:31:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:55,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:55,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146137161] [2022-04-06 16:31:55,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:55,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:55,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:55,801 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 16:31:55,802 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 16:31:55,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:31:55,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:55,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 16:31:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:31:55,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:31:55,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:55,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096979057] [2022-04-06 16:31:55,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:55,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146137161] [2022-04-06 16:31:55,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146137161] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:55,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:55,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:55,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:55,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [561738309] [2022-04-06 16:31:55,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [561738309] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:55,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:55,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522495507] [2022-04-06 16:31:55,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:55,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:31:55,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:55,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:31:55,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:31:55,936 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 16:31:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:56,001 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-04-06 16:31:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:31:56,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-04-06 16:31:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:56,003 INFO L225 Difference]: With dead ends: 50 [2022-04-06 16:31:56,003 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 16:31:56,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 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 16:31:56,012 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:56,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:31:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 16:31:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-04-06 16:31:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:31:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-04-06 16:31:56,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-04-06 16:31:56,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:56,038 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-04-06 16:31:56,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 16:31:56,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-04-06 16:31:56,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 16:31:56,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:56,039 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-04-06 16:31:56,057 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 16:31:56,239 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 16:31:56,240 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-04-06 16:31:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [692815036] [2022-04-06 16:31:56,241 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:56,241 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-04-06 16:31:56,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259638473] [2022-04-06 16:31:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:56,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:56,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088776976] [2022-04-06 16:31:56,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:56,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:56,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:56,257 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 16:31:56,263 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 16:31:56,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:31:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:31:56,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:31:56,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:56,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259638473] [2022-04-06 16:31:56,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:56,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088776976] [2022-04-06 16:31:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088776976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:56,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:56,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:56,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:56,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [692815036] [2022-04-06 16:31:56,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [692815036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:56,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:56,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:56,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621044047] [2022-04-06 16:31:56,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:56,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:31:56,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:31:56,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:31:56,441 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 16:31:56,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:56,476 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-04-06 16:31:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:31:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 50 [2022-04-06 16:31:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:56,478 INFO L225 Difference]: With dead ends: 58 [2022-04-06 16:31:56,478 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 16:31:56,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 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 16:31:56,479 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:56,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:31:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 16:31:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 16:31:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 16:31:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-04-06 16:31:56,486 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-04-06 16:31:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:56,487 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-04-06 16:31:56,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 16:31:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-04-06 16:31:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 16:31:56,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:56,488 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:56,504 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 16:31:56,702 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 16:31:56,702 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:56,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-04-06 16:31:56,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:56,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048242769] [2022-04-06 16:31:56,703 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:56,703 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-04-06 16:31:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411861396] [2022-04-06 16:31:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:56,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021941717] [2022-04-06 16:31:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:56,736 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 16:31:56,737 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 16:31:56,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:56,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:31:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:31:56,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:31:56,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:56,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411861396] [2022-04-06 16:31:56,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:56,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021941717] [2022-04-06 16:31:56,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021941717] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:56,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:56,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:56,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048242769] [2022-04-06 16:31:56,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048242769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:56,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:56,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:56,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474150778] [2022-04-06 16:31:56,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:56,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:31:56,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:31:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:31:56,901 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 16:31:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:56,944 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-04-06 16:31:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:31:56,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 55 [2022-04-06 16:31:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:56,945 INFO L225 Difference]: With dead ends: 62 [2022-04-06 16:31:56,945 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 16:31:56,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 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 16:31:56,946 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:56,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 151 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:31:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 16:31:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 16:31:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 16:31:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-04-06 16:31:56,953 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-04-06 16:31:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:56,953 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-04-06 16:31:56,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 16:31:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-04-06 16:31:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 16:31:56,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:56,954 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:56,972 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 16:31:57,167 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 16:31:57,167 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-04-06 16:31:57,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:57,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [196363017] [2022-04-06 16:31:57,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-04-06 16:31:57,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:57,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346975207] [2022-04-06 16:31:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:57,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:57,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:57,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691517986] [2022-04-06 16:31:57,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:57,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:57,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:57,203 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 16:31:57,233 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 16:31:57,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:57,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:31:57,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 16:31:57,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:57,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:57,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346975207] [2022-04-06 16:31:57,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691517986] [2022-04-06 16:31:57,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691517986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:31:57,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:31:57,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 16:31:57,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:57,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [196363017] [2022-04-06 16:31:57,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [196363017] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:57,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:57,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:31:57,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37354593] [2022-04-06 16:31:57,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:57,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:31:57,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:57,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:31:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:31:57,518 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 16:31:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:57,611 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-04-06 16:31:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:31:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-06 16:31:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:57,613 INFO L225 Difference]: With dead ends: 66 [2022-04-06 16:31:57,613 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 16:31:57,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:31:57,613 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:57,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:57,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 16:31:57,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 16:31:57,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 16:31:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-04-06 16:31:57,621 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-04-06 16:31:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:57,621 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-04-06 16:31:57,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 16:31:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-04-06 16:31:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 16:31:57,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:57,622 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2022-04-06 16:31:57,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 16:31:57,831 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 16:31:57,831 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-04-06 16:31:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [689595002] [2022-04-06 16:31:57,838 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-04-06 16:31:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627335569] [2022-04-06 16:31:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:57,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:57,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657717380] [2022-04-06 16:31:57,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:57,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:57,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:57,867 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 16:31:57,895 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 16:31:57,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:57,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:57,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:31:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 16:31:58,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-04-06 16:31:58,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:58,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627335569] [2022-04-06 16:31:58,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:58,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657717380] [2022-04-06 16:31:58,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657717380] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:31:58,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:31:58,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 16:31:58,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [689595002] [2022-04-06 16:31:58,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [689595002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:58,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:58,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:31:58,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864207725] [2022-04-06 16:31:58,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:58,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:31:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:31:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:31:58,186 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 16:31:58,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:58,225 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-06 16:31:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:31:58,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-04-06 16:31:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:58,226 INFO L225 Difference]: With dead ends: 69 [2022-04-06 16:31:58,226 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 16:31:58,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 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 16:31:58,227 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:58,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 137 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:31:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 16:31:58,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-04-06 16:31:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 16:31:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-04-06 16:31:58,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-04-06 16:31:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:58,234 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-04-06 16:31:58,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 16:31:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-04-06 16:31:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:31:58,234 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:58,235 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:58,258 