/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:34:45,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:34:45,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:34:45,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:34:45,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:34:45,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:34:45,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:34:45,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:34:45,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:34:45,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:34:45,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:34:45,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:34:45,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:34:45,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:34:45,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:34:45,699 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:34:45,702 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:34:45,711 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 [2023-03-31 00:34:45,729 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:34:45,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:34:45,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:34:45,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:34:45,730 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:34:45,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:34:45,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:34:45,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:34:45,731 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:34:45,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:34:45,732 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:34:45,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:34:45,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:34:45,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:34:45,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:34:45,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:34:45,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:34:45,733 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:34:45,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:34:45,733 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:34:45,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:34:45,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:34:45,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:34:45,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:34:45,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:34:45,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:34:45,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:34:45,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:34:45,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:34:45,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:34:45,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:34:45,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:34:45,735 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:34:45,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:34:45,736 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:34:45,736 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:34:45,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:34:45,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:34:45,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:34:45,923 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:34:45,923 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:34:45,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-03-31 00:34:47,057 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:34:47,224 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:34:47,225 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2023-03-31 00:34:47,230 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad1ef17b/8056070c74e44625aa5942067d02567b/FLAGdb2c2b54f [2023-03-31 00:34:47,242 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ad1ef17b/8056070c74e44625aa5942067d02567b [2023-03-31 00:34:47,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:34:47,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:34:47,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:34:47,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:34:47,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:34:47,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,250 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65881d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47, skipping insertion in model container [2023-03-31 00:34:47,250 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:34:47,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:34:47,375 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2023-03-31 00:34:47,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:34:47,407 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:34:47,420 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2023-03-31 00:34:47,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:34:47,451 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:34:47,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47 WrapperNode [2023-03-31 00:34:47,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:34:47,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:34:47,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:34:47,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:34:47,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,474 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:34:47,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:34:47,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:34:47,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:34:47,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (1/1) ... [2023-03-31 00:34:47,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:34:47,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:47,506 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) [2023-03-31 00:34:47,512 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 [2023-03-31 00:34:47,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:34:47,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:34:47,533 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:34:47,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:34:47,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:34:47,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:34:47,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:34:47,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:34:47,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:34:47,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:34:47,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:34:47,534 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:34:47,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:34:47,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:34:47,588 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:34:47,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:34:47,734 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:34:47,740 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:34:47,740 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 00:34:47,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:34:47 BoogieIcfgContainer [2023-03-31 00:34:47,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:34:47,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:34:47,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:34:47,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:34:47,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:34:47" (1/3) ... [2023-03-31 00:34:47,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367b3a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:34:47, skipping insertion in model container [2023-03-31 00:34:47,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:34:47" (2/3) ... [2023-03-31 00:34:47,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@367b3a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:34:47, skipping insertion in model container [2023-03-31 00:34:47,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:34:47" (3/3) ... [2023-03-31 00:34:47,759 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2023-03-31 00:34:47,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:34:47,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:34:47,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:34:47,826 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@793d9e45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:34:47,826 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:34:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 00:34:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 00:34:47,834 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:47,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:47,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:47,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2023-03-31 00:34:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:47,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744578981] [2023-03-31 00:34:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:47,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:47,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:47,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744578981] [2023-03-31 00:34:47,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:34:47,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930322413] [2023-03-31 00:34:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:47,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:47,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:47,953 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) [2023-03-31 00:34:47,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:34:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:48,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:34:48,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:34:48,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:34:48,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930322413] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:34:48,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:34:48,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:34:48,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961076393] [2023-03-31 