/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-66.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 09:44:08,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 09:44:08,426 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 09:44:08,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 09:44:08,432 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 09:44:08,455 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 09:44:08,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 09:44:08,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 09:44:08,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 09:44:08,459 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 09:44:08,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 09:44:08,459 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 09:44:08,459 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 09:44:08,460 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 09:44:08,460 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 09:44:08,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 09:44:08,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 09:44:08,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 09:44:08,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 09:44:08,461 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 09:44:08,461 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 09:44:08,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 09:44:08,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 09:44:08,462 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 09:44:08,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 09:44:08,462 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 09:44:08,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 09:44:08,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 09:44:08,463 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 09:44:08,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 09:44:08,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 09:44:08,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 09:44:08,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 09:44:08,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 09:44:08,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 09:44:08,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 09:44:08,465 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 09:44:08,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 09:44:08,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 09:44:08,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 09:44:08,707 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 09:44:08,708 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 09:44:08,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-66.i [2023-12-19 09:44:09,754 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 09:44:09,947 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 09:44:09,947 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-66.i [2023-12-19 09:44:09,953 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732dc5921/3d5a4012667a423a915e4cc9ac8ec4fa/FLAG61a6943d6 [2023-12-19 09:44:09,966 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732dc5921/3d5a4012667a423a915e4cc9ac8ec4fa [2023-12-19 09:44:09,968 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 09:44:09,969 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 09:44:09,971 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 09:44:09,971 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 09:44:09,975 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 09:44:09,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 09:44:09" (1/1) ... [2023-12-19 09:44:09,976 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663d3577 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:09, skipping insertion in model container [2023-12-19 09:44:09,976 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 09:44:09" (1/1) ... [2023-12-19 09:44:10,010 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 09:44:10,112 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-66.i[919,932] [2023-12-19 09:44:10,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 09:44:10,180 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 09:44:10,188 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-ci_file-66.i[919,932] [2023-12-19 09:44:10,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 09:44:10,224 INFO L206 MainTranslator]: Completed translation [2023-12-19 09:44:10,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10 WrapperNode [2023-12-19 09:44:10,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 09:44:10,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 09:44:10,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 09:44:10,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 09:44:10,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,239 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,276 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 180 [2023-12-19 09:44:10,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 09:44:10,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 09:44:10,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 09:44:10,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 09:44:10,288 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,290 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,303 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 09:44:10,303 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,303 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 09:44:10,322 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 09:44:10,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 09:44:10,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 09:44:10,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (1/1) ... [2023-12-19 09:44:10,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 09:44:10,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:10,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 09:44:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 09:44:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 09:44:10,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 09:44:10,392 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 09:44:10,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 09:44:10,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 09:44:10,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 09:44:10,475 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 09:44:10,477 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 09:44:10,740 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 09:44:10,773 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 09:44:10,773 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 09:44:10,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 09:44:10 BoogieIcfgContainer [2023-12-19 09:44:10,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 09:44:10,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 09:44:10,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 09:44:10,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 09:44:10,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 09:44:09" (1/3) ... [2023-12-19 09:44:10,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcd038c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 09:44:10, skipping insertion in model container [2023-12-19 09:44:10,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 09:44:10" (2/3) ... [2023-12-19 09:44:10,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcd038c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 09:44:10, skipping insertion in model container [2023-12-19 09:44:10,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 09:44:10" (3/3) ... [2023-12-19 09:44:10,779 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-ps-ci_file-66.i [2023-12-19 09:44:10,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 09:44:10,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 09:44:10,830 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 09:44:10,837 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=LoopHeads, 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;@1de7849, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 09:44:10,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 09:44:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 52 states have internal predecessors, (79), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 09:44:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-19 09:44:10,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:10,860 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:10,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:10,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1600670833, now seen corresponding path program 1 times [2023-12-19 09:44:10,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:10,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615528560] [2023-12-19 09:44:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:10,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:11,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 