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 16:31:58,448 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 16:31:58,448 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-04-06 16:31:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:58,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1683287407] [2022-04-06 16:31:58,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:58,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-04-06 16:31:58,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:58,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103494180] [2022-04-06 16:31:58,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:58,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:58,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:58,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432770194] [2022-04-06 16:31:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:58,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:58,467 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 16:31:58,470 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 16:31:58,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:31:58,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 16:31:58,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 16:31:58,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:58,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103494180] [2022-04-06 16:31:58,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:58,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432770194] [2022-04-06 16:31:58,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432770194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:58,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:58,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:31:58,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:58,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1683287407] [2022-04-06 16:31:58,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1683287407] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:58,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:58,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:31:58,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735629285] [2022-04-06 16:31:58,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:58,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:31:58,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:58,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:31:58,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:31:58,736 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:31:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:58,896 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-04-06 16:31:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:31:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-06 16:31:58,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:58,902 INFO L225 Difference]: With dead ends: 106 [2022-04-06 16:31:58,902 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 16:31:58,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:31:58,902 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:58,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 16:31:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-06 16:31:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 16:31:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-04-06 16:31:58,931 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-04-06 16:31:58,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:58,931 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-04-06 16:31:58,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:31:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-04-06 16:31:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 16:31:58,933 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:58,933 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:31:58,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 16:31:59,147 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 16:31:59,148 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-04-06 16:31:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:59,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108584306] [2022-04-06 16:31:59,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-04-06 16:31:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:59,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164313464] [2022-04-06 16:31:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:59,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:59,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937591159] [2022-04-06 16:31:59,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:31:59,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:59,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:59,166 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 16:31:59,166 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 16:31:59,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:31:59,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:31:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 16:31:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:31:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:31:59,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:31:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:31:59,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:31:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164313464] [2022-04-06 16:31:59,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:31:59,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937591159] [2022-04-06 16:31:59,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937591159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:31:59,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:31:59,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 16:31:59,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:31:59,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108584306] [2022-04-06 16:31:59,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108584306] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:31:59,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:31:59,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:31:59,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985707236] [2022-04-06 16:31:59,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:31:59,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:31:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:31:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:31:59,553 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:31:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:31:59,719 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-04-06 16:31:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:31:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 16:31:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:31:59,721 INFO L225 Difference]: With dead ends: 124 [2022-04-06 16:31:59,721 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 16:31:59,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:31:59,723 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:31:59,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 244 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:31:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 16:31:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-04-06 16:31:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:31:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-04-06 16:31:59,749 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-04-06 16:31:59,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:31:59,749 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-04-06 16:31:59,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:31:59,749 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-04-06 16:31:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 16:31:59,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:31:59,750 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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 16:31:59,785 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 16:31:59,966 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 16:31:59,966 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:31:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:31:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-04-06 16:31:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:31:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9003712] [2022-04-06 16:31:59,967 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:31:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-04-06 16:31:59,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:31:59,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382486806] [2022-04-06 16:31:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:31:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:31:59,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:31:59,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878062878] [2022-04-06 16:31:59,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:31:59,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:31:59,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:31:59,975 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 16:31:59,976 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 16:32:00,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:32:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:32:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 16:32:00,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 16:32:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382486806] [2022-04-06 16:32:00,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878062878] [2022-04-06 16:32:00,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878062878] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:00,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:00,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-04-06 16:32:00,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:00,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9003712] [2022-04-06 16:32:00,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9003712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:00,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:00,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:32:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23680164] [2022-04-06 16:32:00,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:00,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:32:00,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:32:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:32:00,984 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 16:32:01,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:01,590 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-04-06 16:32:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:32:01,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-04-06 16:32:01,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:01,591 INFO L225 Difference]: With dead ends: 134 [2022-04-06 16:32:01,591 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 16:32:01,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:32:01,592 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:01,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 199 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:32:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 16:32:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 16:32:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:32:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-04-06 16:32:01,606 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 80 [2022-04-06 16:32:01,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:01,606 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-04-06 16:32:01,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 16:32:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-04-06 16:32:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:32:01,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:01,607 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2022-04-06 16:32:01,633 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 16:32:01,823 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 16:32:01,823 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-04-06 16:32:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1065267084] [2022-04-06 16:32:01,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-04-06 16:32:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92161688] [2022-04-06 16:32:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:01,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:01,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859734244] [2022-04-06 16:32:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:32:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:01,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:01,832 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 16:32:01,838 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 16:32:01,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:32:01,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:32:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-04-06 16:32:02,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:02,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92161688] [2022-04-06 16:32:02,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859734244] [2022-04-06 16:32:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859734244] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:32:02,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:32:02,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 16:32:02,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1065267084] [2022-04-06 16:32:02,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1065267084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:02,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:02,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 16:32:02,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132802613] [2022-04-06 16:32:02,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:02,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 16:32:02,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:02,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 16:32:02,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:32:02,415 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 16:32:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:02,737 INFO L93 Difference]: Finished difference Result 138 states and 182 transitions. [2022-04-06 16:32:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:32:02,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-04-06 16:32:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:02,739 INFO L225 Difference]: With dead ends: 138 [2022-04-06 16:32:02,739 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 16:32:02,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:32:02,739 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 26 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:02,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 182 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:32:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 16:32:02,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-04-06 16:32:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 76 states have internal predecessors, (87), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:32:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 178 transitions. [2022-04-06 16:32:02,754 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 178 transitions. Word has length 85 [2022-04-06 16:32:02,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:02,754 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 178 transitions. [2022-04-06 16:32:02,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 16:32:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 178 transitions. [2022-04-06 16:32:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 16:32:02,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:02,754 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1] [2022-04-06 16:32:02,771 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 16:32:02,971 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 16:32:02,971 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-04-06 16:32:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590587299] [2022-04-06 16:32:02,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-04-06 16:32:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:02,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034874080] [2022-04-06 16:32:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:02,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:02,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009839607] [2022-04-06 16:32:02,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:32:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:02,987 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 16:32:02,988 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 16:32:03,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:32:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 16:32:03,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 16:32:03,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 16:32:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034874080] [2022-04-06 16:32:03,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009839607] [2022-04-06 16:32:03,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009839607] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:03,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:03,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:32:03,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590587299] [2022-04-06 16:32:03,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590587299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:03,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:03,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:32:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186121999] [2022-04-06 16:32:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:03,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:32:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:32:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:32:03,633 INFO L87 Difference]: Start difference. First operand 134 states and 178 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 16:32:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:03,893 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2022-04-06 16:32:03,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:32:03,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-04-06 16:32:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:03,895 INFO L225 Difference]: With dead ends: 161 [2022-04-06 16:32:03,895 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 