00:34:48,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:48,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:34:48,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:48,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:34:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:34:48,144 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:48,161 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2023-03-31 00:34:48,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:34:48,170 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 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 [2023-03-31 00:34:48,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:48,176 INFO L225 Difference]: With dead ends: 73 [2023-03-31 00:34:48,176 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:34:48,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:34:48,186 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:48,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:34:48,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:34:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 00:34:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:34:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-03-31 00:34:48,227 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2023-03-31 00:34:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:48,227 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-03-31 00:34:48,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-03-31 00:34:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 00:34:48,229 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:48,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:48,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:48,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 00:34:48,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:48,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:48,435 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2023-03-31 00:34:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:48,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979031625] [2023-03-31 00:34:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:48,471 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:48,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428046372] [2023-03-31 00:34:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:48,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:48,480 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) [2023-03-31 00:34:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:34:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:48,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:34:48,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:48,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:34:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979031625] [2023-03-31 00:34:48,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428046372] [2023-03-31 00:34:48,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428046372] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:34:48,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:34:48,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:34:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171083718] [2023-03-31 00:34:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:34:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:48,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:34:48,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:34:48,612 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:48,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:48,629 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2023-03-31 00:34:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:34:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-03-31 00:34:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:48,630 INFO L225 Difference]: With dead ends: 44 [2023-03-31 00:34:48,630 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 00:34:48,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:34:48,631 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:48,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:34:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 00:34:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-03-31 00:34:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:34:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-03-31 00:34:48,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2023-03-31 00:34:48,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:48,641 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-03-31 00:34:48,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-03-31 00:34:48,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 00:34:48,642 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:48,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:48,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:48,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 00:34:48,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:48,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2023-03-31 00:34:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338084702] [2023-03-31 00:34:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:48,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:48,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665402166] [2023-03-31 00:34:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:48,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:48,874 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) [2023-03-31 00:34:48,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:34:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:48,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:34:48,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:34:48,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:34:48,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338084702] [2023-03-31 00:34:48,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665402166] [2023-03-31 00:34:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665402166] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:34:48,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:34:48,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:34:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160410438] [2023-03-31 00:34:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:34:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:34:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:34:48,964 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:34:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:49,038 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2023-03-31 00:34:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:34:49,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-03-31 00:34:49,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:49,039 INFO L225 Difference]: With dead ends: 57 [2023-03-31 00:34:49,039 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 00:34:49,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:34:49,041 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:49,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 136 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:34:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 00:34:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2023-03-31 00:34:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:34:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-03-31 00:34:49,049 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2023-03-31 00:34:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:49,050 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-03-31 00:34:49,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 00:34:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-03-31 00:34:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 00:34:49,051 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:49,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:49,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 00:34:49,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:49,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:49,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2023-03-31 00:34:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923791254] [2023-03-31 00:34:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:49,296 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:49,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307059182] [2023-03-31 00:34:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:49,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:49,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:49,300 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) [2023-03-31 00:34:49,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:34:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:49,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:34:49,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:49,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:34:49,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923791254] [2023-03-31 00:34:49,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:49,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307059182] [2023-03-31 00:34:49,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307059182] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:34:49,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:34:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:34:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590868812] [2023-03-31 00:34:49,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:49,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:34:49,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:34:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:34:49,461 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:49,490 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2023-03-31 00:34:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:34:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-03-31 