/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/divbin2_unwindbound1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:29:57,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:29:57,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:29:57,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:29:57,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:29:57,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:29:57,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:29:57,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:29:57,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:29:57,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:29:57,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:29:57,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:29:57,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:29:57,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:29:57,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:29:57,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:29:57,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:29:57,122 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 00:29:57,144 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:29:57,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:29:57,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:29:57,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:29:57,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:29:57,146 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:29:57,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:29:57,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:29:57,146 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:29:57,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:29:57,147 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:29:57,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:29:57,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:29:57,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:29:57,149 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:29:57,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:29:57,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:29:57,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:29:57,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:29:57,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:29:57,326 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:29:57,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound1.i [2023-03-31 00:29:58,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:29:58,407 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:29:58,407 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound1.i [2023-03-31 00:29:58,411 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862d45fc9/db1038643ae146cdadc5c07e67e5537a/FLAG218eda0f4 [2023-03-31 00:29:58,421 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/862d45fc9/db1038643ae146cdadc5c07e67e5537a [2023-03-31 00:29:58,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:29:58,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:29:58,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:29:58,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:29:58,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:29:58,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2981fb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58, skipping insertion in model container [2023-03-31 00:29:58,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:29:58,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:29:58,559 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/divbin2_unwindbound1.i[951,964] [2023-03-31 00:29:58,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:29:58,578 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:29:58,586 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/divbin2_unwindbound1.i[951,964] [2023-03-31 00:29:58,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:29:58,601 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:29:58,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58 WrapperNode [2023-03-31 00:29:58,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:29:58,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:29:58,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:29:58,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:29:58,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,619 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:29:58,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:29:58,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:29:58,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:29:58,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (1/1) ... [2023-03-31 00:29:58,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:29:58,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:29:58,641 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 00:29:58,650 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 00:29:58,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:29:58,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:29:58,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:29:58,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:29:58,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:29:58,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:29:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:29:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:29:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 00:29:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:29:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:29:58,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:29:58,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:29:58,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:29:58,731 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:29:58,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:29:58,844 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:29:58,848 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:29:58,848 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 00:29:58,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:29:58 BoogieIcfgContainer [2023-03-31 00:29:58,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:29:58,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:29:58,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:29:58,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:29:58,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:29:58" (1/3) ... [2023-03-31 00:29:58,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb490bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:29:58, skipping insertion in model container [2023-03-31 00:29:58,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:29:58" (2/3) ... [2023-03-31 00:29:58,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb490bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:29:58, skipping insertion in model container [2023-03-31 00:29:58,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:29:58" (3/3) ... [2023-03-31 00:29:58,855 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound1.i [2023-03-31 00:29:58,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:29:58,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:29:58,926 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:29:58,932 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;@5bbfde, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:29:58,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:29:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:29:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 00:29:58,941 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:29:58,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:29:58,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:29:58,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:29:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2023-03-31 00:29:58,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:29:58,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477504977] [2023-03-31 00:29:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:29:58,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:29:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:29:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:29:59,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477504977] [2023-03-31 00:29:59,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:29:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368730990] [2023-03-31 00:29:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:29:59,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:29:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:29:59,102 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 00:29:59,133 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 00:29:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:29:59,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:29:59,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:29:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:29:59,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:29:59,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368730990] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:29:59,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:29:59,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:29:59,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264460953] [2023-03-31 00:29:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:29:59,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:29:59,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:29:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:29:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:29:59,253 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:29:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:29:59,275 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-03-31 