16:32:03,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:32:03,895 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:03,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 275 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:32:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 16:32:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-04-06 16:32:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 89 states have internal predecessors, (102), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:32:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-04-06 16:32:03,913 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 91 [2022-04-06 16:32:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:03,913 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-04-06 16:32:03,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 16:32:03,913 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-04-06 16:32:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 16:32:03,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:03,914 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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, 1, 1, 1, 1] [2022-04-06 16:32:03,930 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 16:32:04,127 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 16:32:04,127 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-04-06 16:32:04,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1951699521] [2022-04-06 16:32:04,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:04,128 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-04-06 16:32:04,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:04,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635482165] [2022-04-06 16:32:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:04,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:04,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115612551] [2022-04-06 16:32:04,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:32:04,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:04,136 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 16:32:04,166 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 16:32:04,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:32:04,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:32:04,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 16:32:04,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:32:04,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635482165] [2022-04-06 16:32:04,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115612551] [2022-04-06 16:32:04,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115612551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:04,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:04,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:32:04,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1951699521] [2022-04-06 16:32:04,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1951699521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:04,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:04,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:32:04,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287907923] [2022-04-06 16:32:04,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:04,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:32:04,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:04,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:32:04,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:32:04,299 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 16:32:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:04,363 INFO L93 Difference]: Finished difference Result 205 states and 283 transitions. [2022-04-06 16:32:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:32:04,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-04-06 16:32:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:04,364 INFO L225 Difference]: With dead ends: 205 [2022-04-06 16:32:04,364 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 16:32:04,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 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 16:32:04,367 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:04,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 163 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:32:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 16:32:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2022-04-06 16:32:04,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 81 states have (on average 1.123456790123457) internal successors, (91), 83 states have internal predecessors, (91), 55 states have call successors, (55), 15 states have call predecessors, (55), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:32:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-04-06 16:32:04,387 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 100 [2022-04-06 16:32:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:04,389 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-04-06 16:32:04,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 16:32:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-04-06 16:32:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 16:32:04,392 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:04,392 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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] [2022-04-06 16:32:04,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 16:32:04,611 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 16:32:04,611 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-04-06 16:32:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:04,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068137293] [2022-04-06 16:32:04,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-04-06 16:32:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:04,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557145616] [2022-04-06 16:32:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:04,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:04,633 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:04,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99091725] [2022-04-06 16:32:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:32:04,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:04,641 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 16:32:04,642 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 16:32:04,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:32:04,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 16:32:04,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 16:32:05,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 16:32:25,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557145616] [2022-04-06 16:32:25,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99091725] [2022-04-06 16:32:25,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99091725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:25,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:25,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-04-06 16:32:25,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068137293] [2022-04-06 16:32:25,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068137293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:25,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:25,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:32:25,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496004447] [2022-04-06 16:32:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:25,571 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:32:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:32:25,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:32:25,571 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 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 16:32:26,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:26,632 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2022-04-06 16:32:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:32:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 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 107 [2022-04-06 16:32:26,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:26,633 INFO L225 Difference]: With dead ends: 158 [2022-04-06 16:32:26,633 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 16:32:26,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:32:26,634 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:26,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 195 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:32:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 16:32:26,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-04-06 16:32:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:32:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-04-06 16:32:26,653 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 107 [2022-04-06 16:32:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:26,655 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-04-06 16:32:26,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 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 16:32:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-04-06 16:32:26,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 16:32:26,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:26,656 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:32:26,677 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 16:32:26,877 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 16:32:26,878 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-04-06 16:32:26,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1688839046] [2022-04-06 16:32:26,879 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-04-06 16:32:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974439433] [2022-04-06 16:32:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:26,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:26,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545805904] [2022-04-06 16:32:26,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:32:26,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:26,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:26,887 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 16:32:26,887 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 16:32:26,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:32:26,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:26,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:32:26,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:27,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:32:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 58 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-04-06 16:32:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:29,338 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:32:34,498 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:32:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 55 proven. 45 refuted. 4 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 16:32:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:44,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974439433] [2022-04-06 16:32:44,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:44,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545805904] [2022-04-06 16:32:44,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545805904] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:44,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:44,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-04-06 16:32:44,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:44,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1688839046] [2022-04-06 16:32:44,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1688839046] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:44,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:44,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:32:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147800769] [2022-04-06 16:32:44,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:44,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:32:44,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:32:44,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=626, Unknown=5, NotChecked=0, Total=756 [2022-04-06 16:32:44,164 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 16:32:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:45,595 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-04-06 16:32:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:32:45,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2022-04-06 16:32:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:45,597 INFO L225 Difference]: With dead ends: 188 [2022-04-06 16:32:45,597 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 16:32:45,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 198 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=185, Invalid=932, Unknown=5, NotChecked=0, Total=1122 [2022-04-06 16:32:45,600 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:45,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 267 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 16:32:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 16:32:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-04-06 16:32:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 99 states have (on average 1.121212121212121) internal successors, (111), 101 states have internal predecessors, (111), 67 states have call successors, (67), 18 states have call predecessors, (67), 17 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 16:32:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2022-04-06 16:32:45,622 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 113 [2022-04-06 16:32:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:45,622 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2022-04-06 16:32:45,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 16:32:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2022-04-06 16:32:45,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:32:45,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:45,623 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 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, 1, 1, 1, 1] [2022-04-06 16:32:45,641 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 16:32:45,839 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 16:32:45,839 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-04-06 16:32:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393212071] [2022-04-06 16:32:45,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-04-06 16:32:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:45,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654543838] [2022-04-06 16:32:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:45,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:45,846 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:45,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116351634] [2022-04-06 16:32:45,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:32:45,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:45,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:45,852 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 16:32:45,852 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 16:32:45,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:32:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:32:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 16:32:46,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 16:32:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654543838] [2022-04-06 16:32:46,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116351634] [2022-04-06 16:32:46,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116351634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:46,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:46,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-04-06 16:32:46,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:46,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393212071] [2022-04-06 16:32:46,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393212071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:46,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:46,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:32:46,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514419894] [2022-04-06 16:32:46,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:46,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:32:46,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:32:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:32:46,245 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-04-06 16:32:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:46,452 INFO L93 Difference]: Finished difference Result 244 states and 342 transitions. [2022-04-06 16:32:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:32:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-04-06 16:32:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:46,454 INFO L225 Difference]: With dead ends: 244 [2022-04-06 16:32:46,454 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 16:32:46,454 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:32:46,454 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:46,454 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 280 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:32:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 16:32:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 217. [2022-04-06 16:32:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 112 states have (on average 1.1517857142857142) internal successors, (129), 114 states have internal predecessors, (129), 87 states have call successors, (87), 18 states have call predecessors, (87), 17 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 16:32:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 300 transitions. [2022-04-06 16:32:46,481 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 300 transitions. Word has length 116 [2022-04-06 16:32:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:46,482 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 300 transitions. [2022-04-06 16:32:46,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-04-06 16:32:46,482 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 300 transitions. [2022-04-06 16:32:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 16:32:46,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:46,483 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-04-06 16:32:46,499 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 16:32:46,698 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 16:32:46,698 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-04-06 16:32:46,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:46,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15984906] [2022-04-06 16:32:46,699 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-04-06 