00:34:49,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:49,495 INFO L225 Difference]: With dead ends: 62 [2023-03-31 00:34:49,495 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 00:34:49,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:34:49,498 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:49,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:34:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 00:34:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-03-31 00:34:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:34:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2023-03-31 00:34:49,505 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2023-03-31 00:34:49,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:49,505 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2023-03-31 00:34:49,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2023-03-31 00:34:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 00:34:49,506 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:49,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:49,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:49,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:49,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:49,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 795698770, now seen corresponding path program 1 times [2023-03-31 00:34:49,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:49,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087687635] [2023-03-31 00:34:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:49,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:49,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39730001] [2023-03-31 00:34:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:49,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:49,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:49,746 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) [2023-03-31 00:34:49,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:34:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:49,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2023-03-31 00:34:49,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:34:49,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:34:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087687635] [2023-03-31 00:34:49,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:49,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39730001] [2023-03-31 00:34:49,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39730001] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:34:49,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:34:49,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 00:34:49,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088497566] [2023-03-31 00:34:49,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:49,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:34:49,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:34:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:34:49,999 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:50,084 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2023-03-31 00:34:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:34:50,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-03-31 00:34:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:50,086 INFO L225 Difference]: With dead ends: 58 [2023-03-31 00:34:50,086 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 00:34:50,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:34:50,087 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:50,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 192 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:50,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 00:34:50,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-03-31 00:34:50,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-03-31 00:34:50,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2023-03-31 00:34:50,098 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2023-03-31 00:34:50,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:50,098 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2023-03-31 00:34:50,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:50,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2023-03-31 00:34:50,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 00:34:50,099 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:50,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:50,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:50,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:50,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:50,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2023-03-31 00:34:50,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:50,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095498019] [2023-03-31 00:34:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:50,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984731778] [2023-03-31 00:34:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:50,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:50,320 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) [2023-03-31 00:34:50,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:34:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:50,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 00:34:50,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:50,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:50,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095498019] [2023-03-31 00:34:50,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984731778] [2023-03-31 00:34:50,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984731778] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:34:50,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:34:50,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-03-31 00:34:50,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924343661] [2023-03-31 00:34:50,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:34:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:34:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:34:50,498 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:34:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:50,634 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2023-03-31 00:34:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:34:50,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2023-03-31 00:34:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:50,638 INFO L225 Difference]: With dead ends: 151 [2023-03-31 00:34:50,638 INFO L226 Difference]: Without dead ends: 144 [2023-03-31 00:34:50,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:34:50,642 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 97 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:50,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 229 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-03-31 00:34:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2023-03-31 00:34:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-31 00:34:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2023-03-31 00:34:50,680 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2023-03-31 00:34:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:50,681 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2023-03-31 00:34:50,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:34:50,682 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2023-03-31 00:34:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 00:34:50,687 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:50,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:50,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:50,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:50,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:50,895 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2023-03-31 00:34:50,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:50,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510071644] [2023-03-31 00:34:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:50,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1488483536] [2023-03-31 00:34:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:50,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:50,908 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) [2023-03-31 00:34:50,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:34:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:50,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 00:34:50,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:34:51,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:34:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:51,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510071644] [2023-03-31 00:34:51,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:51,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488483536] [2023-03-31 00:34:51,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488483536] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:34:51,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:34:51,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-03-31 00:34:51,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653855891] [2023-03-31 00:34:51,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:51,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:34:51,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:51,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:34:51,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:34:51,093 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:51,311 INFO L93 Difference]: Finished difference Result 187 states and 265 transitions. [2023-03-31 00:34:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:34:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 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 31 [2023-03-31 00:34:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:51,313 INFO L225 Difference]: With dead ends: 187 [2023-03-31 00:34:51,313 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 00:34:51,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:34:51,315 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 122 