09:44:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615528560] [2023-12-19 09:44:11,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 09:44:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242925842] [2023-12-19 09:44:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:11,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:11,074 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) [2023-12-19 09:44:11,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 09:44:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:11,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 09:44:11,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 09:44:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-12-19 09:44:11,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 09:44:11,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242925842] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 09:44:11,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 09:44:11,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 09:44:11,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254124902] [2023-12-19 09:44:11,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 09:44:11,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 09:44:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 09:44:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 09:44:11,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 09:44:11,307 INFO L87 Difference]: Start difference. First operand has 76 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 52 states have internal predecessors, (79), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 09:44:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 09:44:11,353 INFO L93 Difference]: Finished difference Result 149 states and 266 transitions. [2023-12-19 09:44:11,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 09:44:11,356 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2023-12-19 09:44:11,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 09:44:11,361 INFO L225 Difference]: With dead ends: 149 [2023-12-19 09:44:11,361 INFO L226 Difference]: Without dead ends: 74 [2023-12-19 09:44:11,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 09:44:11,367 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 09:44:11,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 09:44:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-19 09:44:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-19 09:44:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.48) internal successors, (74), 50 states have internal predecessors, (74), 22 states have call successors, (22), 1 states have call predecessors, (22), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 09:44:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 118 transitions. [2023-12-19 09:44:11,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 118 transitions. Word has length 146 [2023-12-19 09:44:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 09:44:11,402 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 118 transitions. [2023-12-19 09:44:11,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (22), 1 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 09:44:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 118 transitions. [2023-12-19 09:44:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-19 09:44:11,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:11,410 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:11,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 09:44:11,615 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 [2023-12-19 09:44:11,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:11,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -336969333, now seen corresponding path program 1 times [2023-12-19 09:44:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821606652] [2023-12-19 09:44:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:11,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 09:44:11,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562432596] [2023-12-19 09:44:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:11,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:11,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:11,684 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) [2023-12-19 09:44:11,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 09:44:11,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:11,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 09:44:11,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 09:44:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-12-19 09:44:11,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 09:44:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 09:44:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821606652] [2023-12-19 09:44:11,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 09:44:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562432596] [2023-12-19 09:44:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562432596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 09:44:11,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 09:44:11,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 09:44:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849990753] [2023-12-19 09:44:11,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 09:44:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 09:44:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 09:44:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 09:44:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 09:44:11,976 INFO L87 Difference]: Start difference. First operand 74 states and 118 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 09:44:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 09:44:12,108 INFO L93 Difference]: Finished difference Result 199 states and 317 transitions. [2023-12-19 09:44:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 09:44:12,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2023-12-19 09:44:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 09:44:12,115 INFO L225 Difference]: With dead ends: 199 [2023-12-19 09:44:12,116 INFO L226 Difference]: Without dead ends: 126 [2023-12-19 09:44:12,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 09:44:12,120 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 181 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 09:44:12,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 201 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 09:44:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-19 09:44:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-12-19 09:44:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 88 states have (on average 1.5) internal successors, (132), 89 states have internal predecessors, (132), 32 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-19 09:44:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 196 transitions. [2023-12-19 09:44:12,146 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 196 transitions. Word has length 146 [2023-12-19 09:44:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 09:44:12,148 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 196 transitions. [2023-12-19 09:44:12,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 09:44:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 196 transitions. [2023-12-19 09:44:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-19 09:44:12,152 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:12,152 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:12,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 09:44:12,358 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 [2023-12-19 09:44:12,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:12,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1154617783, now seen corresponding path program 1 times [2023-12-19 09:44:12,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:12,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301277467] [2023-12-19 09:44:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:12,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 09:44:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33361206] [2023-12-19 09:44:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:12,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:12,424 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) [2023-12-19 09:44:12,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 09:44:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:12,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 09:44:12,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 09:44:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 481 proven. 