16:32:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:46,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522320866] [2022-04-06 16:32:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:46,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:46,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554733444] [2022-04-06 16:32:46,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:32:46,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:46,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:46,707 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 16:32:46,708 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 16:32:46,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:32:46,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:46,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:32:46,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 16:32:46,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 16:32:47,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:47,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522320866] [2022-04-06 16:32:47,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:47,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554733444] [2022-04-06 16:32:47,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554733444] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:47,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:47,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:32:47,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:47,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15984906] [2022-04-06 16:32:47,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15984906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:47,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:47,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:32:47,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945817223] [2022-04-06 16:32:47,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:47,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:32:47,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:32:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:32:47,095 INFO L87 Difference]: Start difference. First operand 217 states and 300 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:32:47,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:47,306 INFO L93 Difference]: Finished difference Result 235 states and 314 transitions. [2022-04-06 16:32:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:32:47,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-04-06 16:32:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:47,307 INFO L225 Difference]: With dead ends: 235 [2022-04-06 16:32:47,307 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 16:32:47,308 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:32:47,308 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:47,308 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 183 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:32:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 16:32:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-04-06 16:32:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:32:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2022-04-06 16:32:47,334 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 122 [2022-04-06 16:32:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:47,335 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2022-04-06 16:32:47,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:32:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2022-04-06 16:32:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 16:32:47,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:47,336 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1] [2022-04-06 16:32:47,354 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 16:32:47,547 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 16:32:47,547 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-04-06 16:32:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2095538625] [2022-04-06 16:32:47,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-04-06 16:32:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325464087] [2022-04-06 16:32:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:47,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:47,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039937282] [2022-04-06 16:32:47,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:32:47,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:47,568 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 16:32:47,569 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 16:32:47,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:32:47,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:47,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 16:32:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:32:48,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:32:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:49,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325464087] [2022-04-06 16:32:49,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:49,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039937282] [2022-04-06 16:32:49,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039937282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:32:49,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:32:49,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-04-06 16:32:49,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:49,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2095538625] [2022-04-06 16:32:49,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2095538625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:49,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:49,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:32:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28525942] [2022-04-06 16:32:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:49,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:32:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:32:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:32:49,288 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:32:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:49,720 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-04-06 16:32:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:32:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-04-06 16:32:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:49,731 INFO L225 Difference]: With dead ends: 269 [2022-04-06 16:32:49,731 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 16:32:49,732 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:32:49,732 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:49,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 378 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:32:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 16:32:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-04-06 16:32:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 16:32:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-04-06 16:32:49,763 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 127 [2022-04-06 16:32:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:49,764 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-04-06 16:32:49,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:32:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-04-06 16:32:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 16:32:49,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:49,765 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 16:32:49,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:32:49,981 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 16:32:49,981 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:49,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-04-06 16:32:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:49,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600216261] [2022-04-06 16:32:49,982 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:49,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-04-06 16:32:49,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:49,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284932520] [2022-04-06 16:32:49,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:49,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:49,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739265035] [2022-04-06 16:32:49,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:32:49,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:49,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:49,992 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 16:32:50,022 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 16:32:50,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:32:50,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:50,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:32:50,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:32:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 91 proven. 42 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-04-06 16:32:50,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:32:52,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:32:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284932520] [2022-04-06 16:32:52,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:32:52,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739265035] [2022-04-06 16:32:52,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739265035] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:32:52,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:32:52,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 16:32:52,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:32:52,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600216261] [2022-04-06 16:32:52,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600216261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:32:52,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:32:52,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:32:52,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575944798] [2022-04-06 16:32:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:32:52,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:32:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:52,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:32:52,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:32:52,061 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-04-06 16:32:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:32:52,448 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-04-06 16:32:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:32:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 129 [2022-04-06 16:32:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:32:52,450 INFO L225 Difference]: With dead ends: 281 [2022-04-06 16:32:52,450 INFO L226 Difference]: Without dead ends: 279 [2022-04-06 16:32:52,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:32:52,451 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 16 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:32:52,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 199 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:32:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-04-06 16:32:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 258. [2022-04-06 16:32:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.118881118881119) internal successors, (160), 145 states have internal predecessors, (160), 88 states have call successors, (88), 27 states have call predecessors, (88), 26 states have return successors, (86), 85 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 16:32:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 334 transitions. [2022-04-06 16:32:52,483 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 334 transitions. Word has length 129 [2022-04-06 16:32:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:32:52,483 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 334 transitions. [2022-04-06 16:32:52,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-04-06 16:32:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 334 transitions. [2022-04-06 16:32:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 16:32:52,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:32:52,484 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 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, 1] [2022-04-06 16:32:52,501 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 16:32:52,701 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 16:32:52,701 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:32:52,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:32:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-04-06 16:32:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:32:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1520601291] [2022-04-06 16:32:52,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:32:52,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-04-06 16:32:52,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:32:52,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560034021] [2022-04-06 16:32:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:32:52,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:32:52,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:32:52,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256031164] [2022-04-06 16:32:52,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:32:52,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:32:52,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:32:52,709 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 16:32:52,748 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 16:32:52,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:32:52,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:32:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 16:32:52,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:03,649 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:33:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 133 proven. 85 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2022-04-06 16:33:03,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:03,781 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:03,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:03,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560034021] [2022-04-06 16:33:03,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256031164] [2022-04-06 16:33:03,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256031164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:33:03,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:33:03,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 16:33:03,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1520601291] [2022-04-06 16:33:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1520601291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:03,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:03,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:33:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304781694] [2022-04-06 16:33:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:03,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:33:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:33:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:33:03,895 INFO L87 Difference]: Start difference. First operand 258 states and 334 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:33:06,281 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 16:33:20,375 WARN L232 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 36 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:33:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:20,541 INFO L93 Difference]: Finished difference Result 296 states and 384 transitions. [2022-04-06 16:33:20,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:33:20,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 132 [2022-04-06 16:33:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:20,542 INFO L225 Difference]: With dead ends: 296 [2022-04-06 16:33:20,542 INFO L226 Difference]: Without dead ends: 294 [2022-04-06 16:33:20,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:33:20,543 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:20,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 173 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 329 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 16:33:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-04-06 16:33:20,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 291. [2022-04-06 16:33:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 161 states have (on average 1.124223602484472) internal successors, (181), 163 states have internal predecessors, (181), 100 states have call successors, (100), 30 states have call predecessors, (100), 29 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-04-06 16:33:20,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 379 transitions. [2022-04-06 16:33:20,579 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 379 transitions. Word has length 132 [2022-04-06 16:33:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:20,579 INFO L478 AbstractCegarLoop]: Abstraction has 291 states and 379 transitions. [2022-04-06 16:33:20,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:33:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 379 transitions. [2022-04-06 16:33:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 16:33:20,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:20,580 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:33:20,597 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 16:33:20,797 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 16:33:20,797 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-04-06 16:33:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:20,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233349205] [2022-04-06 16:33:20,798 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:20,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-04-06 16:33:20,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:20,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143067061] [2022-04-06 16:33:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:20,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:20,815 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:20,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752620980] [2022-04-06 16:33:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:33:20,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:20,831 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 16:33:20,832 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 16:33:20,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:33:20,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:20,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 16:33:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-04-06 