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:51,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 255 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 00:34:51,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2023-03-31 00:34:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 00:34:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2023-03-31 00:34:51,345 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2023-03-31 00:34:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:51,345 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2023-03-31 00:34:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2023-03-31 00:34:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 00:34:51,347 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:51,347 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:51,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:51,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:51,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:51,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash 495607521, now seen corresponding path program 1 times [2023-03-31 00:34:51,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:51,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24796021] [2023-03-31 00:34:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:51,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:51,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:51,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049160664] [2023-03-31 00:34:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:51,567 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) [2023-03-31 00:34:51,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:34:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:51,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-31 00:34:51,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:34:51,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:51,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:51,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24796021] [2023-03-31 00:34:51,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:51,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049160664] [2023-03-31 00:34:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049160664] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:34:51,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:34:51,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-03-31 00:34:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873439301] [2023-03-31 00:34:51,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:51,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:34:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:34:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:34:51,853 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:34:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:51,968 INFO L93 Difference]: Finished difference Result 147 states and 194 transitions. [2023-03-31 00:34:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:34:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-03-31 00:34:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:51,970 INFO L225 Difference]: With dead ends: 147 [2023-03-31 00:34:51,970 INFO L226 Difference]: Without dead ends: 145 [2023-03-31 00:34:51,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:34:51,971 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:51,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 175 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-03-31 00:34:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-03-31 00:34:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 00:34:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2023-03-31 00:34:51,989 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2023-03-31 00:34:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:51,989 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2023-03-31 00:34:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:34:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2023-03-31 00:34:51,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:34:51,992 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:51,992 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:52,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:52,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 00:34:52,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:52,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2023-03-31 00:34:52,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:52,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626192244] [2023-03-31 00:34:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:52,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:52,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:52,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001329617] [2023-03-31 00:34:52,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:52,224 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) [2023-03-31 00:34:52,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:34:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:52,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 00:34:52,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:34:52,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:52,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:52,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626192244] [2023-03-31 00:34:52,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:52,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001329617] [2023-03-31 00:34:52,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001329617] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:34:52,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:34:52,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-03-31 00:34:52,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625284798] [2023-03-31 00:34:52,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:52,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:34:52,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:52,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:34:52,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:34:52,553 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:34:52,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:52,817 INFO L93 Difference]: Finished difference Result 187 states and 255 transitions. [2023-03-31 00:34:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:34:52,818 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-03-31 00:34:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:52,821 INFO L225 Difference]: With dead ends: 187 [2023-03-31 00:34:52,821 INFO L226 Difference]: Without dead ends: 185 [2023-03-31 00:34:52,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-03-31 00:34:52,823 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:52,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 388 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:34:52,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-03-31 00:34:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 174. [2023-03-31 00:34:52,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-03-31 00:34:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2023-03-31 00:34:52,847 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2023-03-31 00:34:52,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:52,847 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2023-03-31 00:34:52,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 11 states have internal predecessors, (46), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:34:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2023-03-31 00:34:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:34:52,848 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:52,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:52,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:53,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:53,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:53,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:53,060 INFO L85 PathProgramCache]: Analyzing trace with hash -892181054, now seen corresponding path program 1 times [2023-03-31 00:34:53,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:53,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648566605] [2023-03-31 00:34:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:53,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:53,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816692934] [2023-03-31 00:34:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:53,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:53,077 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) [2023-03-31 00:34:53,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:34:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:53,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 00:34:53,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:53,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:34:53,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:53,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648566605] [2023-03-31 00:34:53,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:53,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816692934] [2023-03-31 00:34:53,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816692934] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:34:53,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:34:53,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:34:53,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421975846] [2023-03-31 00:34:53,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:53,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:34:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:34:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:34:53,182 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:53,238 INFO L93 Difference]: Finished difference Result 241 states and 329 transitions. [2023-03-31 00:34:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:34:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-03-31 00:34:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:53,240 INFO L225 Difference]: With