/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/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:37:21,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:37:21,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:37:21,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:37:21,183 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 [2023-04-02 01:37:21,209 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:37:21,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:37:21,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:37:21,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:37:21,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:37:21,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:37:21,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:37:21,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:37:21,212 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:37:21,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:37:21,213 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:37:21,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:37:21,214 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:37:21,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:37:21,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:37:21,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:37:21,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:37:21,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:37:21,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:37:21,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:37:21,216 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:37:21,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:37:21,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:37:21,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:37:21,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:37:21,465 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:37:21,465 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:37:21,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c [2023-04-02 01:37:22,584 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:37:22,751 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:37:22,752 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c [2023-04-02 01:37:22,757 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/021fddc50/2b45bd9bcc8c49cbb82043f8504e95fa/FLAG3aa2032eb [2023-04-02 01:37:22,768 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/021fddc50/2b45bd9bcc8c49cbb82043f8504e95fa [2023-04-02 01:37:22,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:37:22,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:37:22,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:37:22,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:37:22,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:37:22,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605d1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22, skipping insertion in model container [2023-04-02 01:37:22,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:37:22,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:37:22,943 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/loops-crafted-1/mono-crafted_3.c[318,331] [2023-04-02 01:37:22,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:37:22,958 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:37:22,967 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/loops-crafted-1/mono-crafted_3.c[318,331] [2023-04-02 01:37:22,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:37:22,980 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:37:22,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22 WrapperNode [2023-04-02 01:37:22,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:37:22,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:37:22,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:37:22,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:37:22,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:22,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:23,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:23,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:23,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:37:23,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:37:23,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:37:23,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:37:23,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (1/1) ... [2023-04-02 01:37:23,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:37:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:23,027 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) [2023-04-02 01:37:23,028 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 [2023-04-02 01:37:23,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:37:23,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:37:23,060 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:37:23,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:37:23,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:37:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:37:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:37:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:37:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:37:23,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:37:23,114 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:37:23,116 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:37:23,289 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:37:23,294 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:37:23,294 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:37:23,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:37:23 BoogieIcfgContainer [2023-04-02 01:37:23,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:37:23,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:37:23,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:37:23,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:37:23,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:37:22" (1/3) ... [2023-04-02 01:37:23,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3149f131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:37:23, skipping insertion in model container [2023-04-02 01:37:23,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:37:22" (2/3) ... [2023-04-02 01:37:23,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3149f131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:37:23, skipping insertion in model container [2023-04-02 01:37:23,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:37:23" (3/3) ... [2023-04-02 01:37:23,303 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2023-04-02 01:37:23,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:37:23,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:37:23,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:37:23,394 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;@33d65430, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:37:23,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:37:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:37:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 01:37:23,411 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:23,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:23,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:23,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2023-04-02 01:37:23,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:23,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547920163] [2023-04-02 01:37:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:23,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:23,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:37:23,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547920163] [2023-04-02 01:37:23,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547920163] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:37:23,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:37:23,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:37:23,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639757645] [2023-04-02 01:37:23,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:37:23,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:37:23,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:37:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:37:23,651 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:23,700 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-02 01:37:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:37:23,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 01:37:23,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:23,707 INFO L225 Difference]: With dead ends: 34 [2023-04-02 01:37:23,707 INFO L226 Difference]: Without dead ends: 14 [2023-04-02 01:37:23,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:37:23,723 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:23,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 10 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:37:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-04-02 01:37:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-04-02 01:37:23,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:23,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-04-02 01:37:23,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2023-04-02 01:37:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:23,765 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-04-02 01:37:23,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-04-02 01:37:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 01:37:23,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:23,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:23,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:37:23,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:23,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2023-04-02 01:37:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368593659] [2023-04-02 01:37:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:23,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:23,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:37:23,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:23,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368593659] [2023-04-02 01:37:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368593659] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:37:23,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:37:23,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:37:23,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626806376] [2023-04-02 01:37:23,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:37:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:37:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:37:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:37:23,894 