16:33:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-04-06 16:33:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143067061] [2022-04-06 16:33:24,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752620980] [2022-04-06 16:33:24,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752620980] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:33:24,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:33:24,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-04-06 16:33:24,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:24,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233349205] [2022-04-06 16:33:24,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233349205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:24,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:24,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:33:24,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649936476] [2022-04-06 16:33:24,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:24,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:33:24,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:33:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:33:24,156 INFO L87 Difference]: Start difference. First operand 291 states and 379 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 16:33:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:25,810 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-04-06 16:33:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:33:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-04-06 16:33:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:25,812 INFO L225 Difference]: With dead ends: 339 [2022-04-06 16:33:25,812 INFO L226 Difference]: Without dead ends: 332 [2022-04-06 16:33:25,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-04-06 16:33:25,813 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:25,814 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 326 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 16:33:25,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-04-06 16:33:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 301. [2022-04-06 16:33:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 166 states have (on average 1.1265060240963856) internal successors, (187), 168 states have internal predecessors, (187), 104 states have call successors, (104), 31 states have call predecessors, (104), 30 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2022-04-06 16:33:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 393 transitions. [2022-04-06 16:33:25,855 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 393 transitions. Word has length 135 [2022-04-06 16:33:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:25,855 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 393 transitions. [2022-04-06 16:33:25,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 16:33:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 393 transitions. [2022-04-06 16:33:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:33:25,857 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:25,857 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 16:33:25,873 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 16:33:26,072 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 16:33:26,072 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-04-06 16:33:26,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:26,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1468640577] [2022-04-06 16:33:26,076 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:26,076 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-04-06 16:33:26,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498477226] [2022-04-06 16:33:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:26,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:26,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [661201055] [2022-04-06 16:33:26,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:33:26,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:26,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:26,085 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 16:33:26,086 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 16:33:26,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:33:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:26,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 16:33:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:27,566 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:27,568 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:27,568 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 149 proven. 58 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-04-06 16:33:27,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-04-06 16:33:30,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:30,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498477226] [2022-04-06 16:33:30,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:30,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661201055] [2022-04-06 16:33:30,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661201055] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:33:30,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:33:30,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15] total 32 [2022-04-06 16:33:30,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1468640577] [2022-04-06 16:33:30,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1468640577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:30,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:30,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:33:30,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73974359] [2022-04-06 16:33:30,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:30,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:33:30,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:30,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:33:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:33:30,247 INFO L87 Difference]: Start difference. First operand 301 states and 393 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 16:33:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:33,807 INFO L93 Difference]: Finished difference Result 351 states and 459 transitions. [2022-04-06 16:33:33,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:33:33,808 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-04-06 16:33:33,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:33,810 INFO L225 Difference]: With dead ends: 351 [2022-04-06 16:33:33,810 INFO L226 Difference]: Without dead ends: 348 [2022-04-06 16:33:33,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 16:33:33,812 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:33,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 278 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 16:33:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-04-06 16:33:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 315. [2022-04-06 16:33:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 176 states have internal predecessors, (196), 108 states have call successors, (108), 33 states have call predecessors, (108), 32 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2022-04-06 16:33:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2022-04-06 16:33:33,867 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 138 [2022-04-06 16:33:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:33,868 INFO L478 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2022-04-06 16:33:33,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2022-04-06 16:33:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2022-04-06 16:33:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 16:33:33,869 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:33,869 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2022-04-06 16:33:33,901 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 16:33:34,078 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 16:33:34,078 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:34,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-04-06 16:33:34,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:34,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608287568] [2022-04-06 16:33:34,079 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-04-06 16:33:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:34,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003695180] [2022-04-06 16:33:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:34,085 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:34,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931831410] [2022-04-06 16:33:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:33:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:34,086 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 16:33:34,121 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 16:33:34,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:33:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 16:33:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-04-06 16:33:34,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-04-06 16:33:35,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003695180] [2022-04-06 16:33:35,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931831410] [2022-04-06 16:33:35,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931831410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:33:35,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:33:35,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-04-06 16:33:35,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:35,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608287568] [2022-04-06 16:33:35,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608287568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:35,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:35,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:33:35,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052100768] [2022-04-06 16:33:35,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:35,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:33:35,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:33:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:33:35,067 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:33:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:33:35,873 INFO L93 Difference]: Finished difference Result 383 states and 501 transitions. [2022-04-06 16:33:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:33:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-04-06 16:33:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:33:35,875 INFO L225 Difference]: With dead ends: 383 [2022-04-06 16:33:35,875 INFO L226 Difference]: Without dead ends: 381 [2022-04-06 16:33:35,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:33:35,875 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 38 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:33:35,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 315 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 16:33:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-04-06 16:33:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-04-06 16:33:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 209 states have internal predecessors, (233), 132 states have call successors, (132), 38 states have call predecessors, (132), 37 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2022-04-06 16:33:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 495 transitions. [2022-04-06 16:33:35,956 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 495 transitions. Word has length 149 [2022-04-06 16:33:35,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:33:35,957 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 495 transitions. [2022-04-06 16:33:35,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:33:35,957 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 495 transitions. [2022-04-06 16:33:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 16:33:35,968 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:33:35,968 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-04-06 16:33:35,984 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 16:33:36,168 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 16:33:36,168 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:33:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:33:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 13 times [2022-04-06 16:33:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7392791] [2022-04-06 16:33:36,169 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:33:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 14 times [2022-04-06 16:33:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:33:36,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086960599] [2022-04-06 16:33:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:33:36,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:33:36,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:33:36,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94766265] [2022-04-06 16:33:36,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:33:36,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:33:36,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:33:36,191 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 16:33:36,231 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 16:33:36,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:33:36,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:33:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 16:33:36,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:33:36,761 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:36,774 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:37,805 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:37,807 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:38,502 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:33:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 192 proven. 173 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 16:33:46,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:33:55,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:33:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086960599] [2022-04-06 16:33:55,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:33:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94766265] [2022-04-06 16:33:55,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94766265] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:33:55,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:33:55,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 16:33:55,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:33:55,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7392791] [2022-04-06 16:33:55,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7392791] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:33:55,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:33:55,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:33:55,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215897432] [2022-04-06 16:33:55,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:33:55,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:33:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:33:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:33:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=395, Unknown=3, NotChecked=0, Total=506 [2022-04-06 16:33:55,939 INFO L87 Difference]: Start difference. First operand 377 states and 495 transitions. Second operand has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-04-06 16:34:45,370 WARN L232 SmtUtils]: Spent 44.94s on a formula simplification. DAG size of input: 72 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:34:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:34:45,625 INFO L93 Difference]: Finished difference Result 400 states and 519 transitions. [2022-04-06 16:34:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:34:45,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2022-04-06 16:34:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:34:45,629 INFO L225 Difference]: With dead ends: 400 [2022-04-06 16:34:45,629 INFO L226 Difference]: Without dead ends: 398 [2022-04-06 16:34:45,629 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=147, Invalid=606, Unknown=3, NotChecked=0, Total=756 [2022-04-06 16:34:45,630 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 26 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:34:45,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 411 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 915 Invalid, 0 Unknown, 112 Unchecked, 3.5s Time] [2022-04-06 16:34:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-04-06 16:34:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 397. [2022-04-06 16:34:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 220 states have (on average 1.1181818181818182) internal successors, (246), 223 states have internal predecessors, (246), 136 states have call successors, (136), 41 states have call predecessors, (136), 40 states have return successors, (134), 132 states have call predecessors, (134), 134 states have call successors, (134) [2022-04-06 16:34:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 516 transitions. [2022-04-06 16:34:45,709 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 516 transitions. Word has length 154 [2022-04-06 16:34:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:34:45,709 INFO L478 AbstractCegarLoop]: Abstraction has 397 states and 516 transitions. [2022-04-06 16:34:45,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-04-06 16:34:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 516 transitions. [2022-04-06 16:34:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 16:34:45,710 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:34:45,710 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2022-04-06 16:34:45,726 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 16:34:45,923 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 16:34:45,924 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:34:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:34:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-04-06 16:34:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:34:45,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881357080] [2022-04-06 16:34:45,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:34:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-04-06 16:34:45,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:34:45,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231473729] [2022-04-06 16:34:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:34:45,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:34:45,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:34:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328943654] [2022-04-06 16:34:45,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:34:45,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:34:45,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:34:45,937 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 16:34:45,937 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 16:34:46,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:34:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:34:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 16:34:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:34:47,960 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 97 refuted. 