/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/array-fpi/ifeqn4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:51:50,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:51:50,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:51:50,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:51:50,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:51:50,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:51:50,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:51:50,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:51:50,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:51:50,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:51:50,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:51:50,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:51:50,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:51:50,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:51:50,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:51:50,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:51:50,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:51:50,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:51:50,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:51:50,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:51:50,937 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 [2023-04-01 19:51:50,950 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:51:50,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:51:50,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:51:50,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:51:50,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:51:50,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:51:50,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:51:50,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:51:50,952 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:51:50,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:51:50,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:51:50,954 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:51:50,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:51:50,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:51:50,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:51:50,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:51:50,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:51:50,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:51:50,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:51:50,955 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:51:50,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:51:51,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:51:51,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:51:51,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:51:51,146 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:51:51,146 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:51:51,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4.c [2023-04-01 19:51:52,122 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:51:52,290 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:51:52,291 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4.c [2023-04-01 19:51:52,296 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05663fea/fc66c4e84d084f1cb1bf713178f7fde9/FLAGbb8348e39 [2023-04-01 19:51:52,316 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05663fea/fc66c4e84d084f1cb1bf713178f7fde9 [2023-04-01 19:51:52,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:51:52,320 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:51:52,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:51:52,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:51:52,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:51:52,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a946988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52, skipping insertion in model container [2023-04-01 19:51:52,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:51:52,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:51:52,445 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/array-fpi/ifeqn4.c[589,602] [2023-04-01 19:51:52,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:51:52,480 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:51:52,490 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/array-fpi/ifeqn4.c[589,602] [2023-04-01 19:51:52,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:51:52,517 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:51:52,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52 WrapperNode [2023-04-01 19:51:52,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:51:52,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:51:52,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:51:52,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:51:52,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,562 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:51:52,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:51:52,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:51:52,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:51:52,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (1/1) ... [2023-04-01 19:51:52,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:51:52,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:52,590 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) [2023-04-01 19:51:52,608 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 [2023-04-01 19:51:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:51:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:51:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:51:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:51:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:51:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:51:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 19:51:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:51:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:51:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:51:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:51:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:51:52,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:51:52,673 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:51:52,674 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:51:52,839 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:51:52,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:51:52,843 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:51:52,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:51:52 BoogieIcfgContainer [2023-04-01 19:51:52,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:51:52,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:51:52,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:51:52,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:51:52,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:51:52" (1/3) ... [2023-04-01 19:51:52,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147b9fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:51:52, skipping insertion in model container [2023-04-01 19:51:52,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:51:52" (2/3) ... [2023-04-01 19:51:52,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147b9fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:51:52, skipping insertion in model container [2023-04-01 19:51:52,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:51:52" (3/3) ... [2023-04-01 19:51:52,850 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2023-04-01 19:51:52,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:51:52,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:51:52,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:51:52,898 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;@3b8a5031, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:51:52,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:51:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:51:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 19:51:52,906 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:52,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:52,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:52,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1482202103, now seen corresponding path program 1 times [2023-04-01 19:51:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:52,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825791591] [2023-04-01 19:51:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:53,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825791591] [2023-04-01 19:51:53,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 19:51:53,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523048053] [2023-04-01 19:51:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:53,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:53,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:53,075 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) [2023-04-01 19:51:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:51:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:53,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-01 19:51:53,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:53,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:51:53,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523048053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:51:53,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:51:53,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 19:51:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733721489] [2023-04-01 19:51:53,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:51:53,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 19:51:53,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:53,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 19:51:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 19:51:53,211 INFO L87 Difference]: Start difference. First operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 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 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:51:53,232 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-04-01 19:51:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 19:51:53,234 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 19:51:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:51:53,238 INFO L225 Difference]: With dead ends: 62 [2023-04-01 19:51:53,238 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 19:51:53,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 19:51:53,245 INFO L413 NwaCegarLoop]: 