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:23,953 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2023-04-02 01:37:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:37:23,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-02 01:37:23,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:23,954 INFO L225 Difference]: With dead ends: 24 [2023-04-02 01:37:23,954 INFO L226 Difference]: Without dead ends: 16 [2023-04-02 01:37:23,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:37:23,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:23,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:37:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-02 01:37:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-02 01:37:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-04-02 01:37:23,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2023-04-02 01:37:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:23,963 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-04-02 01:37:23,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-04-02 01:37:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 01:37:23,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:23,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:23,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:37:23,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:23,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:23,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2023-04-02 01:37:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:23,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403069667] [2023-04-02 01:37:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:23,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:37:24,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403069667] [2023-04-02 01:37:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403069667] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:37:24,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:37:24,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:37:24,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192641754] [2023-04-02 01:37:24,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:37:24,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:37:24,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:24,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:37:24,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:37:24,014 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:24,045 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-04-02 01:37:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:37:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 01:37:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:24,046 INFO L225 Difference]: With dead ends: 22 [2023-04-02 01:37:24,046 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 01:37:24,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:37:24,047 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:24,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:37:24,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 01:37:24,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-02 01:37:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-04-02 01:37:24,053 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2023-04-02 01:37:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:24,053 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-04-02 01:37:24,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-04-02 01:37:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:37:24,054 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:24,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:24,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 01:37:24,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:24,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2119154711, now seen corresponding path program 1 times [2023-04-02 01:37:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:24,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003903824] [2023-04-02 01:37:24,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:24,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:37:24,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:24,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003903824] [2023-04-02 01:37:24,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003903824] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:24,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994023808] [2023-04-02 01:37:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:24,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:24,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:24,115 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) [2023-04-02 01:37:24,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:37:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-02 01:37:24,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:37:24,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:37:24,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994023808] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:24,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:24,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-02 01:37:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706149636] [2023-04-02 01:37:24,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:37:24,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:37:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:37:24,272 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:24,355 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2023-04-02 01:37:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:37:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:37:24,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:24,356 INFO L225 Difference]: With dead ends: 31 [2023-04-02 01:37:24,356 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 01:37:24,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:37:24,358 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:24,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:37:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 01:37:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 01:37:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-04-02 01:37:24,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2023-04-02 01:37:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:24,364 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-04-02 01:37:24,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-04-02 01:37:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 01:37:24,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:24,365 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:24,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:24,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:24,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:24,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:24,574 INFO L85 PathProgramCache]: Analyzing trace with hash 694051964, now seen corresponding path program 1 times [2023-04-02 01:37:24,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:24,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081580840] [2023-04-02 01:37:24,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:24,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:24,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:24,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081580840] [2023-04-02 01:37:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081580840] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:24,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123044002] [2023-04-02 01:37:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:24,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:24,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:24,680 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) [2023-04-02 01:37:24,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:37:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:24,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 01:37:24,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:24,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:24,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123044002] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:24,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:24,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-04-02 01:37:24,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846757399] [2023-04-02 01:37:24,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:24,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 01:37:24,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 01:37:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-04-02 01:37:24,821 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:24,923 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-04-02 01:37:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 01:37:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-02 01:37:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:24,925 INFO L225 Difference]: With dead ends: 42 [2023-04-02 01:37:24,925 INFO L226 Difference]: Without dead ends: 30 [2023-04-02 01:37:24,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:37:24,929 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:24,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 22 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:37:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-02 01:37:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-02 01:37:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-02 01:37:24,943 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2023-04-02 01:37:24,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:24,943 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-02 01:37:24,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-02 01:37:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:37:24,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:24,949 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:24,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:25,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:25,155 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:25,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1530073712, now seen corresponding path program 2 times [2023-04-02 01:37:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:25,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236129415] [2023-04-02 01:37:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:25,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:25,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:25,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236129415] [2023-04-02 