0 times theorem prover too weak. 736 trivial. 0 not checked. [2022-04-06 16:34:47,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:34:48,400 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:35:15,679 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:37:33,952 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_361 Int) (v_main_~s~0_BEFORE_CALL_339 Int) (v_main_~k~0_BEFORE_CALL_206 Int) (v_main_~x~0_BEFORE_CALL_345 Int) (v_main_~p~0_BEFORE_CALL_277 Int) (v_main_~q~0_BEFORE_CALL_330 Int) (v_main_~r~0_BEFORE_CALL_305 Int) (v_main_~b~0_BEFORE_CALL_353 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_206 v_main_~b~0_BEFORE_CALL_353) v_main_~b~0_BEFORE_CALL_353) 0) (<= v_main_~b~0_BEFORE_CALL_353 0) (= (+ (* v_main_~p~0_BEFORE_CALL_277 v_main_~x~0_BEFORE_CALL_345) (* v_main_~y~0_BEFORE_CALL_361 v_main_~r~0_BEFORE_CALL_305)) (+ (* v_main_~k~0_BEFORE_CALL_206 v_main_~y~0_BEFORE_CALL_361 v_main_~s~0_BEFORE_CALL_339) (* v_main_~k~0_BEFORE_CALL_206 v_main_~x~0_BEFORE_CALL_345 v_main_~q~0_BEFORE_CALL_330))))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true [2022-04-06 16:38:35,343 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_361 Int) (v_main_~s~0_BEFORE_CALL_339 Int) (v_main_~k~0_BEFORE_CALL_206 Int) (v_main_~x~0_BEFORE_CALL_345 Int) (v_main_~p~0_BEFORE_CALL_277 Int) (v_main_~q~0_BEFORE_CALL_330 Int) (v_main_~r~0_BEFORE_CALL_305 Int) (v_main_~b~0_BEFORE_CALL_353 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_206 v_main_~b~0_BEFORE_CALL_353) v_main_~b~0_BEFORE_CALL_353) 0) (<= v_main_~b~0_BEFORE_CALL_353 0) (= (+ (* v_main_~p~0_BEFORE_CALL_277 v_main_~x~0_BEFORE_CALL_345) (* v_main_~y~0_BEFORE_CALL_361 v_main_~r~0_BEFORE_CALL_305)) (+ (* v_main_~k~0_BEFORE_CALL_206 v_main_~y~0_BEFORE_CALL_361 v_main_~s~0_BEFORE_CALL_339) (* v_main_~k~0_BEFORE_CALL_206 v_main_~x~0_BEFORE_CALL_345 v_main_~q~0_BEFORE_CALL_330))))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 16:39:07,475 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~y~0_BEFORE_CALL_361 Int) (v_main_~s~0_BEFORE_CALL_339 Int) (v_main_~k~0_BEFORE_CALL_206 Int) (v_main_~x~0_BEFORE_CALL_345 Int) (v_main_~p~0_BEFORE_CALL_277 Int) (v_main_~q~0_BEFORE_CALL_330 Int) (v_main_~r~0_BEFORE_CALL_305 Int) (v_main_~b~0_BEFORE_CALL_353 Int)) (or (= (mod (* v_main_~k~0_BEFORE_CALL_206 v_main_~b~0_BEFORE_CALL_353) v_main_~b~0_BEFORE_CALL_353) 0) (<= v_main_~b~0_BEFORE_CALL_353 0) (= (+ (* v_main_~p~0_BEFORE_CALL_277 v_main_~x~0_BEFORE_CALL_345) (* v_main_~y~0_BEFORE_CALL_361 v_main_~r~0_BEFORE_CALL_305)) (+ (* v_main_~k~0_BEFORE_CALL_206 v_main_~y~0_BEFORE_CALL_361 v_main_~s~0_BEFORE_CALL_339) (* v_main_~k~0_BEFORE_CALL_206 v_main_~x~0_BEFORE_CALL_345 v_main_~q~0_BEFORE_CALL_330))))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-04-06 16:39:09,661 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 122 proven. 75 refuted. 12 times theorem prover too weak. 708 trivial. 5 not checked. [2022-04-06 16:39:09,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:09,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231473729] [2022-04-06 16:39:09,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:09,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328943654] [2022-04-06 16:39:09,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328943654] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:09,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:09,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 26 [2022-04-06 16:39:09,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:09,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881357080] [2022-04-06 16:39:09,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881357080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:09,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:09,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:39:09,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114510622] [2022-04-06 16:39:09,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:09,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:39:09,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:09,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:39:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=419, Unknown=3, NotChecked=132, Total=650 [2022-04-06 16:39:09,663 INFO L87 Difference]: Start difference. First operand 397 states and 516 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 16:39:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:11,206 INFO L93 Difference]: Finished difference Result 409 states and 526 transitions. [2022-04-06 16:39:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 16:39:11,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 157 [2022-04-06 16:39:11,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:11,209 INFO L225 Difference]: With dead ends: 409 [2022-04-06 16:39:11,209 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 16:39:11,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=149, Invalid=616, Unknown=3, NotChecked=162, Total=930 [2022-04-06 16:39:11,210 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 22 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:11,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 282 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 16:39:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 16:39:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 370. [2022-04-06 16:39:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 206 states have (on average 1.1116504854368932) internal successors, (229), 208 states have internal predecessors, (229), 125 states have call successors, (125), 39 states have call predecessors, (125), 38 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2022-04-06 16:39:11,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 477 transitions. [2022-04-06 16:39:11,290 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 477 transitions. Word has length 157 [2022-04-06 16:39:11,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:11,290 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 477 transitions. [2022-04-06 16:39:11,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 16:39:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 477 transitions. [2022-04-06 16:39:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 16:39:11,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:11,292 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-04-06 16:39:11,311 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 16:39:11,507 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 16:39:11,507 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-04-06 16:39:11,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:11,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027185927] [2022-04-06 16:39:11,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:11,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-04-06 16:39:11,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:11,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989026616] [2022-04-06 16:39:11,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:11,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:11,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:11,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953512830] [2022-04-06 16:39:11,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:11,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:11,518 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 16:39:11,519 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 16:39:11,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:11,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:11,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 16:39:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:12,925 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:12,926 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-04-06 16:39:13,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:16,658 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:16,661 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:19,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:19,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989026616] [2022-04-06 16:39:19,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:19,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953512830] [2022-04-06 16:39:19,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953512830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:39:19,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:39:19,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 16:39:19,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:19,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027185927] [2022-04-06 16:39:19,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027185927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:19,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:19,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:39:19,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000307971] [2022-04-06 16:39:19,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:19,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:39:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:39:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:39:19,759 INFO L87 Difference]: Start difference. First operand 370 states and 477 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 16:39:25,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:25,017 INFO L93 Difference]: Finished difference Result 414 states and 538 transitions. [2022-04-06 16:39:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:39:25,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-04-06 16:39:25,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:25,019 INFO L225 Difference]: With dead ends: 414 [2022-04-06 16:39:25,019 INFO L226 Difference]: Without dead ends: 411 [2022-04-06 16:39:25,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 16:39:25,020 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 38 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:25,022 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 381 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 16:39:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-04-06 16:39:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2022-04-06 16:39:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 226 states have (on average 1.1150442477876106) internal successors, (252), 228 states have internal predecessors, (252), 141 states have call successors, (141), 42 states have call predecessors, (141), 41 states have return successors, (139), 138 states have call predecessors, (139), 139 states have call successors, (139) [2022-04-06 16:39:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 532 transitions. [2022-04-06 16:39:25,116 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 532 transitions. Word has length 160 [2022-04-06 16:39:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:25,116 INFO L478 AbstractCegarLoop]: Abstraction has 409 states and 532 transitions. [2022-04-06 16:39:25,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 16:39:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 532 transitions. [2022-04-06 16:39:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 16:39:25,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:25,117 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-04-06 16:39:25,137 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 16:39:25,334 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 16:39:25,335 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:25,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 15 times [2022-04-06 16:39:25,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:25,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783130319] [2022-04-06 16:39:25,335 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1560660366, now seen corresponding path program 16 times [2022-04-06 16:39:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540316869] [2022-04-06 16:39:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:25,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:25,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13802953] [2022-04-06 16:39:25,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:25,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:25,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:25,343 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 16:39:25,344 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 16:39:25,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 16:39:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:26,988 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:26,989 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 177 proven. 122 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2022-04-06 16:39:27,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 202 proven. 12 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2022-04-06 16:39:29,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540316869] [2022-04-06 16:39:29,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:29,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13802953] [2022-04-06 16:39:29,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13802953] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:29,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:29,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-04-06 16:39:29,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:29,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783130319] [2022-04-06 16:39:29,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783130319] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:29,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:29,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:39:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914088382] [2022-04-06 16:39:29,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:29,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:39:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:39:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:39:29,401 INFO L87 Difference]: Start difference. First operand 409 states and 532 transitions. Second operand has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 16:39:33,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:33,605 INFO L93 Difference]: Finished difference Result 458 states and 597 transitions. [2022-04-06 16:39:33,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:39:33,606 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 160 [2022-04-06 16:39:33,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:33,608 INFO L225 Difference]: With dead ends: 458 [2022-04-06 16:39:33,608 INFO L226 Difference]: Without dead ends: 455 [2022-04-06 16:39:33,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:39:33,609 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:33,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 356 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 16:39:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-04-06 16:39:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 452. [2022-04-06 16:39:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 249 states have (on average 1.1164658634538152) internal successors, (278), 251 states have internal predecessors, (278), 157 states have call successors, (157), 46 states have call predecessors, (157), 45 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2022-04-06 16:39:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 590 transitions. [2022-04-06 16:39:33,705 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 590 transitions. Word has length 160 [2022-04-06 16:39:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:33,705 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 590 transitions. [2022-04-06 16:39:33,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-04-06 16:39:33,705 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 590 transitions. [2022-04-06 16:39:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-04-06 16:39:33,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:33,706 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:33,723 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 16:39:33,914 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 16:39:33,915 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 15 times [2022-04-06 16:39:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:33,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1441059620] [2022-04-06 16:39:33,915 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2118008102, now seen corresponding path program 16 times [2022-04-06 16:39:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246574484] [2022-04-06 16:39:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:33,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:33,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:33,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474288117] [2022-04-06 16:39:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:33,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:33,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:33,931 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 16:39:33,940 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 16:39:34,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:34,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:34,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 16:39:34,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 162 proven. 112 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2022-04-06 16:39:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 108 proven. 