41 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, 41 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 [2023-04-01 19:51:53,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:51:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 19:51:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 19:51:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:51:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 19:51:53,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2023-04-01 19:51:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:51:53,277 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 19:51:53,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 19:51:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 19:51:53,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:53,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:53,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:51:53,483 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 [2023-04-01 19:51:53,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:53,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:53,485 INFO L85 PathProgramCache]: Analyzing trace with hash -539484107, now seen corresponding path program 1 times [2023-04-01 19:51:53,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:53,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656181370] [2023-04-01 19:51:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:53,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:53,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:51:53,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219862222] [2023-04-01 19:51:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:53,511 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) [2023-04-01 19:51:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:51:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:53,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:51:53,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:53,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:51:53,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:53,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656181370] [2023-04-01 19:51:53,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:51:53,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219862222] [2023-04-01 19:51:53,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219862222] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:51:53,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:51:53,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:51:53,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804261406] [2023-04-01 19:51:53,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:51:53,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:51:53,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:53,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:51:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:51:53,609 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-04-01 19:51:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:51:53,654 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2023-04-01 19:51:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:51:53,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 19:51:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:51:53,657 INFO L225 Difference]: With dead ends: 56 [2023-04-01 19:51:53,657 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 19:51:53,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:51:53,658 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:51:53,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:51:53,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 19:51:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2023-04-01 19:51:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:51:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-04-01 19:51:53,665 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-04-01 19:51:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:51:53,665 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-04-01 19:51:53,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-04-01 19:51:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-04-01 19:51:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 19:51:53,666 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:53,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:53,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 19:51:53,875 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 [2023-04-01 19:51:53,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:53,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:53,876 INFO L85 PathProgramCache]: Analyzing trace with hash 393970846, now seen corresponding path program 1 times [2023-04-01 19:51:53,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:53,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838535545] [2023-04-01 19:51:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:53,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:53,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838535545] [2023-04-01 19:51:53,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-01 19:51:53,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858601956] [2023-04-01 19:51:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:53,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:53,922 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) [2023-04-01 19:51:53,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:51:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:53,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:51:53,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:51:54,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:51:54,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858601956] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:51:54,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:51:54,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:51:54,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282087954] [2023-04-01 19:51:54,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:51:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:51:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:54,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:51:54,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:51:54,008 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:51:54,052 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-04-01 19:51:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:51:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 19:51:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:51:54,054 INFO L225 Difference]: With dead ends: 60 [2023-04-01 19:51:54,054 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 19:51:54,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:51:54,056 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:51:54,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:51:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 19:51:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2023-04-01 19:51:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:51:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 19:51:54,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2023-04-01 19:51:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:51:54,063 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 19:51:54,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 19:51:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 19:51:54,064 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:54,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:54,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 19:51:54,268 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 [2023-04-01 19:51:54,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:54,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash -286087524, now seen corresponding path program 1 times [2023-04-01 19:51:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:54,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632823789] [2023-04-01 19:51:54,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:54,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:54,288 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:51:54,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648074960] [2023-04-01 19:51:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:54,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:54,291 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) [2023-04-01 19:51:54,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:51:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:54,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-01 19:51:54,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:54,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:51:54,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:51:54,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:51:54,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632823789] [2023-04-01 19:51:54,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:51:54,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648074960] [2023-04-01 19:51:54,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648074960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:51:54,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:51:54,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-01 19:51:54,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765058570] [2023-04-01 19:51:54,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:51:54,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 19:51:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:54,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 19:51:54,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-04-01 19:51:54,480 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:51:54,609 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2023-04-01 19:51:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 19:51:54,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 19:51:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:51:54,613 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:51:54,613 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 19:51:54,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:51:54,622 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:51:54,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 178 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:51:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 