01:37:25,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236129415] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:25,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825966460] [2023-04-02 01:37:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:37:25,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:25,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:25,329 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) [2023-04-02 01:37:25,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:37:25,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:37:25,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:37:25,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 01:37:25,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:25,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825966460] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:25,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:25,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-04-02 01:37:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104659022] [2023-04-02 01:37:25,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:25,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 01:37:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 01:37:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:37:25,549 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:25,783 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-04-02 01:37:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 01:37:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-02 01:37:25,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:25,786 INFO L225 Difference]: With dead ends: 58 [2023-04-02 01:37:25,786 INFO L226 Difference]: Without dead ends: 46 [2023-04-02 01:37:25,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2023-04-02 01:37:25,789 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:25,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:37:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-04-02 01:37:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-04-02 01:37:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-04-02 01:37:25,801 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2023-04-02 01:37:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:25,801 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-04-02 01:37:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-04-02 01:37:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:37:25,803 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:25,803 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:25,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:26,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:26,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:26,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1073294760, now seen corresponding path program 3 times [2023-04-02 01:37:26,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:26,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851648267] [2023-04-02 01:37:26,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:26,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:26,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:37:26,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851648267] [2023-04-02 01:37:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851648267] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626584901] [2023-04-02 01:37:26,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:37:26,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:26,263 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) [2023-04-02 01:37:26,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:37:26,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 01:37:26,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:37:26,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:37:26,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 01:37:26,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-04-02 01:37:26,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626584901] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:26,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:26,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2023-04-02 01:37:26,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730078396] [2023-04-02 01:37:26,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:26,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 01:37:26,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:26,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 01:37:26,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2023-04-02 01:37:26,500 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:26,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:26,862 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2023-04-02 01:37:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 01:37:26,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2023-04-02 01:37:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:26,864 INFO L225 Difference]: With dead ends: 69 [2023-04-02 01:37:26,864 INFO L226 Difference]: Without dead ends: 57 [2023-04-02 01:37:26,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=1308, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 01:37:26,865 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 32 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 [2023-04-02 01:37:26,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 32 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:37:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-04-02 01:37:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2023-04-02 01:37:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-04-02 01:37:26,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2023-04-02 01:37:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:26,874 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-04-02 01:37:26,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-04-02 01:37:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 01:37:26,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:26,875 INFO L195 NwaCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:26,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:27,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:27,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:27,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1292456146, now seen corresponding path program 4 times [2023-04-02 01:37:27,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:27,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755789348] [2023-04-02 01:37:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:27,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:27,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:27,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755789348] [2023-04-02 01:37:27,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755789348] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:27,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428530884] [2023-04-02 01:37:27,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:37:27,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:27,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:27,348 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) [2023-04-02 01:37:27,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:37:27,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:37:27,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:37:27,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:37:27,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:27,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:27,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428530884] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:27,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:27,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2023-04-02 01:37:27,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470030660] [2023-04-02 01:37:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:27,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-02 01:37:27,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-02 01:37:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 01:37:27,860 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:28,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:28,504 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2023-04-02 01:37:28,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 01:37:28,504 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-04-02 01:37:28,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:28,505 INFO L225 Difference]: With dead ends: 100 [2023-04-02 01:37:28,505 INFO L226 Difference]: Without dead ends: 85 [2023-04-02 01:37:28,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 01:37:28,508 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:28,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 27 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:37:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-04-02 01:37:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-04-02 01:37:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2023-04-02 01:37:28,519 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 50 [2023-04-02 01:37:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:28,519 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2023-04-02 01:37:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2023-04-02 01:37:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-02 01:37:28,521 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:28,521 INFO L195 NwaCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:28,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:28,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:28,726 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:28,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:28,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1446691295, now seen corresponding path program 5 times [2023-04-02 01:37:28,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:28,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132378625] [2023-04-02 01:37:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:28,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:29,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132378625] [2023-04-02 01:37:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132378625] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:29,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097172095] [2023-04-02 01:37:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:37:29,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:29,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:29,503 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) [2023-04-02 01:37:29,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:37:29,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2023-04-02 