94 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2022-04-06 16:39:40,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246574484] [2022-04-06 16:39:40,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:40,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474288117] [2022-04-06 16:39:40,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474288117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:40,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:40,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-04-06 16:39:40,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1441059620] [2022-04-06 16:39:40,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1441059620] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:40,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:40,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:39:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962264038] [2022-04-06 16:39:40,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:40,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:39:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:39:40,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 16:39:40,951 INFO L87 Difference]: Start difference. First operand 452 states and 590 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-04-06 16:39:45,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:45,655 INFO L93 Difference]: Finished difference Result 498 states and 645 transitions. [2022-04-06 16:39:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:39:45,655 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) Word has length 174 [2022-04-06 16:39:45,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:45,658 INFO L225 Difference]: With dead ends: 498 [2022-04-06 16:39:45,658 INFO L226 Difference]: Without dead ends: 496 [2022-04-06 16:39:45,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 16:39:45,659 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 53 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:45,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 414 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 16:39:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-06 16:39:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 475. [2022-04-06 16:39:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 265 states have (on average 1.109433962264151) internal successors, (294), 268 states have internal predecessors, (294), 160 states have call successors, (160), 50 states have call predecessors, (160), 49 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2022-04-06 16:39:45,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 612 transitions. [2022-04-06 16:39:45,759 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 612 transitions. Word has length 174 [2022-04-06 16:39:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:45,759 INFO L478 AbstractCegarLoop]: Abstraction has 475 states and 612 transitions. [2022-04-06 16:39:45,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 18 states have internal predecessors, (42), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29) [2022-04-06 16:39:45,759 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 612 transitions. [2022-04-06 16:39:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 16:39:45,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:45,760 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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 16:39:45,776 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 16:39:45,965 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 16:39:45,965 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:45,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1112136673, now seen corresponding path program 17 times [2022-04-06 16:39:45,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:45,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1249448668] [2022-04-06 16:39:45,966 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:45,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1112136673, now seen corresponding path program 18 times [2022-04-06 16:39:45,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:45,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525603803] [2022-04-06 16:39:45,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:45,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:45,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:45,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611080412] [2022-04-06 16:39:45,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:39:45,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:45,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:45,973 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 16:39:45,973 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 16:39:46,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:39:46,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:46,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:39:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2022-04-06 16:39:46,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 131 proven. 10 refuted. 0 times theorem prover too weak. 1069 trivial. 0 not checked. [2022-04-06 16:39:46,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:46,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525603803] [2022-04-06 16:39:46,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611080412] [2022-04-06 16:39:46,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611080412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:46,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:46,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 16:39:46,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1249448668] [2022-04-06 16:39:46,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1249448668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:46,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:46,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:39:46,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414886909] [2022-04-06 16:39:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:46,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:39:46,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:39:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:39:46,721 INFO L87 Difference]: Start difference. First operand 475 states and 612 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-06 16:39:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:47,098 INFO L93 Difference]: Finished difference Result 497 states and 629 transitions. [2022-04-06 16:39:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:39:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 176 [2022-04-06 16:39:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:47,117 INFO L225 Difference]: With dead ends: 497 [2022-04-06 16:39:47,117 INFO L226 Difference]: Without dead ends: 495 [2022-04-06 16:39:47,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:39:47,117 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:47,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 130 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:39:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-04-06 16:39:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 495. [2022-04-06 16:39:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 280 states have (on average 1.1035714285714286) internal successors, (309), 283 states have internal predecessors, (309), 160 states have call successors, (160), 55 states have call predecessors, (160), 54 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2022-04-06 16:39:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 627 transitions. [2022-04-06 16:39:47,225 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 627 transitions. Word has length 176 [2022-04-06 16:39:47,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:47,225 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 627 transitions. [2022-04-06 16:39:47,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-04-06 16:39:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 627 transitions. [2022-04-06 16:39:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 16:39:47,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:47,227 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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 16:39:47,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:47,443 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 16:39:47,443 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:47,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 19 times [2022-04-06 16:39:47,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:47,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885529682] [2022-04-06 16:39:47,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 20 times [2022-04-06 16:39:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:47,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629648872] [2022-04-06 16:39:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:47,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019219454] [2022-04-06 16:39:47,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:47,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:47,455 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 16:39:47,467 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 16:39:47,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:47,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 16:39:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 247 proven. 212 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2022-04-06 16:39:53,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:40:27,659 WARN L232 SmtUtils]: Spent 10.42s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:41:06,707 WARN L232 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 4 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 16:41:51,984 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_426 Int) (v_main_~xy~0_BEFORE_CALL_185 Int) (v_main_~s~0_BEFORE_CALL_523 Int) (v_main_~r~0_BEFORE_CALL_470 Int) (v_main_~x~0_BEFORE_CALL_534 Int) (v_main_~k~0_BEFORE_CALL_339 Int) (v_main_~q~0_BEFORE_CALL_488 Int) (v_main_~y~0_BEFORE_CALL_545 Int) (v_main_~yy~0_BEFORE_CALL_181 Int)) (let ((.cse16 (* v_main_~k~0_BEFORE_CALL_339 v_main_~s~0_BEFORE_CALL_523)) (.cse15 (* (- 1) v_main_~k~0_BEFORE_CALL_339 v_main_~q~0_BEFORE_CALL_488))) (let ((.cse9 (+ (* (- 2) v_main_~p~0_BEFORE_CALL_426) (* (- 2) .cse15) v_main_~q~0_BEFORE_CALL_488)) (.cse10 (+ (* (- 2) v_main_~r~0_BEFORE_CALL_470) (* 2 .cse16) v_main_~s~0_BEFORE_CALL_523))) (let ((.cse7 (* v_main_~y~0_BEFORE_CALL_545 .cse10)) (.cse8 (* .cse9 v_main_~x~0_BEFORE_CALL_534))) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_545 v_main_~r~0_BEFORE_CALL_470)) (.cse1 (* v_main_~p~0_BEFORE_CALL_426 v_main_~x~0_BEFORE_CALL_534)) (.cse4 (* v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse3 (* v_main_~k~0_BEFORE_CALL_339 v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse5 (* v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse2 (* v_main_~k~0_BEFORE_CALL_339 v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse6 (+ .cse7 .cse8))) (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (<= (+ (* .cse0 3) (* .cse1 3)) (+ (* .cse2 3) (* .cse3 3) .cse4 .cse5)) (= (+ (* .cse6 v_main_~y~0_BEFORE_CALL_545) .cse7 .cse8) (+ (* .cse9 v_main_~xy~0_BEFORE_CALL_185) .cse7 (* v_main_~yy~0_BEFORE_CALL_181 .cse10) .cse8)) (not (<= (+ (* 2 .cse0) (* .cse1 2)) (+ .cse4 (* .cse3 2) .cse5 (* .cse2 2)))) (= .cse6 0) (not (let ((.cse13 (+ v_main_~r~0_BEFORE_CALL_470 (* (- 1) .cse16))) (.cse14 (+ v_main_~p~0_BEFORE_CALL_426 .cse15))) (let ((.cse11 (* v_main_~x~0_BEFORE_CALL_534 .cse14)) (.cse12 (* v_main_~y~0_BEFORE_CALL_545 .cse13))) (= (+ (* (+ .cse11 .cse12) v_main_~y~0_BEFORE_CALL_545) .cse11 .cse12) (+ .cse11 (* v_main_~yy~0_BEFORE_CALL_181 .cse13) (* v_main_~xy~0_BEFORE_CALL_185 .cse14) .cse12))))))))))) is different from false [2022-04-06 16:41:53,989 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~p~0_BEFORE_CALL_426 Int) (v_main_~xy~0_BEFORE_CALL_185 Int) (v_main_~s~0_BEFORE_CALL_523 Int) (v_main_~r~0_BEFORE_CALL_470 Int) (v_main_~x~0_BEFORE_CALL_534 Int) (v_main_~k~0_BEFORE_CALL_339 Int) (v_main_~q~0_BEFORE_CALL_488 Int) (v_main_~y~0_BEFORE_CALL_545 Int) (v_main_~yy~0_BEFORE_CALL_181 Int)) (let ((.cse16 (* v_main_~k~0_BEFORE_CALL_339 v_main_~s~0_BEFORE_CALL_523)) (.cse15 (* (- 1) v_main_~k~0_BEFORE_CALL_339 v_main_~q~0_BEFORE_CALL_488))) (let ((.cse9 (+ (* (- 2) v_main_~p~0_BEFORE_CALL_426) (* (- 2) .cse15) v_main_~q~0_BEFORE_CALL_488)) (.cse10 (+ (* (- 2) v_main_~r~0_BEFORE_CALL_470) (* 2 .cse16) v_main_~s~0_BEFORE_CALL_523))) (let ((.cse7 (* v_main_~y~0_BEFORE_CALL_545 .cse10)) (.cse8 (* .cse9 v_main_~x~0_BEFORE_CALL_534))) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_545 v_main_~r~0_BEFORE_CALL_470)) (.cse1 (* v_main_~p~0_BEFORE_CALL_426 v_main_~x~0_BEFORE_CALL_534)) (.cse4 (* v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse3 (* v_main_~k~0_BEFORE_CALL_339 v_main_~x~0_BEFORE_CALL_534 v_main_~q~0_BEFORE_CALL_488)) (.cse5 (* v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse2 (* v_main_~k~0_BEFORE_CALL_339 v_main_~y~0_BEFORE_CALL_545 v_main_~s~0_BEFORE_CALL_523)) (.cse6 (+ .cse7 .cse8))) (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (<= (+ (* .cse0 3) (* .cse1 3)) (+ (* .cse2 3) (* .cse3 3) .cse4 .cse5)) (= (+ (* .cse6 v_main_~y~0_BEFORE_CALL_545) .cse7 .cse8) (+ (* .cse9 v_main_~xy~0_BEFORE_CALL_185) .cse7 (* v_main_~yy~0_BEFORE_CALL_181 .cse10) .cse8)) (not (<= (+ (* 2 .cse0) (* .cse1 2)) (+ .cse4 (* .cse3 2) .cse5 (* .cse2 2)))) (= .cse6 0) (not (let ((.cse13 (+ v_main_~r~0_BEFORE_CALL_470 (* (- 1) .cse16))) (.cse14 (+ v_main_~p~0_BEFORE_CALL_426 .cse15))) (let ((.cse11 (* v_main_~x~0_BEFORE_CALL_534 .cse14)) (.cse12 (* v_main_~y~0_BEFORE_CALL_545 .cse13))) (= (+ (* (+ .cse11 .cse12) v_main_~y~0_BEFORE_CALL_545) .cse11 .cse12) (+ .cse11 (* v_main_~yy~0_BEFORE_CALL_181 .cse13) (* v_main_~xy~0_BEFORE_CALL_185 .cse14) .cse12))))))))))) is different from true [2022-04-06 16:41:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 305 proven. 87 refuted. 11 times theorem prover too weak. 803 trivial. 4 not checked. [2022-04-06 16:41:55,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:41:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629648872] [2022-04-06 16:41:55,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:41:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019219454] [2022-04-06 16:41:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019219454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:41:55,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:41:55,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 36 [2022-04-06 16:41:55,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:41:55,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885529682] [2022-04-06 16:41:55,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885529682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:41:55,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:41:55,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:41:55,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601386012] [2022-04-06 16:41:55,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:41:55,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:41:55,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:41:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:41:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=940, Unknown=2, NotChecked=66, Total=1260 [2022-04-06 16:41:55,046 INFO L87 Difference]: Start difference. First operand 495 states and 627 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-06 16:42:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:01,724 INFO L93 Difference]: Finished difference Result 508 states and 638 transitions. [2022-04-06 16:42:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:42:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 176 [2022-04-06 16:42:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:01,727 INFO L225 Difference]: With dead ends: 508 [2022-04-06 16:42:01,727 INFO L226 Difference]: Without dead ends: 506 [2022-04-06 16:42:01,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 313 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=353, Invalid=1455, Unknown=2, NotChecked=82, Total=1892 [2022-04-06 16:42:01,728 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 47 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:01,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 354 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-06 16:42:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-04-06 16:42:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 503. [2022-04-06 16:42:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 286 states have (on average 1.1013986013986015) internal successors, (315), 289 states have internal predecessors, (315), 160 states have call successors, (160), 57 states have call predecessors, (160), 56 states have return successors, (158), 156 states have call predecessors, (158), 158 states have call successors, (158) [2022-04-06 16:42:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 633 transitions. [2022-04-06 16:42:01,851 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 633 transitions. Word has length 176 [2022-04-06 16:42:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:01,851 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 633 transitions. [2022-04-06 16:42:01,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 19 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-04-06 16:42:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 633 transitions. [2022-04-06 16:42:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 16:42:01,852 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:01,852 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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 16:42:01,871 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 16:42:02,067 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 16:42:02,067 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1787962463, now seen corresponding path program 21 times [2022-04-06 16:42:02,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:02,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1866107601] [2022-04-06 16:42:02,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1787962463, now seen corresponding path program 22 times [2022-04-06 16:42:02,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:02,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271629391] [2022-04-06 16:42:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:02,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:02,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:02,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047600501] [2022-04-06 16:42:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:42:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:02,091 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 16:42:02,092 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 16:42:02,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:42:02,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:42:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 16:42:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:42:03,570 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:03,571 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:04,886 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:04,887 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:42:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 251 proven. 