dead ends: 241 [2023-03-31 00:34:53,240 INFO L226 Difference]: Without dead ends: 174 [2023-03-31 00:34:53,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:34:53,244 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:53,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 139 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:34:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-03-31 00:34:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2023-03-31 00:34:53,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-03-31 00:34:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2023-03-31 00:34:53,268 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2023-03-31 00:34:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:53,269 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2023-03-31 00:34:53,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:34:53,269 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2023-03-31 00:34:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-31 00:34:53,269 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:53,269 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:53,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:53,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 00:34:53,475 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:53,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:53,476 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2023-03-31 00:34:53,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:53,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004750010] [2023-03-31 00:34:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:53,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:53,495 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714835773] [2023-03-31 00:34:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:53,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:53,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:53,498 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) [2023-03-31 00:34:53,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 00:34:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:53,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2023-03-31 00:34:53,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:34:53,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:57,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004750010] [2023-03-31 00:34:57,826 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714835773] [2023-03-31 00:34:57,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714835773] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:34:57,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:34:57,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-03-31 00:34:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765180381] [2023-03-31 00:34:57,826 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 00:34:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 00:34:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-03-31 00:34:57,828 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:34:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:58,036 INFO L93 Difference]: Finished difference Result 196 states and 262 transitions. [2023-03-31 00:34:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 00:34:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-03-31 00:34:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:58,037 INFO L225 Difference]: With dead ends: 196 [2023-03-31 00:34:58,037 INFO L226 Difference]: Without dead ends: 194 [2023-03-31 00:34:58,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-03-31 00:34:58,038 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:58,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 215 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-03-31 00:34:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2023-03-31 00:34:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 141 states have internal predecessors, (185), 37 states have call successors, (37), 16 states have call predecessors, (37), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-03-31 00:34:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 257 transitions. [2023-03-31 00:34:58,061 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 257 transitions. Word has length 39 [2023-03-31 00:34:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:58,061 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 257 transitions. [2023-03-31 00:34:58,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:34:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 257 transitions. [2023-03-31 00:34:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 00:34:58,062 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:58,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:58,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-31 00:34:58,268 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:58,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2023-03-31 00:34:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:58,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656843247] [2023-03-31 00:34:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:58,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:58,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130510839] [2023-03-31 00:34:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:58,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:58,289 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) [2023-03-31 00:34:58,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 00:34:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:58,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 00:34:58,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:34:58,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656843247] [2023-03-31 00:34:58,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130510839] [2023-03-31 00:34:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130510839] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:34:58,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:34:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 00:34:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726733738] [2023-03-31 00:34:58,539 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:34:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:34:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:34:58,540 INFO L87 Difference]: Start difference. First operand 193 states and 257 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:34:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:58,736 INFO L93 Difference]: Finished difference Result 201 states and 264 transitions. [2023-03-31 00:34:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:34:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-03-31 00:34:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:58,738 INFO L225 Difference]: With dead ends: 201 [2023-03-31 00:34:58,738 INFO L226 Difference]: Without dead ends: 199 [2023-03-31 00:34:58,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-03-31 00:34:58,739 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:58,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 277 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-03-31 00:34:58,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2023-03-31 00:34:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 143 states have (on average 1.3146853146853146) internal successors, (188), 144 states have internal predecessors, (188), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-03-31 00:34:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 260 transitions. [2023-03-31 00:34:58,766 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 260 transitions. Word has length 41 [2023-03-31 00:34:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:58,766 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 260 transitions. [2023-03-31 00:34:58,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:34:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 260 transitions. [2023-03-31 00:34:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 00:34:58,767 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:58,767 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:58,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 00:34:58,973 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:58,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2023-03-31 00:34:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890748533] [2023-03-31 00:34:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:58,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:58,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723740974] [2023-03-31 00:34:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:58,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:58,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:58,990 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) [2023-03-31 00:34:58,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-03-31 00:34:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:59,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 00:34:59,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 00:34:59,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 00:34:59,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:59,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890748533] [2023-03-31 00:34:59,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:59,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723740974] [2023-03-31 00:34:59,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723740974] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 00:34:59,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:34:59,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-03-31 00:34:59,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749890833] [2023-03-31 00:34:59,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:34:59,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:34:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:59,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:34:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:34:59,265 INFO L87 Difference]: Start difference. First operand 197 states and 260 