19:51:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2023-04-01 19:51:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:51:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2023-04-01 19:51:54,628 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 28 [2023-04-01 19:51:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:51:54,628 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2023-04-01 19:51:54,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2023-04-01 19:51:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 19:51:54,629 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:54,629 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, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:54,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:51:54,835 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 [2023-04-01 19:51:54,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:54,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:54,836 INFO L85 PathProgramCache]: Analyzing trace with hash -408220957, now seen corresponding path program 1 times [2023-04-01 19:51:54,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:54,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405033401] [2023-04-01 19:51:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:54,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:51:54,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480016094] [2023-04-01 19:51:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:54,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:54,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:54,855 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) [2023-04-01 19:51:54,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:51:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:54,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:51:54,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:54,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:51:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405033401] [2023-04-01 19:51:54,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:51:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480016094] [2023-04-01 19:51:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480016094] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:51:54,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:51:54,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-04-01 19:51:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65756804] [2023-04-01 19:51:54,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:51:54,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 19:51:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 19:51:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 19:51:54,992 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:51:55,118 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2023-04-01 19:51:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 19:51:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-04-01 19:51:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:51:55,121 INFO L225 Difference]: With dead ends: 90 [2023-04-01 19:51:55,121 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 19:51:55,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:51:55,123 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:51:55,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:51:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 19:51:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-04-01 19:51:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:51:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-04-01 19:51:55,141 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2023-04-01 19:51:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:51:55,141 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-04-01 19:51:55,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-04-01 19:51:55,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:51:55,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:55,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:55,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 19:51:55,348 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 [2023-04-01 19:51:55,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:55,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash 468092377, now seen corresponding path program 1 times [2023-04-01 19:51:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:55,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169016446] [2023-04-01 19:51:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:55,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:55,367 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:51:55,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464696166] [2023-04-01 19:51:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:55,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:55,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:55,369 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) [2023-04-01 19:51:55,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:51:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:55,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 19:51:55,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:55,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:51:55,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:51:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:55,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:51:55,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-04-01 19:51:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 19:51:55,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:55,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169016446] [2023-04-01 19:51:55,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:51:55,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464696166] [2023-04-01 19:51:55,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464696166] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:51:55,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:51:55,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-04-01 19:51:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567307268] [2023-04-01 19:51:55,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:51:55,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 19:51:55,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 19:51:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-04-01 19:51:55,814 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 17 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:51:56,143 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2023-04-01 19:51:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 19:51:56,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-04-01 19:51:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:51:56,144 INFO L225 Difference]: With dead ends: 118 [2023-04-01 19:51:56,144 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 19:51:56,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-04-01 19:51:56,145 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:51:56,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 244 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:51:56,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 19:51:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2023-04-01 19:51:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:51:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-04-01 19:51:56,152 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 34 [2023-04-01 19:51:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:51:56,153 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-04-01 19:51:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:51:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-04-01 19:51:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 19:51:56,153 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:51:56,153 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:51:56,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 19:51:56,358 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 [2023-04-01 19:51:56,358 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:51:56,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:51:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1462132655, now seen corresponding path program 1 times [2023-04-01 19:51:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:51:56,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188904668] [2023-04-01 19:51:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:51:56,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:51:56,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488881366] [2023-04-01 19:51:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:51:56,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:51:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:51:56,395 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) [2023-04-01 19:51:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:51:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:51:56,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 19:51:56,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:51:56,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 19:51:56,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:51:56,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:51:56,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:51:56,703 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 19:51:56,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:51:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:56,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:51:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:51:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:51:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188904668] [2023-04-01 19:51:57,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:51:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488881366] [2023-04-01 19:51:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488881366] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:51:57,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:51:57,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2023-04-01 19:51:57,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990654569] [2023-04-01 19:51:57,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:51:57,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 19:51:57,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:51:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 