01:37:29,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:37:29,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-02 01:37:29,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:29,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:31,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097172095] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:31,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:31,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2023-04-02 01:37:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114534913] [2023-04-02 01:37:31,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:31,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-04-02 01:37:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:31,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-04-02 01:37:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2023-04-02 01:37:31,101 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:33,146 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2023-04-02 01:37:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-04-02 01:37:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2023-04-02 01:37:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:33,149 INFO L225 Difference]: With dead ends: 168 [2023-04-02 01:37:33,149 INFO L226 Difference]: Without dead ends: 153 [2023-04-02 01:37:33,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2023-04-02 01:37:33,156 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:33,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 27 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:37:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-04-02 01:37:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-04-02 01:37:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2023-04-02 01:37:33,172 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 84 [2023-04-02 01:37:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:33,173 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2023-04-02 01:37:33,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2023-04-02 01:37:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-02 01:37:33,175 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:33,175 INFO L195 NwaCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:33,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:33,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:33,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:33,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:33,387 INFO L85 PathProgramCache]: Analyzing trace with hash 83957191, now seen corresponding path program 6 times [2023-04-02 01:37:33,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:33,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179112985] [2023-04-02 01:37:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:33,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 01:37:35,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179112985] [2023-04-02 01:37:35,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179112985] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435177304] [2023-04-02 01:37:35,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:37:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:35,881 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) [2023-04-02 01:37:35,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:37:35,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-02 01:37:35,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:37:35,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 01:37:35,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2023-04-02 01:37:36,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2023-04-02 01:37:36,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435177304] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:36,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:36,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 8, 8] total 82 [2023-04-02 01:37:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70231836] [2023-04-02 01:37:36,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:36,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-04-02 01:37:36,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:36,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-04-02 01:37:36,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2438, Invalid=4204, Unknown=0, NotChecked=0, Total=6642 [2023-04-02 01:37:36,597 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:39,283 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2023-04-02 01:37:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-04-02 01:37:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2023-04-02 01:37:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:39,284 INFO L225 Difference]: With dead ends: 182 [2023-04-02 01:37:39,284 INFO L226 Difference]: Without dead ends: 167 [2023-04-02 01:37:39,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8562, Invalid=16878, Unknown=0, NotChecked=0, Total=25440 [2023-04-02 01:37:39,291 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 158 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:39,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 72 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:37:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-04-02 01:37:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2023-04-02 01:37:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2023-04-02 01:37:39,305 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 152 [2023-04-02 01:37:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:39,305 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2023-04-02 01:37:39,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2023-04-02 01:37:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-02 01:37:39,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:39,308 INFO L195 NwaCegarLoop]: trace histogram [69, 67, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:39,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-02 01:37:39,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:39,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:39,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:39,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1337358826, now seen corresponding path program 7 times [2023-04-02 01:37:39,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:39,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463691768] [2023-04-02 01:37:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:37:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:37:41,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:37:41,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463691768] [2023-04-02 01:37:41,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463691768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:37:41,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516666859] [2023-04-02 01:37:41,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:37:41,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:37:41,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:37:41,821 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) [2023-04-02 01:37:41,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 01:37:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:37:41,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 69 conjunts are in the unsatisfiable core [2023-04-02 01:37:41,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:37:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:37:42,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:37:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:37:46,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516666859] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:37:46,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:37:46,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2023-04-02 01:37:46,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711806865] [2023-04-02 01:37:46,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:37:46,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2023-04-02 01:37:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:37:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2023-04-02 01:37:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2023-04-02 01:37:46,497 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:37:52,895 INFO L93 Difference]: Finished difference Result 320 states and 395 transitions. [2023-04-02 01:37:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2023-04-02 01:37:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2023-04-02 01:37:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:37:52,897 INFO L225 Difference]: With dead ends: 320 [2023-04-02 01:37:52,897 INFO L226 Difference]: Without dead ends: 299 [2023-04-02 01:37:52,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2023-04-02 01:37:52,903 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 283 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:37:52,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 42 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:37:52,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-04-02 01:37:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2023-04-02 01:37:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2023-04-02 01:37:52,931 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 160 [2023-04-02 01:37:52,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:37:52,932 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2023-04-02 01:37:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:37:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2023-04-02 01:37:52,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-04-02 01:37:52,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:37:52,936 INFO L195 NwaCegarLoop]: trace histogram [138, 136, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:37:52,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 01:37:53,141 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,SelfDestructingSolverStorable10 [2023-04-02 01:37:53,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:37:53,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:37:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash 406418617, now seen corresponding path program 8 times [2023-04-02 01:37:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:37:53,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14383434] [2023-04-02 01:37:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:37:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:37:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:38:01,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:38:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:38:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:38:01,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:38:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14383434] [2023-04-02 