00:29:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:29:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 00:29:59,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:29:59,282 INFO L225 Difference]: With dead ends: 43 [2023-03-31 00:29:59,282 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 00:29:59,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 00:29:59,288 INFO L413 NwaCegarLoop]: 31 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, 31 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 00:29:59,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:29:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 00:29:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 00:29:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:29:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-03-31 00:29:59,321 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2023-03-31 00:29:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:29:59,322 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-03-31 00:29:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:29:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-03-31 00:29:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 00:29:59,322 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:29:59,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:29:59,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 00:29:59,525 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 00:29:59,525 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:29:59,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:29:59,526 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2023-03-31 00:29:59,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:29:59,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075280344] [2023-03-31 00:29:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:29:59,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:29:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:29:59,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:29:59,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075280344] [2023-03-31 00:29:59,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:29:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097060085] [2023-03-31 00:29:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:29:59,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:29:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:29:59,561 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 00:29:59,562 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 00:29:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:29:59,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:29:59,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:29:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:29:59,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:29:59,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097060085] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:29:59,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:29:59,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:29:59,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17855652] [2023-03-31 00:29:59,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:29:59,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:29:59,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:29:59,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:29:59,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:29:59,685 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:29:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:29:59,696 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-03-31 00:29:59,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:29:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 00:29:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:29:59,698 INFO L225 Difference]: With dead ends: 35 [2023-03-31 00:29:59,698 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 00:29:59,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 00:29:59,700 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:29:59,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:29:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 00:29:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 00:29:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:29:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-03-31 00:29:59,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2023-03-31 00:29:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:29:59,704 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-03-31 00:29:59,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:29:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-03-31 00:29:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 00:29:59,705 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:29:59,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:29:59,713 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 00:29:59,905 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 00:29:59,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:29:59,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:29:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2023-03-31 00:29:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:29:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245577237] [2023-03-31 00:29:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:29:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:29:59,925 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:29:59,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368620781] [2023-03-31 00:29:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:29:59,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:29:59,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:29:59,928 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 00:29:59,929 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 00:29:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:29:59,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 00:29:59,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:00,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:00,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245577237] [2023-03-31 00:30:00,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:00,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368620781] [2023-03-31 00:30:00,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368620781] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:00,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:00,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:30:00,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553730858] [2023-03-31 00:30:00,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:00,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:30:00,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:30:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:30:00,135 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:00,188 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-03-31 00:30:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:30:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 00:30:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:00,189 INFO L225 Difference]: With dead ends: 35 [2023-03-31 00:30:00,189 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 00:30:00,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:30:00,192 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:00,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:00,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 00:30:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 00:30:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:30:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-03-31 00:30:00,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2023-03-31 00:30:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:00,199 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-03-31 00:30:00,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-03-31 00:30:00,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:30:00,200 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:00,200 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:00,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:30:00,400 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 00:30:00,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:00,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:00,401 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2023-03-31 00:30:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034778061] [2023-03-31 00:30:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:00,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:00,411 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:00,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934909169] [2023-03-31 00:30:00,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:00,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:00,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:00,413 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 00:30:00,417 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 00:30:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:00,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:30:00,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:00,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:00,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034778061] [2023-03-31 00:30:00,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:00,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934909169] [2023-03-31 00:30:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934909169] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 00:30:00,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:30:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-03-31 00:30:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466117860] [2023-03-31 