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 00:34:59,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:59,330 INFO L93 Difference]: Finished difference Result 214 states and 282 transitions. [2023-03-31 00:34:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:34:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-03-31 00:34:59,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:59,332 INFO L225 Difference]: With dead ends: 214 [2023-03-31 00:34:59,332 INFO L226 Difference]: Without dead ends: 212 [2023-03-31 00:34:59,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:34:59,332 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:59,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 146 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:34:59,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-03-31 00:34:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 201. [2023-03-31 00:34:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 147 states have internal predecessors, (189), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2023-03-31 00:34:59,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 261 transitions. [2023-03-31 00:34:59,357 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 261 transitions. Word has length 44 [2023-03-31 00:34:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:34:59,357 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 261 transitions. [2023-03-31 00:34:59,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 00:34:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 261 transitions. [2023-03-31 00:34:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 00:34:59,358 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:34:59,358 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:34:59,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-03-31 00:34:59,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 00:34:59,564 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:34:59,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:34:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1018638220, now seen corresponding path program 1 times [2023-03-31 00:34:59,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:34:59,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668282652] [2023-03-31 00:34:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:59,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:34:59,582 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:34:59,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608897153] [2023-03-31 00:34:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:34:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:34:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:34:59,589 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) [2023-03-31 00:34:59,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-03-31 00:34:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:34:59,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 00:34:59,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:34:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:34:59,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:34:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 00:34:59,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:34:59,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668282652] [2023-03-31 00:34:59,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:34:59,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608897153] [2023-03-31 00:34:59,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608897153] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:34:59,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:34:59,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-03-31 00:34:59,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911370065] [2023-03-31 00:34:59,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:34:59,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 00:34:59,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:34:59,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 00:34:59,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:34:59,778 INFO L87 Difference]: Start difference. First operand 201 states and 261 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:34:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:34:59,983 INFO L93 Difference]: Finished difference Result 531 states and 701 transitions. [2023-03-31 00:34:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:34:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2023-03-31 00:34:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:34:59,986 INFO L225 Difference]: With dead ends: 531 [2023-03-31 00:34:59,986 INFO L226 Difference]: Without dead ends: 451 [2023-03-31 00:34:59,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:34:59,988 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 134 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:34:59,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 243 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:34:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-03-31 00:35:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 423. [2023-03-31 00:35:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 300 states have (on average 1.2666666666666666) internal successors, (380), 304 states have internal predecessors, (380), 84 states have call successors, (84), 39 states have call predecessors, (84), 38 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-03-31 00:35:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 543 transitions. [2023-03-31 00:35:00,074 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 543 transitions. Word has length 42 [2023-03-31 00:35:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:35:00,074 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 543 transitions. [2023-03-31 00:35:00,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:35:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 543 transitions. [2023-03-31 00:35:00,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 00:35:00,075 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:35:00,075 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:35:00,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-03-31 00:35:00,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:00,280 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:35:00,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:35:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash -26453774, now seen corresponding path program 2 times [2023-03-31 00:35:00,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:35:00,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063536258] [2023-03-31 00:35:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:00,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:35:00,297 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:35:00,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245658339] [2023-03-31 00:35:00,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:35:00,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:00,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:35:00,302 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:35:00,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-03-31 00:35:00,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:35:00,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:35:00,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:35:00,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:35:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:35:00,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:35:00,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:35:00,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063536258] [2023-03-31 00:35:00,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:35:00,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245658339] [2023-03-31 00:35:00,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245658339] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:35:00,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:35:00,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:35:00,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128817898] [2023-03-31 00:35:00,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:35:00,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:35:00,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:35:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:35:00,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:35:00,383 INFO L87 Difference]: Start difference. First operand 423 states and 543 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2023-03-31 00:35:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:35:00,535 INFO L93 Difference]: Finished difference Result 598 states and 810 transitions. [2023-03-31 00:35:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:35:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 43 [2023-03-31 00:35:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:35:00,539 INFO L225 Difference]: With dead ends: 598 [2023-03-31 00:35:00,539 INFO L226 Difference]: Without dead ends: 505 [2023-03-31 00:35:00,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:35:00,541 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:35:00,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 165 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:35:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-03-31 00:35:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 423. [2023-03-31 00:35:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 304 states have (on average 1.2730263157894737) internal successors, (387), 308 states have internal predecessors, (387), 80 states have call successors, (80), 39 states have call predecessors, (80), 38 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2023-03-31 00:35:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 542 transitions. [2023-03-31 00:35:00,610 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 542 transitions. Word has length 43 [2023-03-31 00:35:00,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:35:00,610 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 542 transitions. [2023-03-31 