19:51:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-04-01 19:51:57,550 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 19:52:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:01,312 INFO L93 Difference]: Finished difference Result 183 states and 217 transitions. [2023-04-01 19:52:01,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 19:52:01,313 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2023-04-01 19:52:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:01,315 INFO L225 Difference]: With dead ends: 183 [2023-04-01 19:52:01,315 INFO L226 Difference]: Without dead ends: 181 [2023-04-01 19:52:01,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=421, Invalid=1931, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 19:52:01,316 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 234 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:01,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 370 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 19:52:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-04-01 19:52:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 116. [2023-04-01 19:52:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 101 states have internal predecessors, (121), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 19:52:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2023-04-01 19:52:01,341 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 42 [2023-04-01 19:52:01,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:01,341 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2023-04-01 19:52:01,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 19:52:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2023-04-01 19:52:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 19:52:01,345 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:01,346 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:01,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:01,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:01,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:01,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:01,553 INFO L85 PathProgramCache]: Analyzing trace with hash -826853978, now seen corresponding path program 2 times [2023-04-01 19:52:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:01,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770718945] [2023-04-01 19:52:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:01,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:01,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:01,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064662324] [2023-04-01 19:52:01,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:52:01,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:01,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:01,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:01,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:52:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:52:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:01,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:52:01,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:52:01,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:52:01,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:01,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770718945] [2023-04-01 19:52:01,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:01,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064662324] [2023-04-01 19:52:01,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064662324] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:01,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:01,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 19:52:01,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040925477] [2023-04-01 19:52:01,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:01,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:52:01,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:01,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:52:01,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:52:01,754 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:01,913 INFO L93 Difference]: Finished difference Result 273 states and 318 transitions. [2023-04-01 19:52:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:52:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-04-01 19:52:01,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:01,914 INFO L225 Difference]: With dead ends: 273 [2023-04-01 19:52:01,914 INFO L226 Difference]: Without dead ends: 164 [2023-04-01 19:52:01,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-04-01 19:52:01,917 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:01,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 128 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:52:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-04-01 19:52:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 139. [2023-04-01 19:52:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 121 states have internal predecessors, (140), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 19:52:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 160 transitions. [2023-04-01 19:52:01,951 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 160 transitions. Word has length 43 [2023-04-01 19:52:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:01,952 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 160 transitions. [2023-04-01 19:52:01,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 160 transitions. [2023-04-01 19:52:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 19:52:01,956 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:01,956 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:01,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:02,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-01 19:52:02,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:02,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash 628354972, now seen corresponding path program 3 times [2023-04-01 19:52:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:02,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613895063] [2023-04-01 19:52:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:02,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:02,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:02,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446210337] [2023-04-01 19:52:02,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:52:02,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:02,197 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:02,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:52:02,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 19:52:02,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:02,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 19:52:02,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:52:02,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:52:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613895063] [2023-04-01 19:52:02,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:02,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446210337] [2023-04-01 19:52:02,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446210337] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:02,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:02,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-04-01 19:52:02,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454219255] [2023-04-01 19:52:02,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:02,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 19:52:02,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:02,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 19:52:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2023-04-01 19:52:02,686 INFO L87 Difference]: Start difference. First operand 139 states and 160 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:03,274 INFO L93 Difference]: Finished difference Result 425 states and 499 transitions. [2023-04-01 19:52:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-04-01 19:52:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-04-01 19:52:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:03,275 INFO L225 Difference]: With dead ends: 425 [2023-04-01 19:52:03,275 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 19:52:03,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 19:52:03,277 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 167 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:03,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 265 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:52:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 19:52:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 179. [2023-04-01 19:52:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 159 states have (on average 1.1635220125786163) internal successors, (185), 161 states have internal predecessors, (185), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 19:52:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2023-04-01 19:52:03,297 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 46 [2023-04-01 19:52:03,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:03,298 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2023-04-01 19:52:03,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2023-04-01 19:52:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 19:52:03,298 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:03,298 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:03,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:03,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:03,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:03,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -641701402, now seen corresponding path program 4 times [2023-04-01 19:52:03,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:03,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975341271] [2023-04-01 19:52:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:03,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:03,523 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:03,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277282438] [2023-04-01 19:52:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:52:03,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:03,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:03,525 