00:30:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:00,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:30:00,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:30:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:30:00,678 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:02,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:30:05,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:30:07,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:30:09,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:30:11,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-03-31 00:30:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:11,126 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2023-03-31 00:30:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:30:11,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 00:30:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:11,127 INFO L225 Difference]: With dead ends: 48 [2023-03-31 00:30:11,127 INFO L226 Difference]: Without dead ends: 41 [2023-03-31 00:30:11,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:30:11,128 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:11,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 79 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 4 Unknown, 0 Unchecked, 10.4s Time] [2023-03-31 00:30:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-31 00:30:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-03-31 00:30:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:30:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-03-31 00:30:11,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2023-03-31 00:30:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:11,135 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-03-31 00:30:11,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-03-31 00:30:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:30:11,136 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:11,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:11,152 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 00:30:11,336 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 00:30:11,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:11,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:11,337 INFO L85 PathProgramCache]: Analyzing trace with hash -351133637, now seen corresponding path program 1 times [2023-03-31 00:30:11,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:11,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743248345] [2023-03-31 00:30:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:11,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:11,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:11,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175084396] [2023-03-31 00:30:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:11,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:11,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:11,349 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 00:30:11,351 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 00:30:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:11,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 00:30:11,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:30:11,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:11,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743248345] [2023-03-31 00:30:11,406 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:11,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175084396] [2023-03-31 00:30:11,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175084396] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:11,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:11,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:30:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828498387] [2023-03-31 00:30:11,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:11,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:30:11,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:30:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:30:11,409 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:11,437 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-03-31 00:30:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:30:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-03-31 00:30:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:11,441 INFO L225 Difference]: With dead ends: 51 [2023-03-31 00:30:11,441 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 00:30:11,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:30:11,444 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:11,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 00:30:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-03-31 00:30:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:30:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-03-31 00:30:11,457 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 17 [2023-03-31 00:30:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:11,457 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-03-31 00:30:11,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-03-31 00:30:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:30:11,459 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:11,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:11,465 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 00:30:11,665 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 00:30:11,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:11,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:11,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1617669815, now seen corresponding path program 1 times [2023-03-31 00:30:11,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:11,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595903193] [2023-03-31 00:30:11,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:11,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:11,681 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:11,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370199730] [2023-03-31 00:30:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:11,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:11,688 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 00:30:11,690 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 00:30:11,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:11,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:30:11,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:11,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:30:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:30:11,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:11,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595903193] [2023-03-31 00:30:11,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:11,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370199730] [2023-03-31 00:30:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370199730] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:30:11,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:30:11,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2023-03-31 00:30:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497739747] [2023-03-31 00:30:11,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:30:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:30:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:11,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:30:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:30:11,781 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:11,804 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2023-03-31 00:30:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:30:11,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 00:30:11,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:11,805 INFO L225 Difference]: With dead ends: 50 [2023-03-31 00:30:11,806 INFO L226 Difference]: Without dead ends: 29 [2023-03-31 00:30:11,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:30:11,808 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:11,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-31 00:30:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-03-31 00:30:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 00:30:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-03-31 00:30:11,819 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 18 [2023-03-31 00:30:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:11,825 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-03-31 00:30:11,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 00:30:11,826 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-03-31 00:30:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 00:30:11,826 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:30:11,826 INFO L195 NwaCegarLoop]: trace histogram [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 00:30:11,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 00:30:12,026 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 00:30:12,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:30:12,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:30:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 1 times [2023-03-31 00:30:12,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:30:12,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357631806] [2023-03-31 00:30:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:12,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:30:12,035 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:30:12,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696209724] [2023-03-31 00:30:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:30:12,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:30:12,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:30:12,036 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 00:30:12,038 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 