33 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2023-12-19 09:44:12,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 09:44:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-12-19 09:44:12,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 09:44:12,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301277467] [2023-12-19 09:44:12,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 09:44:12,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33361206] [2023-12-19 09:44:12,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33361206] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 09:44:12,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 09:44:12,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-12-19 09:44:12,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859623508] [2023-12-19 09:44:12,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 09:44:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 09:44:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 09:44:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 09:44:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-19 09:44:12,799 INFO L87 Difference]: Start difference. First operand 123 states and 196 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-19 09:44:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 09:44:12,965 INFO L93 Difference]: Finished difference Result 204 states and 320 transitions. [2023-12-19 09:44:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 09:44:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 146 [2023-12-19 09:44:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 09:44:12,967 INFO L225 Difference]: With dead ends: 204 [2023-12-19 09:44:12,967 INFO L226 Difference]: Without dead ends: 80 [2023-12-19 09:44:12,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-12-19 09:44:12,969 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 131 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 09:44:12,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 188 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 09:44:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-19 09:44:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2023-12-19 09:44:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 53 states have internal predecessors, (74), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 09:44:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 118 transitions. [2023-12-19 09:44:12,977 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 118 transitions. Word has length 146 [2023-12-19 09:44:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 09:44:12,977 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 118 transitions. [2023-12-19 09:44:12,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (33), 2 states have call predecessors, (33), 4 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-12-19 09:44:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 118 transitions. [2023-12-19 09:44:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-19 09:44:12,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:12,979 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:12,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 09:44:13,192 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 [2023-12-19 09:44:13,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:13,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash -574518943, now seen corresponding path program 1 times [2023-12-19 09:44:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085286817] [2023-12-19 09:44:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:13,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:13,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 09:44:13,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721245885] [2023-12-19 09:44:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:13,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:13,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:13,265 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) [2023-12-19 09:44:13,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 09:44:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:13,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 09:44:13,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 09:44:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 453 proven. 39 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2023-12-19 09:44:13,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 09:44:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-12-19 09:44:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 09:44:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085286817] [2023-12-19 09:44:13,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 09:44:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721245885] [2023-12-19 09:44:13,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721245885] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 09:44:13,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 09:44:13,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-19 09:44:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077655784] [2023-12-19 09:44:13,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 09:44:13,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 09:44:13,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 09:44:13,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 09:44:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-19 09:44:13,806 INFO L87 Difference]: Start difference. First operand 78 states and 118 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-12-19 09:44:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 09:44:14,157 INFO L93 Difference]: Finished difference Result 324 states and 484 transitions. [2023-12-19 09:44:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 09:44:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) Word has length 147 [2023-12-19 09:44:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 09:44:14,160 INFO L225 Difference]: With dead ends: 324 [2023-12-19 09:44:14,160 INFO L226 Difference]: Without dead ends: 247 [2023-12-19 09:44:14,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-12-19 09:44:14,161 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 259 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 09:44:14,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 450 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 09:44:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-19 09:44:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2023-12-19 09:44:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 148 states have (on average 1.4054054054054055) internal successors, (208), 150 states have internal predecessors, (208), 60 states have call successors, (60), 6 states have call predecessors, (60), 6 states have return successors, (60), 58 states have call predecessors, (60), 60 states have call successors, (60) [2023-12-19 09:44:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 328 transitions. [2023-12-19 09:44:14,181 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 328 transitions. Word has length 147 [2023-12-19 09:44:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 09:44:14,181 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 328 transitions. [2023-12-19 09:44:14,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 4 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-12-19 09:44:14,182 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 328 transitions. [2023-12-19 09:44:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-19 09:44:14,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:14,183 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:14,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 09:44:14,396 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 [2023-12-19 09:44:14,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:14,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:14,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1352589862, now seen corresponding path program 1 times [2023-12-19 09:44:14,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:14,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562062469] [2023-12-19 09:44:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:14,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:14,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 09:44:14,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729768961] [2023-12-19 09:44:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:14,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:14,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:14,435 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) [2023-12-19 09:44:14,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 09:44:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:14,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 09:44:14,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 09:44:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 211 proven. 