157 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-04-06 16:42:06,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:42:39,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:42:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271629391] [2022-04-06 16:42:39,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:42:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047600501] [2022-04-06 16:42:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047600501] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:42:39,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:42:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:42:39,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:42:39,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1866107601] [2022-04-06 16:42:39,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1866107601] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:42:39,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:42:39,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:42:39,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270221171] [2022-04-06 16:42:39,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:42:39,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:42:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:42:39,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=572, Unknown=11, NotChecked=0, Total=756 [2022-04-06 16:42:39,434 INFO L87 Difference]: Start difference. First operand 503 states and 633 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 16:42:45,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:42:45,130 INFO L93 Difference]: Finished difference Result 584 states and 740 transitions. [2022-04-06 16:42:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:42:45,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) Word has length 176 [2022-04-06 16:42:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:42:45,134 INFO L225 Difference]: With dead ends: 584 [2022-04-06 16:42:45,134 INFO L226 Difference]: Without dead ends: 582 [2022-04-06 16:42:45,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=228, Invalid=816, Unknown=12, NotChecked=0, Total=1056 [2022-04-06 16:42:45,135 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 31 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:42:45,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 410 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 16:42:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-04-06 16:42:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 579. [2022-04-06 16:42:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 327 states have (on average 1.1039755351681957) internal successors, (361), 330 states have internal predecessors, (361), 188 states have call successors, (188), 64 states have call predecessors, (188), 63 states have return successors, (186), 184 states have call predecessors, (186), 186 states have call successors, (186) [2022-04-06 16:42:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 735 transitions. [2022-04-06 16:42:45,293 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 735 transitions. Word has length 176 [2022-04-06 16:42:45,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:42:45,293 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 735 transitions. [2022-04-06 16:42:45,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 11 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2022-04-06 16:42:45,293 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 735 transitions. [2022-04-06 16:42:45,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 16:42:45,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:42:45,294 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:42:45,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 16:42:45,511 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 16:42:45,511 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:42:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:42:45,511 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 23 times [2022-04-06 16:42:45,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:42:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [969429906] [2022-04-06 16:42:45,512 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:42:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 24 times [2022-04-06 16:42:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:42:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851877618] [2022-04-06 16:42:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:42:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:42:45,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:42:45,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340912069] [2022-04-06 16:42:45,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:42:45,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:42:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:42:45,526 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 16:42:45,556 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 16:43:02,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:43:02,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 16:43:02,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 180 proven. 38 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2022-04-06 16:43:07,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:08,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:08,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851877618] [2022-04-06 16:43:08,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:08,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340912069] [2022-04-06 16:43:08,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340912069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:43:08,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:43:08,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:43:08,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:08,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [969429906] [2022-04-06 16:43:08,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [969429906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:08,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:08,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:43:08,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835905048] [2022-04-06 16:43:08,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:08,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:43:08,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:43:08,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:43:08,044 INFO L87 Difference]: Start difference. First operand 579 states and 735 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:43:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:17,272 INFO L93 Difference]: Finished difference Result 619 states and 785 transitions. [2022-04-06 16:43:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 16:43:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) Word has length 179 [2022-04-06 16:43:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:17,275 INFO L225 Difference]: With dead ends: 619 [2022-04-06 16:43:17,275 INFO L226 Difference]: Without dead ends: 617 [2022-04-06 16:43:17,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:43:17,276 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:17,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 228 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 754 Invalid, 0 Unknown, 77 Unchecked, 3.8s Time] [2022-04-06 16:43:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-04-06 16:43:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 613. [2022-04-06 16:43:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 345 states have (on average 1.1043478260869566) internal successors, (381), 348 states have internal predecessors, (381), 200 states have call successors, (200), 68 states have call predecessors, (200), 67 states have return successors, (198), 196 states have call predecessors, (198), 198 states have call successors, (198) [2022-04-06 16:43:17,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 779 transitions. [2022-04-06 16:43:17,418 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 779 transitions. Word has length 179 [2022-04-06 16:43:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:17,418 INFO L478 AbstractCegarLoop]: Abstraction has 613 states and 779 transitions. [2022-04-06 16:43:17,418 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:43:17,418 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 779 transitions. [2022-04-06 16:43:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 16:43:17,420 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:17,420 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2022-04-06 16:43:17,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 16:43:17,626 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 16:43:17,627 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 17 times [2022-04-06 16:43:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [545339860] [2022-04-06 16:43:17,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2078525035, now seen corresponding path program 18 times [2022-04-06 16:43:17,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:17,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514103389] [2022-04-06 16:43:17,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:17,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:17,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778055247] [2022-04-06 16:43:17,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:43:17,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:17,639 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 16:43:17,640 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 16:43:17,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:43:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 16:43:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 107 proven. 63 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2022-04-06 16:43:19,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:43:19,530 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:19,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514103389] [2022-04-06 16:43:19,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778055247] [2022-04-06 16:43:19,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778055247] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:43:19,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:43:19,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 16:43:19,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:43:19,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [545339860] [2022-04-06 16:43:19,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [545339860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:43:19,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:43:19,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:43:19,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851947714] [2022-04-06 16:43:19,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:43:19,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:43:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:43:19,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:43:19,705 INFO L87 Difference]: Start difference. First operand 613 states and 779 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 16:43:20,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:43:20,935 INFO L93 Difference]: Finished difference Result 622 states and 787 transitions. [2022-04-06 16:43:20,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:43:20,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 182 [2022-04-06 16:43:20,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:43:20,953 INFO L225 Difference]: With dead ends: 622 [2022-04-06 16:43:20,953 INFO L226 Difference]: Without dead ends: 619 [2022-04-06 16:43:20,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:43:20,954 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 16:43:20,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 256 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 16:43:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-04-06 16:43:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 596. [2022-04-06 16:43:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 336 states have (on average 1.1011904761904763) internal successors, (370), 338 states have internal predecessors, (370), 193 states have call successors, (193), 67 states have call predecessors, (193), 66 states have return successors, (191), 190 states have call predecessors, (191), 191 states have call successors, (191) [2022-04-06 16:43:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 754 transitions. [2022-04-06 16:43:21,089 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 754 transitions. Word has length 182 [2022-04-06 16:43:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:43:21,090 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 754 transitions. [2022-04-06 16:43:21,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 16:43:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 754 transitions. [2022-04-06 16:43:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 16:43:21,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:43:21,091 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 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] [2022-04-06 16:43:21,113 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 16:43:21,295 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 16:43:21,295 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:43:21,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:43:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 19 times [2022-04-06 16:43:21,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:43:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1939439340] [2022-04-06 16:43:21,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:43:21,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 20 times [2022-04-06 16:43:21,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:43:21,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625565943] [2022-04-06 16:43:21,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:43:21,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:43:21,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:43:21,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641334841] [2022-04-06 16:43:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:43:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:43:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:43:21,305 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 16:43:21,306 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 16:43:21,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:43:21,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:43:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 16:43:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:43:22,096 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:22,098 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,971 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,973 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,974 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,978 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,983 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,994 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:26,996 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:27,494 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:27,809 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:33,005 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:43:33,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:43:33,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625565943] [2022-04-06 16:43:33,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:43:33,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641334841] [2022-04-06 16:43:33,154 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-04-06 16:43:33,154 ERROR L250 FreeRefinementEngine]: Caught unknown exception: Infinite/NaN value [2022-04-06 16:43:33,154 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-04-06 16:43:33,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 16:43:33,368 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 16:43:33,369 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:467) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1663) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1448) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1378) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.convertApplicationTerm(Substitution.java:53) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.apply(Substitution.java:59) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:400) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:111) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:129) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$LiveVariablesPostprocessorForward.postprocess(TraceCheckSpWp.java:539) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.runStrategy(AcceleratedInterpolationCore.java:300) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:203) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-04-06 16:43:33,374 INFO L158 Benchmark]: Toolchain (without parser) took 699206.12ms. Allocated memory is still 184.5MB. Free memory was 136.5MB in the beginning and 132.0MB in the end (delta: 4.4MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-04-06 16:43:33,374 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 152.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 16:43:33,374 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.06ms. Allocated memory is still 184.5MB. Free memory was 136.3MB in the beginning and 163.2MB in the end (delta: -26.9MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-04-06 16:43:33,377 INFO L158 Benchmark]: Boogie Preprocessor took 21.74ms. Allocated memory is still 184.5MB. Free memory was 163.2MB in the beginning and 161.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 16:43:33,380 INFO L158 Benchmark]: RCFGBuilder took 225.85ms. Allocated memory is still 184.5MB. Free memory was 161.4MB in the beginning and 150.3MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 16:43:33,380 INFO L158 Benchmark]: TraceAbstraction took 698786.30ms. Allocated memory is still 184.5MB. Free memory was 149.6MB in the beginning and 132.0MB in the end (delta: 17.6MB). Peak memory consumption was 19.4MB. Max. memory is 8.0GB. [2022-04-06 16:43:33,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 152.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 169.06ms. Allocated memory is still 184.5MB. Free memory was 136.3MB in the beginning and 163.2MB in the end (delta: -26.9MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.74ms. Allocated memory is still 184.5MB. Free memory was 163.2MB in the beginning and 161.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 225.85ms. Allocated memory is still 184.5MB. Free memory was 161.4MB in the beginning and 150.3MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 698786.30ms. Allocated memory is still 184.5MB. Free memory was 149.6MB in the beginning and 132.0MB in the end (delta: 17.6MB). Peak memory consumption was 19.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:467) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-06 16:43:33,597 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-04-06 16:43:33,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...