00:30:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:30:12,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:30:12,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:30:12,096 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 00:30:12,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:30:12,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:30:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357631806] [2023-03-31 00:30:12,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:30:12,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696209724] [2023-03-31 00:30:12,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696209724] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:30:12,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:30:12,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:30:12,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706660557] [2023-03-31 00:30:12,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:30:12,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:30:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:30:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:30:12,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:30:12,099 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:30:12,112 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-03-31 00:30:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:30:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-03-31 00:30:12,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:30:12,112 INFO L225 Difference]: With dead ends: 29 [2023-03-31 00:30:12,112 INFO L226 Difference]: Without dead ends: 0 [2023-03-31 00:30:12,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:30:12,113 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:30:12,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:30:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-03-31 00:30:12,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-03-31 00:30:12,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-03-31 00:30:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-03-31 00:30:12,115 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2023-03-31 00:30:12,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:30:12,115 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-03-31 00:30:12,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:30:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-03-31 00:30:12,116 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-03-31 00:30:12,118 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 00:30:12,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-31 00:30:12,325 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 00:30:12,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point L12-1(line 12) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 12) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 15 17) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 26 50) no Hoare annotation was computed. [2023-03-31 00:30:12,539 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2023-03-31 00:30:12,540 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 26 50) no Hoare annotation was computed. [2023-03-31 00:30:12,540 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 26 50) the Hoare annotation is: (or (< 0 |old(~counter~0)|) (< |old(~counter~0)| 0) (and (<= 0 ~counter~0) (<= ~counter~0 0))) [2023-03-31 00:30:12,540 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 47) no Hoare annotation was computed. [2023-03-31 00:30:12,540 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 47) the Hoare annotation is: (or (forall ((main_~b~0 Int)) (= (mod main_~A~0 4294967296) (mod (+ main_~r~0 (* main_~b~0 main_~q~0)) 4294967296))) (< 0 |old(~counter~0)|) (< |old(~counter~0)| 0)) [2023-03-31 00:30:12,540 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 34 37) no Hoare annotation was computed. [2023-03-31 00:30:12,540 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 37) the Hoare annotation is: (or (and (= main_~b~0 1) (= main_~A~0 main_~r~0) (<= 0 ~counter~0) (= main_~q~0 0)) (and (forall ((main_~b~0 Int)) (= (mod main_~A~0 4294967296) (mod (+ main_~r~0 (* main_~b~0 main_~q~0)) 4294967296))) (<= 1 ~counter~0)) (< 0 |old(~counter~0)|) (< |old(~counter~0)| 0)) [2023-03-31 00:30:12,540 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 46) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L895 garLoopResultBuilder]: At program point L43-2(lines 38 47) the Hoare annotation is: (or (and (= main_~b~0 1) (= main_~A~0 main_~r~0) (<= 1 ~counter~0) (< (mod main_~r~0 4294967296) 1) (= main_~q~0 0)) (and (<= 2 ~counter~0) (forall ((main_~b~0 Int)) (= (mod main_~A~0 4294967296) (mod (+ main_~r~0 (* main_~b~0 main_~q~0)) 4294967296)))) (< 0 |old(~counter~0)|) (< |old(~counter~0)| 0)) [2023-03-31 00:30:12,541 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (or (< 0 |old(~counter~0)|) (< |old(~counter~0)| 0)) [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 47) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2023-03-31 00:30:12,541 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 24) the Hoare annotation is: true [2023-03-31 00:30:12,541 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2023-03-31 00:30:12,542 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2023-03-31 00:30:12,542 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2023-03-31 00:30:12,544 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:30:12,546 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 00:30:12,551 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] [2023-03-31 00:30:12,556 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] [2023-03-31 00:30:12,561 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] [2023-03-31 00:30:12,562 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] [2023-03-31 00:30:12,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 12:30:12 BoogieIcfgContainer [2023-03-31 00:30:12,564 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 00:30:12,564 INFO L158 Benchmark]: Toolchain (without parser) took 14139.11ms. Allocated memory was 177.2MB in the beginning and 249.6MB in the end (delta: 72.4MB). Free memory was 123.3MB in the beginning and 81.1MB in the end (delta: 42.2MB). Peak memory consumption was 115.1MB. Max. memory is 8.0GB. [2023-03-31 00:30:12,564 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 130.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 00:30:12,565 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.03ms. Allocated memory is still 177.2MB. Free memory was 123.3MB in the beginning and 112.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 00:30:12,565 INFO L158 Benchmark]: Boogie Preprocessor took 18.65ms. Allocated memory is still 177.2MB. Free memory was 112.8MB in the beginning and 111.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-31 00:30:12,565 INFO L158 Benchmark]: RCFGBuilder took 228.08ms. Allocated memory is still 177.2MB. Free memory was 111.2MB in the beginning and 99.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-03-31 00:30:12,565 INFO L158 Benchmark]: TraceAbstraction took 13712.73ms. Allocated memory was 177.2MB in the beginning and 249.6MB in the end (delta: 72.4MB). Free memory was 99.2MB in the beginning and 81.1MB in the end (delta: 18.0MB). Peak memory consumption was 90.9MB. Max. memory is 8.0GB. [2023-03-31 00:30:12,567 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 177.2MB. Free memory is still 130.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.03ms. Allocated memory is still 177.2MB. Free memory was 123.3MB in the beginning and 112.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.65ms. Allocated memory is still 177.2MB. Free memory was 112.8MB in the beginning and 111.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 228.08ms. Allocated memory is still 177.2MB. Free memory was 111.2MB in the beginning and 99.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 13712.73ms. Allocated memory was 177.2MB in the beginning and 249.6MB in the end (delta: 72.4MB). Free memory was 99.2MB in the beginning and 81.1MB in the end (delta: 18.0MB). Peak memory consumption was 90.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.6s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 42 SdHoareTripleChecker+Valid, 10.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 39 mSDsluCounter, 401 SdHoareTripleChecker+Invalid, 10.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 248 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 108 IncrementalHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 153 mSDtfsCounter, 108 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=4, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 23 PreInvPairs, 29 NumberOfFragments, 127 HoareAnnotationTreeSize, 23 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 143 ConstructedInterpolants, 8 QuantifiedInterpolants, 494 SizeOfPredicates, 10 NumberOfNonLiveVariables, 547 ConjunctsInSsa, 56 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant [2023-03-31 00:30:12,585 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] [2023-03-31 00:30:12,585 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] Derived loop invariant: (((((b == 1 && A == r) && 0 <= counter) && q == 0) || ((forall main_~b~0 : int :: A % 4294967296 == (r + main_~b~0 * q) % 4294967296) && 1 <= counter)) || 0 < \old(counter)) || \old(counter) < 0 - InvariantResult [Line: 38]: Loop Invariant [2023-03-31 00:30:12,586 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] [2023-03-31 00:30:12,586 WARN L421 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[main_~b~0,QUANTIFIED] Derived loop invariant: ((((((b == 1 && A == r) && 1 <= counter) && r % 4294967296 < 1) && q == 0) || (2 <= counter && (forall main_~b~0 : int :: A % 4294967296 == (r + main_~b~0 * q) % 4294967296))) || 0 < \old(counter)) || \old(counter) < 0 RESULT: Ultimate proved your program to be correct! [2023-03-31 00:30:12,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...