6 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2023-12-19 09:44:14,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 09:44:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-12-19 09:44:14,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 09:44:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562062469] [2023-12-19 09:44:14,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 09:44:14,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729768961] [2023-12-19 09:44:14,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729768961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 09:44:14,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 09:44:14,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-19 09:44:14,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709341447] [2023-12-19 09:44:14,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 09:44:14,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 09:44:14,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 09:44:14,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 09:44:14,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-19 09:44:14,800 INFO L87 Difference]: Start difference. First operand 215 states and 328 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-12-19 09:44:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 09:44:15,385 INFO L93 Difference]: Finished difference Result 834 states and 1244 transitions. [2023-12-19 09:44:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 09:44:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) Word has length 148 [2023-12-19 09:44:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 09:44:15,392 INFO L225 Difference]: With dead ends: 834 [2023-12-19 09:44:15,392 INFO L226 Difference]: Without dead ends: 620 [2023-12-19 09:44:15,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2023-12-19 09:44:15,393 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 631 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 09:44:15,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 489 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 09:44:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2023-12-19 09:44:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 562. [2023-12-19 09:44:15,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 374 states have (on average 1.36096256684492) internal successors, (509), 380 states have internal predecessors, (509), 166 states have call successors, (166), 21 states have call predecessors, (166), 21 states have return successors, (166), 160 states have call predecessors, (166), 166 states have call successors, (166) [2023-12-19 09:44:15,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 841 transitions. [2023-12-19 09:44:15,462 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 841 transitions. Word has length 148 [2023-12-19 09:44:15,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 09:44:15,462 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 841 transitions. [2023-12-19 09:44:15,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (44), 3 states have call predecessors, (44), 5 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-12-19 09:44:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 841 transitions. [2023-12-19 09:44:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-19 09:44:15,464 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:15,465 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:15,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 09:44:15,671 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 [2023-12-19 09:44:15,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:15,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1562132618, now seen corresponding path program 1 times [2023-12-19 09:44:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:15,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132364439] [2023-12-19 09:44:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:15,706 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 09:44:15,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601171721] [2023-12-19 09:44:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:15,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:15,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:15,710 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) [2023-12-19 09:44:15,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 09:44:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:15,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 09:44:15,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 09:44:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 463 proven. 24 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2023-12-19 09:44:15,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 09:44:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 39 proven. 24 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2023-12-19 09:44:15,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 09:44:15,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132364439] [2023-12-19 09:44:15,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 09:44:15,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601171721] [2023-12-19 09:44:15,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601171721] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 09:44:15,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 09:44:15,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-12-19 09:44:15,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418825105] [2023-12-19 09:44:15,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 09:44:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 09:44:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 09:44:15,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 09:44:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-19 09:44:15,993 INFO L87 Difference]: Start difference. First operand 562 states and 841 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-19 09:44:16,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 09:44:16,134 INFO L93 Difference]: Finished difference Result 1165 states and 1716 transitions. [2023-12-19 09:44:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 09:44:16,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 149 [2023-12-19 09:44:16,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 09:44:16,140 INFO L225 Difference]: With dead ends: 1165 [2023-12-19 09:44:16,141 INFO L226 Difference]: Without dead ends: 604 [2023-12-19 09:44:16,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-12-19 09:44:16,144 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 76 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 09:44:16,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 212 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 09:44:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2023-12-19 09:44:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 590. [2023-12-19 09:44:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 395 states have (on average 1.3316455696202532) internal successors, (526), 401 states have internal predecessors, (526), 166 states have call successors, (166), 28 states have call predecessors, (166), 28 states have return successors, (166), 160 states have call predecessors, (166), 166 states have call successors, (166) [2023-12-19 09:44:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 858 transitions. [2023-12-19 09:44:16,199 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 858 transitions. Word has length 149 [2023-12-19 09:44:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 09:44:16,200 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 858 transitions. [2023-12-19 09:44:16,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 2 states have call successors, (30), 2 states have call predecessors, (30), 4 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-19 09:44:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 858 transitions. [2023-12-19 09:44:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-19 09:44:16,201 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 09:44:16,201 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 09:44:16,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 09:44:16,409 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 [2023-12-19 09:44:16,409 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 09:44:16,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 09:44:16,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1696146124, now seen corresponding path program 1 times [2023-12-19 09:44:16,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 09:44:16,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522552789] [2023-12-19 09:44:16,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:16,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 09:44:16,440 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 09:44:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531507] [2023-12-19 09:44:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 09:44:16,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 09:44:16,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 09:44:16,442 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) [2023-12-19 09:44:16,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 09:44:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 09:44:16,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-19 09:44:16,534 INFO L285 TraceCheckSpWp]: Computing forward predicates...