/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 19:39:44,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 19:39:44,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 19:39:44,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 19:39:44,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 19:39:44,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 19:39:44,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 19:39:44,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 19:39:44,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 19:39:44,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 19:39:44,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 19:39:44,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 19:39:44,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 19:39:44,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 19:39:44,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 19:39:44,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 19:39:44,338 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 19:39:44,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 19:39:44,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 19:39:44,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 19:39:44,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-02-14 19:39:44,360 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 19:39:44,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 19:39:44,361 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 19:39:44,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 19:39:44,362 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 19:39:44,362 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 19:39:44,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 19:39:44,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 19:39:44,362 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 19:39:44,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 19:39:44,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 19:39:44,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 19:39:44,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 19:39:44,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 19:39:44,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 19:39:44,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 19:39:44,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 19:39:44,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 19:39:44,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 19:39:44,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 19:39:44,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 19:39:44,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 19:39:44,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 19:39:44,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 19:39:44,368 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 19:39:44,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 19:39:44,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 19:39:44,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 19:39:44,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 19:39:44,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 19:39:44,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 19:39:44,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 19:39:44,612 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 19:39:44,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2022-02-14 19:39:44,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c197369/b4b0b530cf1e4830aa9cb86534e9d4c4/FLAG09dae6c52 [2022-02-14 19:39:44,982 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 19:39:44,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2022-02-14 19:39:44,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c197369/b4b0b530cf1e4830aa9cb86534e9d4c4/FLAG09dae6c52 [2022-02-14 19:39:45,425 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9c197369/b4b0b530cf1e4830aa9cb86534e9d4c4 [2022-02-14 19:39:45,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 19:39:45,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 19:39:45,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 19:39:45,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 19:39:45,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 19:39:45,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16820eb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45, skipping insertion in model container [2022-02-14 19:39:45,438 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 19:39:45,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 19:39:45,566 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/ps6-ll_valuebound50.c[458,471] [2022-02-14 19:39:45,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 19:39:45,607 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 19:39:45,615 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/ps6-ll_valuebound50.c[458,471] [2022-02-14 19:39:45,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 19:39:45,629 INFO L208 MainTranslator]: Completed translation [2022-02-14 19:39:45,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45 WrapperNode [2022-02-14 19:39:45,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 19:39:45,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 19:39:45,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 19:39:45,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 19:39:45,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,646 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 19:39:45,663 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 19:39:45,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 19:39:45,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 19:39:45,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (1/1) ... [2022-02-14 19:39:45,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 19:39:45,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:45,741 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) [2022-02-14 19:39:45,763 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 [2022-02-14 19:39:45,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 19:39:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 19:39:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 19:39:45,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 19:39:45,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 19:39:45,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 19:39:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 19:39:45,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 19:39:45,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 19:39:45,833 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 19:39:45,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 19:39:45,918 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 19:39:45,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 19:39:45,922 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 19:39:45,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 07:39:45 BoogieIcfgContainer [2022-02-14 19:39:45,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 19:39:45,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 19:39:45,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 19:39:45,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 19:39:45,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 07:39:45" (1/3) ... [2022-02-14 19:39:45,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6206dd5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 07:39:45, skipping insertion in model container [2022-02-14 19:39:45,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 07:39:45" (2/3) ... [2022-02-14 19:39:45,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6206dd5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 07:39:45, skipping insertion in model container [2022-02-14 19:39:45,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 07:39:45" (3/3) ... [2022-02-14 19:39:45,944 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.c [2022-02-14 19:39:45,949 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 19:39:45,949 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 19:39:45,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 19:39:45,994 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 19:39:45,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 19:39:46,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 19:39:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 19:39:46,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:46,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:46,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2022-02-14 19:39:46,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:46,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972138918] [2022-02-14 19:39:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:46,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:46,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 19:39:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 19:39:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:46,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-14 19:39:46,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 19:39:46,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:46,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972138918] [2022-02-14 19:39:46,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972138918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 19:39:46,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 19:39:46,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 19:39:46,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9169696] [2022-02-14 19:39:46,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:39:46,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 19:39:46,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 19:39:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 19:39:46,172 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 19:39:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:46,258 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-02-14 19:39:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 19:39:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-14 19:39:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:46,265 INFO L225 Difference]: With dead ends: 51 [2022-02-14 19:39:46,265 INFO L226 Difference]: Without dead ends: 24 [2022-02-14 19:39:46,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 19:39:46,270 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:46,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:39:46,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-14 19:39:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-14 19:39:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 19:39:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-14 19:39:46,296 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-02-14 19:39:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:46,297 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-14 19:39:46,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 19:39:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-14 19:39:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 19:39:46,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:46,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:46,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 19:39:46,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:46,299 INFO L85 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2022-02-14 19:39:46,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:46,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833688445] [2022-02-14 19:39:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:46,315 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:46,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624144847] [2022-02-14 19:39:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:46,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:46,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:46,317 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) [2022-02-14 19:39:46,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 19:39:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:46,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 19:39:46,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 19:39:46,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 19:39:46,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:46,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833688445] [2022-02-14 19:39:46,520 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:46,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624144847] [2022-02-14 19:39:46,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624144847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 19:39:46,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 19:39:46,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 19:39:46,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245514661] [2022-02-14 19:39:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:39:46,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 19:39:46,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:46,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 19:39:46,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 19:39:46,523 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 19:39:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:46,584 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-02-14 19:39:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 19:39:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-02-14 19:39:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:46,585 INFO L225 Difference]: With dead ends: 35 [2022-02-14 19:39:46,585 INFO L226 Difference]: Without dead ends: 31 [2022-02-14 19:39:46,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 19:39:46,587 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:46,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:39:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-14 19:39:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-14 19:39:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 19:39:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-14 19:39:46,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2022-02-14 19:39:46,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:46,595 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-14 19:39:46,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-02-14 19:39:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-14 19:39:46,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 19:39:46,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:46,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:46,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 19:39:46,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:46,798 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:46,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:46,799 INFO L85 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2022-02-14 19:39:46,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:46,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710140178] [2022-02-14 19:39:46,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:46,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:46,811 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:46,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69346261] [2022-02-14 19:39:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:46,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:46,813 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) [2022-02-14 19:39:46,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 19:39:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:46,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-14 19:39:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 19:39:46,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-14 19:39:47,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:47,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710140178] [2022-02-14 19:39:47,301 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:47,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69346261] [2022-02-14 19:39:47,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69346261] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 19:39:47,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:39:47,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-14 19:39:47,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630269896] [2022-02-14 19:39:47,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 19:39:47,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 19:39:47,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 19:39:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-14 19:39:47,307 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 19:39:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:47,347 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-02-14 19:39:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 19:39:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-14 19:39:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:47,349 INFO L225 Difference]: With dead ends: 37 [2022-02-14 19:39:47,349 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 19:39:47,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 19:39:47,354 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:47,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:39:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 19:39:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-14 19:39:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 19:39:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-02-14 19:39:47,370 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2022-02-14 19:39:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:47,370 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-02-14 19:39:47,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 19:39:47,371 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-02-14 19:39:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-14 19:39:47,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:47,374 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:47,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 19:39:47,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 19:39:47,580 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2022-02-14 19:39:47,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:47,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620512946] [2022-02-14 19:39:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:47,591 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:47,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251957014] [2022-02-14 19:39:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:47,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:47,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:47,593 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) [2022-02-14 19:39:47,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 19:39:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:39:47,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 19:39:47,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 19:39:47,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:48,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:48,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620512946] [2022-02-14 19:39:48,017 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:48,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251957014] [2022-02-14 19:39:48,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251957014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:39:48,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:39:48,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-14 19:39:48,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614020390] [2022-02-14 19:39:48,017 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:39:48,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 19:39:48,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 19:39:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-14 19:39:48,019 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-14 19:39:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:48,072 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-14 19:39:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 19:39:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2022-02-14 19:39:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:48,073 INFO L225 Difference]: With dead ends: 42 [2022-02-14 19:39:48,073 INFO L226 Difference]: Without dead ends: 36 [2022-02-14 19:39:48,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 19:39:48,074 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:48,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:39:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-14 19:39:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-14 19:39:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-14 19:39:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-02-14 19:39:48,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 40 [2022-02-14 19:39:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:48,080 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-02-14 19:39:48,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-02-14 19:39:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-14 19:39:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 19:39:48,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:48,081 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:48,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 19:39:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:48,296 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:48,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2022-02-14 19:39:48,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:48,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448650632] [2022-02-14 19:39:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:48,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:48,310 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:48,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332858822] [2022-02-14 19:39:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 19:39:48,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:48,314 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) [2022-02-14 19:39:48,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 19:39:48,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 19:39:48,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:39:48,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-14 19:39:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-14 19:39:48,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:48,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:48,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448650632] [2022-02-14 19:39:48,673 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:48,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332858822] [2022-02-14 19:39:48,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332858822] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:39:48,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:39:48,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-14 19:39:48,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744842888] [2022-02-14 19:39:48,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:39:48,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 19:39:48,674 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:48,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 19:39:48,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-14 19:39:48,674 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-14 19:39:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:48,736 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-02-14 19:39:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 19:39:48,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2022-02-14 19:39:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:48,737 INFO L225 Difference]: With dead ends: 45 [2022-02-14 19:39:48,737 INFO L226 Difference]: Without dead ends: 39 [2022-02-14 19:39:48,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-14 19:39:48,738 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:48,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 195 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:39:48,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-14 19:39:48,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-02-14 19:39:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 19:39:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-02-14 19:39:48,744 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 47 [2022-02-14 19:39:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:48,744 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-02-14 19:39:48,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-02-14 19:39:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-02-14 19:39:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-14 19:39:48,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:48,745 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:48,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 19:39:48,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:48,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2022-02-14 19:39:48,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:48,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246703346] [2022-02-14 19:39:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:48,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:48,970 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:48,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580905878] [2022-02-14 19:39:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 19:39:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:48,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:48,972 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) [2022-02-14 19:39:48,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 19:39:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 19:39:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:39:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 19:39:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-02-14 19:39:49,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:49,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:49,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246703346] [2022-02-14 19:39:49,417 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:49,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580905878] [2022-02-14 19:39:49,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580905878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:39:49,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:39:49,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 19:39:49,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622444736] [2022-02-14 19:39:49,417 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:39:49,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 19:39:49,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:49,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 19:39:49,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 19:39:49,418 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-02-14 19:39:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:49,501 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-02-14 19:39:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 19:39:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2022-02-14 19:39:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:49,503 INFO L225 Difference]: With dead ends: 48 [2022-02-14 19:39:49,503 INFO L226 Difference]: Without dead ends: 42 [2022-02-14 19:39:49,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-14 19:39:49,503 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:49,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 19:39:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-14 19:39:49,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-14 19:39:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-14 19:39:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-02-14 19:39:49,510 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 54 [2022-02-14 19:39:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:49,510 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-02-14 19:39:49,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-02-14 19:39:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-02-14 19:39:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-14 19:39:49,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:49,526 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:49,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-14 19:39:49,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:49,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:49,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 4 times [2022-02-14 19:39:49,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:49,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459648986] [2022-02-14 19:39:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:49,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:49,749 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:49,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088867147] [2022-02-14 19:39:49,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 19:39:49,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:49,760 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) [2022-02-14 19:39:49,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 19:39:49,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 19:39:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:39:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-14 19:39:49,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-14 19:39:49,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:50,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:50,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459648986] [2022-02-14 19:39:50,102 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:50,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088867147] [2022-02-14 19:39:50,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088867147] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:39:50,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:39:50,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-14 19:39:50,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026913060] [2022-02-14 19:39:50,103 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:39:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 19:39:50,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 19:39:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-14 19:39:50,104 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-02-14 19:39:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:50,195 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2022-02-14 19:39:50,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 19:39:50,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-02-14 19:39:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:50,196 INFO L225 Difference]: With dead ends: 51 [2022-02-14 19:39:50,196 INFO L226 Difference]: Without dead ends: 45 [2022-02-14 19:39:50,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-14 19:39:50,197 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:50,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 287 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 19:39:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-14 19:39:50,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-14 19:39:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 19:39:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-02-14 19:39:50,203 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2022-02-14 19:39:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-02-14 19:39:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-02-14 19:39:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-02-14 19:39:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-14 19:39:50,204 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:50,204 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:50,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 19:39:50,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:50,405 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 5 times [2022-02-14 19:39:50,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:50,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755269202] [2022-02-14 19:39:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:50,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:50,413 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:50,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677924717] [2022-02-14 19:39:50,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 19:39:50,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:50,414 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) [2022-02-14 19:39:50,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 19:39:50,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-14 19:39:50,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:39:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-14 19:39:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-14 19:39:51,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:51,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:39:51,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755269202] [2022-02-14 19:39:51,281 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:39:51,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677924717] [2022-02-14 19:39:51,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677924717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:39:51,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:39:51,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-14 19:39:51,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197686340] [2022-02-14 19:39:51,282 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:39:51,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 19:39:51,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:39:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 19:39:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-14 19:39:51,284 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-02-14 19:39:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:39:51,401 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-02-14 19:39:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 19:39:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2022-02-14 19:39:51,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:39:51,402 INFO L225 Difference]: With dead ends: 54 [2022-02-14 19:39:51,402 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 19:39:51,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-14 19:39:51,403 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 19:39:51,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 339 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 19:39:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 19:39:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-14 19:39:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 19:39:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-02-14 19:39:51,409 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 68 [2022-02-14 19:39:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:39:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-02-14 19:39:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-02-14 19:39:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-02-14 19:39:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-14 19:39:51,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:39:51,410 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:39:51,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 19:39:51,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:51,616 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:39:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:39:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 6 times [2022-02-14 19:39:51,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:39:51,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536107667] [2022-02-14 19:39:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:39:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:39:51,623 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:39:51,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794553626] [2022-02-14 19:39:51,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 19:39:51,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:39:51,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:39:51,625 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) [2022-02-14 19:39:51,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 19:39:51,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-14 19:39:51,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:39:51,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-14 19:39:51,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:39:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 47 proven. 68 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-02-14 19:39:52,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:39:56,526 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* (- 18) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse1 (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* (- 119) c_main_~y~0 c_main_~y~0)) (.cse3 (* (- 65) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ .cse0 .cse1 .cse2 (* (- 120) c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse3) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse4 (+ c_main_~y~0 1))) (= (* .cse4 .cse4) (* main_~k~0 .cse4))))) (not (<= (+ (* 10 (* c_main_~y~0 c_main_~y~0)) (* 5 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1) (div (+ .cse0 .cse1 .cse2 (- 12) .cse3) (- 12)))))) is different from false [2022-02-14 19:40:00,599 WARN L838 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* (- 2) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 5) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0)))))) is different from false [2022-02-14 19:40:00,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:40:00,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536107667] [2022-02-14 19:40:00,601 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:40:00,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794553626] [2022-02-14 19:40:00,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794553626] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:40:00,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:40:00,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-14 19:40:00,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090629234] [2022-02-14 19:40:00,602 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:40:00,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 19:40:00,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:40:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 19:40:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=326, Unknown=2, NotChecked=74, Total=462 [2022-02-14 19:40:00,603 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-14 19:40:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:40:00,808 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-02-14 19:40:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 19:40:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2022-02-14 19:40:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:40:00,809 INFO L225 Difference]: With dead ends: 57 [2022-02-14 19:40:00,809 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 19:40:00,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=81, Invalid=431, Unknown=2, NotChecked=86, Total=600 [2022-02-14 19:40:00,810 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 19:40:00,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 19:40:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 19:40:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-14 19:40:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 19:40:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-02-14 19:40:00,820 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 75 [2022-02-14 19:40:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:40:00,821 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-02-14 19:40:00,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 10 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-02-14 19:40:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-02-14 19:40:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-14 19:40:00,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:40:00,822 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:40:00,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 19:40:01,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-14 19:40:01,032 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:40:01,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:40:01,032 INFO L85 PathProgramCache]: Analyzing trace with hash 615143773, now seen corresponding path program 7 times [2022-02-14 19:40:01,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:40:01,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301952367] [2022-02-14 19:40:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:40:01,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:40:01,042 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:40:01,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513007071] [2022-02-14 19:40:01,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-14 19:40:01,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:40:01,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:40:01,048 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) [2022-02-14 19:40:01,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 19:41:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 19:41:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-14 19:41:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:41:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-02-14 19:41:17,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:41:17,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:41:17,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301952367] [2022-02-14 19:41:17,361 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:41:17,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513007071] [2022-02-14 19:41:17,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513007071] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:41:17,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:41:17,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-14 19:41:17,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966077161] [2022-02-14 19:41:17,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:41:17,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-14 19:41:17,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:41:17,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-14 19:41:17,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-02-14 19:41:17,362 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-02-14 19:41:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:41:17,513 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-02-14 19:41:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 19:41:17,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2022-02-14 19:41:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:41:17,515 INFO L225 Difference]: With dead ends: 60 [2022-02-14 19:41:17,515 INFO L226 Difference]: Without dead ends: 54 [2022-02-14 19:41:17,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-14 19:41:17,515 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 2 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 19:41:17,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 455 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 19:41:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-14 19:41:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-14 19:41:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 19:41:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-02-14 19:41:17,522 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 82 [2022-02-14 19:41:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:41:17,523 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-02-14 19:41:17,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-02-14 19:41:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-02-14 19:41:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-14 19:41:17,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:41:17,524 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:41:17,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 19:41:17,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 19:41:17,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:41:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:41:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1334355539, now seen corresponding path program 8 times [2022-02-14 19:41:17,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:41:17,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530432056] [2022-02-14 19:41:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:41:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:41:17,747 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:41:17,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96283032] [2022-02-14 19:41:17,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 19:41:17,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:41:17,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:41:17,752 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) [2022-02-14 19:41:17,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 19:41:18,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 19:41:18,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:41:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-14 19:41:18,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:41:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-14 19:41:18,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:41:19,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:41:19,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530432056] [2022-02-14 19:41:19,265 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:41:19,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96283032] [2022-02-14 19:41:19,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96283032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:41:19,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:41:19,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-02-14 19:41:19,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233897464] [2022-02-14 19:41:19,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:41:19,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-14 19:41:19,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:41:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-14 19:41:19,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-02-14 19:41:19,266 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-02-14 19:41:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:41:19,444 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-02-14 19:41:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-14 19:41:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2022-02-14 19:41:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:41:19,445 INFO L225 Difference]: With dead ends: 63 [2022-02-14 19:41:19,445 INFO L226 Difference]: Without dead ends: 57 [2022-02-14 19:41:19,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-02-14 19:41:19,446 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 19:41:19,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 519 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 19:41:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-14 19:41:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-14 19:41:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-14 19:41:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-02-14 19:41:19,452 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 89 [2022-02-14 19:41:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:41:19,453 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-02-14 19:41:19,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-02-14 19:41:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-02-14 19:41:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-14 19:41:19,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:41:19,453 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:41:19,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-14 19:41:19,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 19:41:19,659 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:41:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:41:19,659 INFO L85 PathProgramCache]: Analyzing trace with hash 711483229, now seen corresponding path program 9 times [2022-02-14 19:41:19,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:41:19,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826721208] [2022-02-14 19:41:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:41:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:41:19,666 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:41:19,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955928727] [2022-02-14 19:41:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 19:41:19,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:41:19,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:41:19,668 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) [2022-02-14 19:41:19,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 19:41:25,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-14 19:41:25,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:41:25,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-14 19:41:25,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:41:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-02-14 19:41:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:41:26,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:41:26,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826721208] [2022-02-14 19:41:26,111 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:41:26,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955928727] [2022-02-14 19:41:26,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955928727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:41:26,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:41:26,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-14 19:41:26,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386390530] [2022-02-14 19:41:26,112 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:41:26,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 19:41:26,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:41:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 19:41:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-14 19:41:26,113 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-14 19:41:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:41:26,317 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-02-14 19:41:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-14 19:41:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 96 [2022-02-14 19:41:26,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:41:26,318 INFO L225 Difference]: With dead ends: 66 [2022-02-14 19:41:26,318 INFO L226 Difference]: Without dead ends: 60 [2022-02-14 19:41:26,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-14 19:41:26,319 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 19:41:26,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 587 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 19:41:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-14 19:41:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-14 19:41:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-14 19:41:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-02-14 19:41:26,333 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 96 [2022-02-14 19:41:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:41:26,333 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-02-14 19:41:26,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-14 19:41:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-02-14 19:41:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-14 19:41:26,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:41:26,334 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:41:26,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 19:41:26,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-14 19:41:26,548 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:41:26,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:41:26,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1610181715, now seen corresponding path program 10 times [2022-02-14 19:41:26,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:41:26,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516806081] [2022-02-14 19:41:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:41:26,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:41:26,567 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:41:26,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079495059] [2022-02-14 19:41:26,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 19:41:26,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:41:26,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:41:26,568 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) [2022-02-14 19:41:26,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 19:41:26,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 19:41:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:41:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-14 19:41:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:41:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-02-14 19:41:26,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:41:27,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:41:27,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516806081] [2022-02-14 19:41:27,106 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:41:27,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079495059] [2022-02-14 19:41:27,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079495059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:41:27,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:41:27,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-14 19:41:27,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775865724] [2022-02-14 19:41:27,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:41:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-14 19:41:27,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:41:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-14 19:41:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-14 19:41:27,108 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-02-14 19:41:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:41:27,330 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-02-14 19:41:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-14 19:41:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 103 [2022-02-14 19:41:27,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:41:27,331 INFO L225 Difference]: With dead ends: 69 [2022-02-14 19:41:27,331 INFO L226 Difference]: Without dead ends: 63 [2022-02-14 19:41:27,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-14 19:41:27,332 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 2 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 19:41:27,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 659 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 19:41:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-14 19:41:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-14 19:41:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 19:41:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-02-14 19:41:27,338 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 103 [2022-02-14 19:41:27,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:41:27,338 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-02-14 19:41:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-02-14 19:41:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-02-14 19:41:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-14 19:41:27,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:41:27,339 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:41:27,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-14 19:41:27,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 19:41:27,557 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:41:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:41:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1881400669, now seen corresponding path program 11 times [2022-02-14 19:41:27,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:41:27,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605810745] [2022-02-14 19:41:27,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:41:27,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:41:27,564 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:41:27,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46046044] [2022-02-14 19:41:27,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 19:41:27,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:41:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:41:27,565 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) [2022-02-14 19:41:27,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 19:41:50,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-14 19:41:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 19:41:50,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-14 19:41:50,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 19:41:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 26 proven. 198 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-02-14 19:41:51,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 19:41:51,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 19:41:51,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605810745] [2022-02-14 19:41:51,205 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 19:41:51,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46046044] [2022-02-14 19:41:51,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46046044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 19:41:51,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 19:41:51,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-02-14 19:41:51,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602572742] [2022-02-14 19:41:51,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 19:41:51,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-14 19:41:51,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 19:41:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-14 19:41:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-14 19:41:51,207 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-02-14 19:41:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 19:41:51,459 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-02-14 19:41:51,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 19:41:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 110 [2022-02-14 19:41:51,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 19:41:51,460 INFO L225 Difference]: With dead ends: 72 [2022-02-14 19:41:51,460 INFO L226 Difference]: Without dead ends: 66 [2022-02-14 19:41:51,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-14 19:41:51,461 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 19:41:51,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 735 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 19:41:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-14 19:41:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-02-14 19:41:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-14 19:41:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-02-14 19:41:51,472 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 110 [2022-02-14 19:41:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 19:41:51,472 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-02-14 19:41:51,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-02-14 19:41:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-02-14 19:41:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-14 19:41:51,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 19:41:51,474 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 19:41:51,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-14 19:41:51,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 19:41:51,687 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 19:41:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 19:41:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1600671149, now seen corresponding path program 12 times [2022-02-14 19:41:51,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 19:41:51,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626363448] [2022-02-14 19:41:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 19:41:51,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 19:41:51,694 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 19:41:51,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767455125] [2022-02-14 19:41:51,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 19:41:51,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 19:41:51,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 19:41:51,696 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) [2022-02-14 19:41:51,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process