01:38:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14383434] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:38:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898831005] [2023-04-02 01:38:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:38:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:38:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:38:01,805 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) [2023-04-02 01:38:01,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 01:38:01,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:38:01,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:38:01,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 138 conjunts are in the unsatisfiable core [2023-04-02 01:38:01,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:38:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:38:02,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:38:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:38:19,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898831005] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:38:19,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:38:19,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2023-04-02 01:38:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198219012] [2023-04-02 01:38:19,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:38:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2023-04-02 01:38:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:38:19,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2023-04-02 01:38:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2023-04-02 01:38:19,856 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:38:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:38:44,378 INFO L93 Difference]: Finished difference Result 596 states and 740 transitions. [2023-04-02 01:38:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2023-04-02 01:38:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2023-04-02 01:38:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:38:44,380 INFO L225 Difference]: With dead ends: 596 [2023-04-02 01:38:44,381 INFO L226 Difference]: Without dead ends: 575 [2023-04-02 01:38:44,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2023-04-02 01:38:44,394 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 559 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:38:44,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 42 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:38:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-04-02 01:38:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2023-04-02 01:38:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.0070175438596491) internal successors, (574), 570 states have internal predecessors, (574), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:38:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 578 transitions. [2023-04-02 01:38:44,432 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 578 transitions. Word has length 298 [2023-04-02 01:38:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:38:44,433 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 578 transitions. [2023-04-02 01:38:44,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:38:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 578 transitions. [2023-04-02 01:38:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2023-04-02 01:38:44,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:38:44,443 INFO L195 NwaCegarLoop]: trace histogram [276, 274, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:38:44,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 01:38:44,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:38:44,649 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:38:44,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:38:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -36624873, now seen corresponding path program 9 times [2023-04-02 01:38:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:38:44,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846808189] [2023-04-02 01:38:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:38:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:38:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:39:18,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:39:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:39:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-04-02 01:39:18,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:39:18,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846808189] [2023-04-02 01:39:18,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846808189] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:39:18,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638723658] [2023-04-02 01:39:18,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:39:18,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:39:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:39:18,437 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) [2023-04-02 01:39:18,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 01:39:18,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 01:39:18,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:39:18,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:39:18,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:39:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 826 proven. 55 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2023-04-02 01:39:20,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:39:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 826 proven. 55 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2023-04-02 01:39:21,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638723658] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:39:21,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:39:21,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 14, 14] total 302 [2023-04-02 01:39:21,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526622755] [2023-04-02 01:39:21,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:39:21,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 302 states [2023-04-02 01:39:21,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:39:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 302 interpolants. [2023-04-02 01:39:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38552, Invalid=52350, Unknown=0, NotChecked=0, Total=90902 [2023-04-02 01:39:21,853 INFO L87 Difference]: Start difference. First operand 575 states and 578 transitions. Second operand has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:39:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:39:57,094 INFO L93 Difference]: Finished difference Result 616 states and 638 transitions. [2023-04-02 01:39:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2023-04-02 01:39:57,095 INFO L78 Accepts]: Start accepts. Automaton has has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2023-04-02 01:39:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:39:57,097 INFO L225 Difference]: With dead ends: 616 [2023-04-02 01:39:57,097 INFO L226 Difference]: Without dead ends: 595 [2023-04-02 01:39:57,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51594 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=127438, Invalid=231962, Unknown=0, NotChecked=0, Total=359400 [2023-04-02 01:39:57,114 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 586 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:39:57,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 57 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:39:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-04-02 01:39:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 589. [2023-04-02 01:39:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 584 states have (on average 1.0068493150684932) internal successors, (588), 584 states have internal predecessors, (588), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:39:57,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 592 transitions. [2023-04-02 01:39:57,151 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 592 transitions. Word has length 574 [2023-04-02 01:39:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:39:57,151 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 592 transitions. [2023-04-02 01:39:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:39:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 592 transitions. [2023-04-02 01:39:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2023-04-02 01:39:57,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:39:57,160 INFO L195 NwaCegarLoop]: trace histogram [277, 275, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:39:57,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 01:39:57,365 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,SelfDestructingSolverStorable12 [2023-04-02 01:39:57,366 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:39:57,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:39:57,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1763200410, now seen corresponding path program 10 times [2023-04-02 01:39:57,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:39:57,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168353717] [2023-04-02 01:39:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:39:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:39:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:40:31,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:40:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:40:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-02 01:40:31,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:40:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168353717] [2023-04-02 01:40:31,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168353717] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:40:31,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068969202] [2023-04-02 01:40:31,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:40:31,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:40:31,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:40:31,396 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) [2023-04-02 01:40:31,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 01:40:31,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:40:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:40:31,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 277 conjunts are in the unsatisfiable core [2023-04-02 01:40:31,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:40:32,237 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-02 01:40:32,237 INFO L327 TraceCheckSpWp]: Computing backward predicates...