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:03,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:52:03,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:52:03,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:03,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:52:03,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:52:03,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:52:03,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975341271] [2023-04-01 19:52:03,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277282438] [2023-04-01 19:52:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277282438] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:03,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:03,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2023-04-01 19:52:03,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379762430] [2023-04-01 19:52:03,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:03,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 19:52:03,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:03,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 19:52:03,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:52:03,755 INFO L87 Difference]: Start difference. First operand 179 states and 205 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:04,173 INFO L93 Difference]: Finished difference Result 366 states and 421 transitions. [2023-04-01 19:52:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 19:52:04,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-04-01 19:52:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:04,174 INFO L225 Difference]: With dead ends: 366 [2023-04-01 19:52:04,174 INFO L226 Difference]: Without dead ends: 242 [2023-04-01 19:52:04,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=775, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:52:04,176 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 180 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:04,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 179 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:52:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-04-01 19:52:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 203. [2023-04-01 19:52:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 177 states have (on average 1.11864406779661) internal successors, (198), 180 states have internal predecessors, (198), 16 states have call successors, (16), 11 states have call predecessors, (16), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 19:52:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 226 transitions. [2023-04-01 19:52:04,214 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 226 transitions. Word has length 49 [2023-04-01 19:52:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:04,214 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 226 transitions. [2023-04-01 19:52:04,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 226 transitions. [2023-04-01 19:52:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 19:52:04,215 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:04,215 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:04,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 19:52:04,419 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:04,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 991736633, now seen corresponding path program 2 times [2023-04-01 19:52:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:04,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761587732] [2023-04-01 19:52:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:04,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:04,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:04,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48559847] [2023-04-01 19:52:04,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:52:04,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:04,453 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:04,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:52:04,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:52:04,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:04,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:52:04,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 19:52:04,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 19:52:04,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761587732] [2023-04-01 19:52:04,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:04,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48559847] [2023-04-01 19:52:04,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48559847] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:04,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:04,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-04-01 19:52:04,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221742804] [2023-04-01 19:52:04,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:04,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:52:04,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:04,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:52:04,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:52:04,638 INFO L87 Difference]: Start difference. First operand 203 states and 226 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:52:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:04,790 INFO L93 Difference]: Finished difference Result 351 states and 396 transitions. [2023-04-01 19:52:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 19:52:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2023-04-01 19:52:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:04,792 INFO L225 Difference]: With dead ends: 351 [2023-04-01 19:52:04,792 INFO L226 Difference]: Without dead ends: 163 [2023-04-01 19:52:04,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-01 19:52:04,793 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:04,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 89 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:52:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-04-01 19:52:04,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 140. [2023-04-01 19:52:04,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 120 states have internal predecessors, (127), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 19:52:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2023-04-01 19:52:04,815 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 51 [2023-04-01 19:52:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:04,815 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2023-04-01 19:52:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:52:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2023-04-01 19:52:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-04-01 19:52:04,816 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:04,816 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:04,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:05,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 19:52:05,021 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:05,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1770738524, now seen corresponding path program 5 times [2023-04-01 19:52:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493663202] [2023-04-01 19:52:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:05,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:05,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:05,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828941554] [2023-04-01 19:52:05,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:52:05,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:05,038 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:05,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:52:12,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 19:52:12,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:12,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 19:52:12,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:12,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:52:12,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:52:12,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:52:12,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:52:12,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:52:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:52:12,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-01 19:52:13,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493663202] [2023-04-01 19:52:13,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828941554] [2023-04-01 19:52:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828941554] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:13,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-04-01 19:52:13,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711232319] [2023-04-01 19:52:13,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:13,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 19:52:13,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 19:52:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-04-01 19:52:13,269 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:14,550 INFO L93 Difference]: Finished difference Result 245 states and 278 transitions. [2023-04-01 19:52:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 19:52:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2023-04-01 19:52:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:14,552 INFO L225 Difference]: With dead ends: 245 [2023-04-01 19:52:14,552 INFO L226 Difference]: Without dead ends: 243 [2023-04-01 19:52:14,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:52:14,552 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 183 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:14,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 336 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 19:52:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-04-01 19:52:14,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2023-04-01 19:52:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.1111111111111112) internal successors, (160), 149 states have internal predecessors, (160), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 19:52:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2023-04-01 19:52:14,580 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 52 [2023-04-01 19:52:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:14,581 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2023-04-01 19:52:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:52:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2023-04-01 19:52:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:52:14,581 