00:35:00,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2023-03-31 00:35:00,610 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 542 transitions. [2023-03-31 00:35:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 00:35:00,611 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:35:00,611 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:35:00,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-03-31 00:35:00,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-03-31 00:35:00,816 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:35:00,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:35:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2064241646, now seen corresponding path program 1 times [2023-03-31 00:35:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:35:00,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931961254] [2023-03-31 00:35:00,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:00,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:35:00,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:35:00,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818513998] [2023-03-31 00:35:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:00,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:00,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:35:00,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:35:00,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-03-31 00:35:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:35:00,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 00:35:00,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:35:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:35:00,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:35:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 00:35:01,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:35:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931961254] [2023-03-31 00:35:01,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:35:01,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818513998] [2023-03-31 00:35:01,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818513998] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:35:01,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:35:01,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 00:35:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066057373] [2023-03-31 00:35:01,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:35:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:35:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:35:01,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:35:01,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:35:01,044 INFO L87 Difference]: Start difference. First operand 423 states and 542 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:35:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:35:01,369 INFO L93 Difference]: Finished difference Result 878 states and 1137 transitions. [2023-03-31 00:35:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 00:35:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-03-31 00:35:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:35:01,372 INFO L225 Difference]: With dead ends: 878 [2023-03-31 00:35:01,372 INFO L226 Difference]: Without dead ends: 643 [2023-03-31 00:35:01,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2023-03-31 00:35:01,373 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 197 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:35:01,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 267 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:35:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-03-31 00:35:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 608. [2023-03-31 00:35:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 437 states have (on average 1.242562929061785) internal successors, (543), 443 states have internal predecessors, (543), 118 states have call successors, (118), 53 states have call predecessors, (118), 52 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-03-31 00:35:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 772 transitions. [2023-03-31 00:35:01,452 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 772 transitions. Word has length 43 [2023-03-31 00:35:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:35:01,453 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 772 transitions. [2023-03-31 00:35:01,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-03-31 00:35:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 772 transitions. [2023-03-31 00:35:01,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-03-31 00:35:01,453 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:35:01,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:35:01,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-03-31 00:35:01,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-03-31 00:35:01,659 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:35:01,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:35:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2023-03-31 00:35:01,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:35:01,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323074159] [2023-03-31 00:35:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:01,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:35:01,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:35:01,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632124611] [2023-03-31 00:35:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:01,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:35:01,670 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:35:01,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-03-31 00:35:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:35:01,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 00:35:01,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:35:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 00:35:01,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:35:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 00:35:01,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:35:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323074159] [2023-03-31 00:35:01,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:35:01,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632124611] [2023-03-31 00:35:01,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632124611] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 00:35:01,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:35:01,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-03-31 00:35:01,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421649179] [2023-03-31 00:35:01,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:35:01,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:35:01,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:35:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:35:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:35:01,877 INFO L87 Difference]: Start difference. First operand 608 states and 772 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:35:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:35:02,030 INFO L93 Difference]: Finished difference Result 718 states and 931 transitions. [2023-03-31 00:35:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:35:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2023-03-31 00:35:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:35:02,034 INFO L225 Difference]: With dead ends: 718 [2023-03-31 00:35:02,034 INFO L226 Difference]: Without dead ends: 716 [2023-03-31 00:35:02,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:35:02,035 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:35:02,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 168 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:35:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-03-31 00:35:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 701. [2023-03-31 00:35:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 492 states have (on average 1.2520325203252032) internal successors, (616), 498 states have internal predecessors, (616), 150 states have call successors, (150), 59 states have call predecessors, (150), 58 states have return successors, (143), 143 states have call predecessors, (143), 143 states have call successors, (143) [2023-03-31 00:35:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 909 transitions. [2023-03-31 00:35:02,128 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 909 transitions. Word has length 46 [2023-03-31 00:35:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:35:02,128 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 909 transitions. [2023-03-31 00:35:02,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:35:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 909 transitions. [2023-03-31 00:35:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-03-31 00:35:02,129 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:35:02,129 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:35:02,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-03-31 00:35:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-03-31 00:35:02,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:35:02,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:35:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2023-03-31 00:35:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:35:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520905454] [2023-03-31 00:35:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:02,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:35:02,353 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:35:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375698739] [2023-03-31 00:35:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:02,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:02,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:35:02,354 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:35:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-03-31 00:35:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:35:02,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-31 00:35:02,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:35:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 