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:14,581 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:14,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 19:52:14,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:14,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:14,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1894454382, now seen corresponding path program 3 times [2023-04-01 19:52:14,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:14,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045720002] [2023-04-01 19:52:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:14,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:14,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545532722] [2023-04-01 19:52:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:52:14,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:14,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:14,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:14,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:52:14,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 19:52:14,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:14,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 19:52:14,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 19:52:15,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:52:15,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045720002] [2023-04-01 19:52:15,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:15,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545532722] [2023-04-01 19:52:15,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545532722] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:15,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:15,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-04-01 19:52:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138065509] [2023-04-01 19:52:15,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:15,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 19:52:15,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:15,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 19:52:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-04-01 19:52:15,249 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:52:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:52:15,903 INFO L93 Difference]: Finished difference Result 242 states and 263 transitions. [2023-04-01 19:52:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 19:52:15,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-04-01 19:52:15,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:52:15,904 INFO L225 Difference]: With dead ends: 242 [2023-04-01 19:52:15,904 INFO L226 Difference]: Without dead ends: 204 [2023-04-01 19:52:15,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=1475, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 19:52:15,905 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:52:15,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 230 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:52:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-04-01 19:52:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 178. [2023-04-01 19:52:15,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 153 states have internal predecessors, (164), 16 states have call successors, (16), 13 states have call predecessors, (16), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 19:52:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 192 transitions. [2023-04-01 19:52:15,934 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 192 transitions. Word has length 54 [2023-04-01 19:52:15,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:52:15,934 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 192 transitions. [2023-04-01 19:52:15,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:52:15,934 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 192 transitions. [2023-04-01 19:52:15,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 19:52:15,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:52:15,935 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:52:15,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 19:52:16,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:52:16,140 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:52:16,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:52:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1905674408, now seen corresponding path program 4 times [2023-04-01 19:52:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:52:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549655898] [2023-04-01 19:52:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:52:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:52:16,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:52:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512764168] [2023-04-01 19:52:16,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:52:16,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:52:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:52:16,164 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:52:16,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 19:52:16,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:52:16,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:52:16,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 63 conjunts are in the unsatisfiable core [2023-04-01 19:52:16,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:52:16,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 19:52:16,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:52:16,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:52:16,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:52:16,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:52:16,576 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-01 19:52:16,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 19:52:16,648 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-04-01 19:52:16,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 19:52:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:52:17,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:52:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:52:26,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:52:26,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549655898] [2023-04-01 19:52:26,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:52:26,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512764168] [2023-04-01 19:52:26,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512764168] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:52:26,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:52:26,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2023-04-01 19:52:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228075286] [2023-04-01 19:52:26,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:52:26,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:52:26,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:52:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:52:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:52:26,537 INFO L87 Difference]: Start difference. First operand 178 states and 192 transitions. Second operand has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 19:53:05,636 WARN L223 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 203 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:53:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:53:29,141 INFO L93 Difference]: Finished difference Result 372 states and 419 transitions. [2023-04-01 19:53:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 19:53:29,141 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2023-04-01 19:53:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:53:29,142 INFO L225 Difference]: With dead ends: 372 [2023-04-01 19:53:29,143 INFO L226 Difference]: Without dead ends: 334 [2023-04-01 19:53:29,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 58.4s TimeCoverageRelationStatistics Valid=839, Invalid=4417, Unknown=0, NotChecked=0, Total=5256 [2023-04-01 19:53:29,144 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 364 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:53:29,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 639 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2023-04-01 19:53:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-04-01 19:53:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 241. [2023-04-01 19:53:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 202 states have (on average 1.099009900990099) internal successors, (222), 207 states have internal predecessors, (222), 23 states have call successors, (23), 17 states have call predecessors, (23), 15 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-01 19:53:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 265 transitions. [2023-04-01 19:53:29,196 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 265 transitions. Word has length 56 [2023-04-01 19:53:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:53:29,197 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 265 transitions. [2023-04-01 19:53:29,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 39 states have internal predecessors, (81), 7 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 19:53:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 265 transitions. [2023-04-01 19:53:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-01 19:53:29,197 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:53:29,198 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:53:29,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-04-01 19:53:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:53:29,403 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:53:29,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:53:29,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1049432871, now seen corresponding path program 5 times [2023-04-01 19:53:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:53:29,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543047590] [2023-04-01 19:53:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:53:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:53:29,418 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:53:29,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086506416] [2023-04-01 19:53:29,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:53:29,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:53:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:53:29,419 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:53:29,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-01 19:53:40,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-01 19:53:40,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:53:40,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 19:53:40,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:53:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 60 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:53:40,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:53:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:53:40,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:53:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543047590] [2023-04-01 19:53:40,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:53:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086506416] [2023-04-01 19:53:40,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086506416] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:53:40,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:53:40,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2023-04-01 19:53:40,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292281352] [2023-04-01 19:53:40,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:53:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 19:53:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:53:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 19:53:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2023-04-01 19:53:40,327 INFO L87 Difference]: Start difference. First operand 241 states and 265 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:53:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:53:41,032 INFO L93 Difference]: Finished difference Result 314 states and 345 transitions. [2023-04-01 19:53:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 19:53:41,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2023-04-01 19:53:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:53:41,035 INFO L225 Difference]: With dead ends: 314 [2023-04-01 19:53:41,035 INFO L226 Difference]: Without dead ends: 249 [2023-04-01 19:53:41,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 19:53:41,036 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 151 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:53:41,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 308 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 19:53:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2023-04-01 19:53:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 199. [2023-04-01 19:53:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 171 states have (on average 1.087719298245614) internal successors, (186), 174 states have internal predecessors, (186), 16 states have call successors, (16), 13 states have call predecessors, (16), 11 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 19:53:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 216 transitions. [2023-04-01 19:53:41,078 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 216 transitions. Word has length 63 [2023-04-01 19:53:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:53:41,078 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 216 transitions. [2023-04-01 19:53:41,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:53:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 216 transitions. [2023-04-01 19:53:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-01 19:53:41,079 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:53:41,079 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:53:41,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-04-01 19:53:41,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 19:53:41,284 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:53:41,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:53:41,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1024225070, now seen corresponding path program 6 times [2023-04-01 19:53:41,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:53:41,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010521886] [2023-04-01 19:53:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:53:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:53:41,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:53:41,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140425249] [2023-04-01 19:53:41,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:53:41,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:53:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:53:41,299 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:53:41,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-01 19:53:44,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-04-01 19:53:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:53:44,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 19:53:44,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:53:44,575 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 70 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:53:44,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:53:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:53:44,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:53:44,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010521886] [2023-04-01 19:53:44,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 19:53:44,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140425249] [2023-04-01 19:53:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140425249] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:53:44,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:53:44,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-04-01 19:53:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011820316] [2023-04-01 19:53:44,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:53:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 19:53:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:53:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 19:53:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:53:44,711 INFO L87 Difference]: Start difference. First operand 199 states and 216 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:53:45,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:53:45,390 INFO L93 Difference]: Finished difference Result 353 states and 387 transitions. [2023-04-01 19:53:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 19:53:45,390 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2023-04-01 19:53:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:53:45,397 INFO L225 Difference]: With dead ends: 353 [2023-04-01 19:53:45,397 INFO L226 Difference]: Without dead ends: 269 [2023-04-01 19:53:45,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=488, Invalid=1492, Unknown=0, NotChecked=0, Total=1980 [2023-04-01 19:53:45,398 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 392 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:53:45,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 182 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:53:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-04-01 19:53:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 234. [2023-04-01 19:53:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 200 states have (on average 1.065) internal successors, (213), 203 states have internal predecessors, (213), 20 states have call successors, (20), 15 states have call predecessors, (20), 13 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 19:53:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 249 transitions. [2023-04-01 19:53:45,455 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 249 transitions. Word has length 66 [2023-04-01 19:53:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:53:45,456 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 249 transitions. [2023-04-01 19:53:45,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:53:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 249 transitions. [2023-04-01 19:53:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 19:53:45,456 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:53:45,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:53:45,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-01 19:53:45,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-01 19:53:45,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:53:45,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:53:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash 426994171, now seen corresponding path program 7 times [2023-04-01 19:53:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:53:45,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035969808] [2023-04-01 19:53:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:53:45,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:53:45,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 19:53:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075064634] [2023-04-01 19:53:45,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:53:45,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:53:45,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:53:45,679 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:53:45,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-01 19:53:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:53:46,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 73 conjunts are in the unsatisfiable core [2023-04-01 19:53:46,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:53:46,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-04-01 19:53:46,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:53:46,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:53:46,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-04-01 19:53:46,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 19:53:46,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2023-04-01 19:53:46,368 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-01 19:53:46,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 48 [2023-04-01 19:53:46,452 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-04-01 19:53:46,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 47 treesize of output 58 [2023-04-01 19:53:46,540 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 19:53:46,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-04-01 19:53:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:53:47,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:54:58,399 WARN L223 SmtUtils]: Spent 12.93s on a formula simplification. DAG size of input: 148 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:55:15,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118488921270 treesize of output 115338491062