00:35:03,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:35:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-03-31 00:35:03,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:35:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520905454] [2023-03-31 00:35:03,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:35:03,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375698739] [2023-03-31 00:35:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375698739] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:35:03,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:35:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-03-31 00:35:03,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215884205] [2023-03-31 00:35:03,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:35:03,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 00:35:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:35:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 00:35:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:35:03,956 INFO L87 Difference]: Start difference. First operand 701 states and 909 transitions. Second operand has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-31 00:35:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:35:13,978 INFO L93 Difference]: Finished difference Result 1275 states and 1688 transitions. [2023-03-31 00:35:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-03-31 00:35:13,978 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 58 [2023-03-31 00:35:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:35:13,984 INFO L225 Difference]: With dead ends: 1275 [2023-03-31 00:35:13,984 INFO L226 Difference]: Without dead ends: 988 [2023-03-31 00:35:13,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2023-03-31 00:35:13,986 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 296 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:35:13,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 583 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-03-31 00:35:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2023-03-31 00:35:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 844. [2023-03-31 00:35:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 606 states have (on average 1.2541254125412542) internal successors, (760), 610 states have internal predecessors, (760), 172 states have call successors, (172), 66 states have call predecessors, (172), 65 states have return successors, (167), 167 states have call predecessors, (167), 167 states have call successors, (167) [2023-03-31 00:35:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1099 transitions. [2023-03-31 00:35:14,229 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1099 transitions. Word has length 58 [2023-03-31 00:35:14,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:35:14,229 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1099 transitions. [2023-03-31 00:35:14,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-31 00:35:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1099 transitions. [2023-03-31 00:35:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 00:35:14,230 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:35:14,230 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:35:14,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-03-31 00:35:14,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-03-31 00:35:14,436 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:35:14,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:35:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 1 times [2023-03-31 00:35:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:35:14,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571263267] [2023-03-31 00:35:14,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:14,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:35:14,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:35:14,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748832236] [2023-03-31 00:35:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:14,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:35:14,449 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:35:14,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-03-31 00:35:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:35:14,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:35:14,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:35:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 00:35:14,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:35:14,768 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 00:35:14,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:35:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571263267] [2023-03-31 00:35:14,769 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:35:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748832236] [2023-03-31 00:35:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748832236] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:35:14,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:35:14,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-03-31 00:35:14,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916591647] [2023-03-31 00:35:14,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:35:14,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-03-31 00:35:14,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:35:14,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-03-31 00:35:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-03-31 00:35:14,770 INFO L87 Difference]: Start difference. First operand 844 states and 1099 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 00:35:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:35:15,505 INFO L93 Difference]: Finished difference Result 1875 states and 2570 transitions. [2023-03-31 00:35:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-31 00:35:15,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2023-03-31 00:35:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:35:15,512 INFO L225 Difference]: With dead ends: 1875 [2023-03-31 00:35:15,512 INFO L226 Difference]: Without dead ends: 1853 [2023-03-31 00:35:15,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2023-03-31 00:35:15,513 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 283 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:35:15,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 354 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:35:15,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2023-03-31 00:35:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1754. [2023-03-31 00:35:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1281 states have (on average 1.2818110850897737) internal successors, (1642), 1301 states have internal predecessors, (1642), 367 states have call successors, (367), 106 states have call predecessors, (367), 105 states have return successors, (359), 346 states have call predecessors, (359), 359 states have call successors, (359) [2023-03-31 00:35:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2368 transitions. [2023-03-31 00:35:15,937 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2368 transitions. Word has length 64 [2023-03-31 00:35:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:35:15,937 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 2368 transitions. [2023-03-31 00:35:15,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 00:35:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2368 transitions. [2023-03-31 00:35:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 00:35:15,938 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:35:15,939 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:35:15,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-03-31 00:35:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:16,144 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:35:16,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:35:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2023-03-31 00:35:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:35:16,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578291230] [2023-03-31 00:35:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:35:16,151 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:35:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11309677] [2023-03-31 00:35:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:35:16,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:35:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:35:16,153 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:35:16,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-03-31 00:35:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:35:16,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 00:35:16,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:35:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-03-31 00:35:17,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:35:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 00:35:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:35:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578291230] [2023-03-31 00:35:17,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:35:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11309677] [2023-03-31 00:35:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11309677] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:35:17,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:35:17,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2023-03-31 00:35:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273375567] [2023-03-31 00:35:17,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:35:17,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 00:35:17,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:35:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 00:35:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:35:17,545 INFO L87 Difference]: Start difference. First operand 1754 states and 2368 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 19 states have internal predecessors, (77), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-03-31 00:35:37,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []