/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:32:11,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:32:11,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:32:11,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:32:11,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:32:11,258 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:32:11,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:32:11,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:32:11,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:32:11,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:32:11,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:32:11,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:32:11,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:32:11,260 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:32:11,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:32:11,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:32:11,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:32:11,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:32:11,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:32:11,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:32:11,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:32:11,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:32:11,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:32:11,263 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:32:11,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:32:11,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:32:11,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:32:11,443 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:32:11,444 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:32:11,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2023-04-01 18:32:12,286 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:32:12,452 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:32:12,453 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2023-04-01 18:32:12,458 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5702913cf/2fdefcb73b164bdcb07717cee9c542d1/FLAG03946fba7 [2023-04-01 18:32:12,879 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5702913cf/2fdefcb73b164bdcb07717cee9c542d1 [2023-04-01 18:32:12,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:32:12,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:32:12,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:32:12,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:32:12,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:32:12,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:32:12" (1/1) ... [2023-04-01 18:32:12,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e43e508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:12, skipping insertion in model container [2023-04-01 18:32:12,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:32:12" (1/1) ... [2023-04-01 18:32:12,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:32:12,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:32:12,986 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2023-04-01 18:32:12,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:32:13,000 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:32:13,008 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2023-04-01 18:32:13,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:32:13,021 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:32:13,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13 WrapperNode [2023-04-01 18:32:13,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:32:13,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:32:13,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:32:13,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:32:13,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:32:13,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:32:13,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:32:13,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:32:13,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (1/1) ... [2023-04-01 18:32:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:32:13,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:13,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:32:13,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:32:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:32:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:32:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:32:13,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:32:13,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:32:13,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:32:13,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:32:13,190 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:32:13,192 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:32:13,401 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:32:13,405 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:32:13,406 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 18:32:13,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:32:13 BoogieIcfgContainer [2023-04-01 18:32:13,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:32:13,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:32:13,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:32:13,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:32:13,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:32:12" (1/3) ... [2023-04-01 18:32:13,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3148b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:32:13, skipping insertion in model container [2023-04-01 18:32:13,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:32:13" (2/3) ... [2023-04-01 18:32:13,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b3148b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:32:13, skipping insertion in model container [2023-04-01 18:32:13,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:32:13" (3/3) ... [2023-04-01 18:32:13,413 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2023-04-01 18:32:13,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:32:13,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:32:13,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:32:13,461 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;@47c51dac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:32:13,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:32:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:32:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 18:32:13,469 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:13,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:13,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:13,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1517825670, now seen corresponding path program 1 times [2023-04-01 18:32:13,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:13,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909224292] [2023-04-01 18:32:13,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:13,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:13,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:32:13,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:13,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909224292] [2023-04-01 18:32:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909224292] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:13,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:32:13,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:32:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739969762] [2023-04-01 18:32:13,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:13,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:32:13,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:13,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:32:13,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:32:13,654 INFO L87 Difference]: Start difference. First operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-04-01 18:32:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:13,718 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2023-04-01 18:32:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:32:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2023-04-01 18:32:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:13,725 INFO L225 Difference]: With dead ends: 56 [2023-04-01 18:32:13,725 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 18:32:13,727 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 [2023-04-01 18:32:13,729 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:13,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 18:32:13,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 18:32:13,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-04-01 18:32:13,757 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2023-04-01 18:32:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:13,757 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-04-01 18:32:13,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2023-04-01 18:32:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-04-01 18:32:13,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 18:32:13,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:13,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:32:13,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:13,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash -262391691, now seen corresponding path program 1 times [2023-04-01 18:32:13,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:13,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807273092] [2023-04-01 18:32:13,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:13,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:13,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:32:13,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:13,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807273092] [2023-04-01 18:32:13,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807273092] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:13,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:32:13,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:32:13,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563390115] [2023-04-01 18:32:13,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:13,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:32:13,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:13,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:32:13,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:32:13,831 INFO L87 Difference]: Start difference. First operand 27 states and 32 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) [2023-04-01 18:32:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:13,887 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-04-01 18:32:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:32:13,888 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 [2023-04-01 18:32:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:13,889 INFO L225 Difference]: With dead ends: 48 [2023-04-01 18:32:13,889 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 18:32:13,889 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 [2023-04-01 18:32:13,890 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:13,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 18:32:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-01 18:32:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-04-01 18:32:13,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2023-04-01 18:32:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:13,897 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-04-01 18:32:13,897 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) [2023-04-01 18:32:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-04-01 18:32:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:32:13,897 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:13,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:13,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:32:13,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:13,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1047137769, now seen corresponding path program 1 times [2023-04-01 18:32:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:13,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548667419] [2023-04-01 18:32:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:13,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:13,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:13,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:13,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548667419] [2023-04-01 18:32:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548667419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:13,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:32:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:32:13,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409440353] [2023-04-01 18:32:13,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:13,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:32:13,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:32:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:32:13,959 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-04-01 18:32:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:14,021 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-04-01 18:32:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:32:14,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2023-04-01 18:32:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:14,024 INFO L225 Difference]: With dead ends: 47 [2023-04-01 18:32:14,024 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:32:14,027 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 [2023-04-01 18:32:14,030 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:14,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:32:14,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 18:32:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-04-01 18:32:14,040 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2023-04-01 18:32:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:14,040 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-04-01 18:32:14,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-04-01 18:32:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-04-01 18:32:14,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 18:32:14,041 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:14,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:32:14,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash 263234845, now seen corresponding path program 1 times [2023-04-01 18:32:14,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396499603] [2023-04-01 18:32:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:14,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:14,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396499603] [2023-04-01 18:32:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396499603] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453611951] [2023-04-01 18:32:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:14,102 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:14,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:32:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:32:14,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:14,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453611951] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:14,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:32:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077086945] [2023-04-01 18:32:14,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:14,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:32:14,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:32:14,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:32:14,244 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-04-01 18:32:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:14,362 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-04-01 18:32:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:32:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 19 [2023-04-01 18:32:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:14,364 INFO L225 Difference]: With dead ends: 55 [2023-04-01 18:32:14,364 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 18:32:14,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:32:14,370 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:14,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:32:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 18:32:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 18:32:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-04-01 18:32:14,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 19 [2023-04-01 18:32:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:14,384 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-04-01 18:32:14,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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) [2023-04-01 18:32:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-04-01 18:32:14,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 18:32:14,386 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,386 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:14,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:32:14,591 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 [2023-04-01 18:32:14,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1983501961, now seen corresponding path program 2 times [2023-04-01 18:32:14,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266457024] [2023-04-01 18:32:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:32:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266457024] [2023-04-01 18:32:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266457024] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:14,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707188302] [2023-04-01 18:32:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:32:14,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:14,668 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:14,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:32:14,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-04-01 18:32:14,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:14,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:32:14,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 18:32:14,752 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:32:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707188302] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:32:14,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:32:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-01 18:32:14,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151622215] [2023-04-01 18:32:14,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:32:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:32:14,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:32:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:32:14,753 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:32:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:14,773 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-04-01 18:32:14,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:32:14,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 18:32:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:14,774 INFO L225 Difference]: With dead ends: 60 [2023-04-01 18:32:14,774 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 18:32:14,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:32:14,775 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:14,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:32:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 18:32:14,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2023-04-01 18:32:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-04-01 18:32:14,781 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 25 [2023-04-01 18:32:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:14,781 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-04-01 18:32:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:32:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-04-01 18:32:14,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 18:32:14,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:14,782 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:14,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:14,988 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 [2023-04-01 18:32:14,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:14,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1631406965, now seen corresponding path program 1 times [2023-04-01 18:32:14,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:14,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456230220] [2023-04-01 18:32:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:14,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:32:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456230220] [2023-04-01 18:32:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456230220] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:15,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192006523] [2023-04-01 18:32:15,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:15,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:15,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:15,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:32:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:32:15,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:15,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:32:15,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192006523] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:15,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:15,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 18:32:15,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874401967] [2023-04-01 18:32:15,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:15,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 18:32:15,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 18:32:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 18:32:15,267 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2023-04-01 18:32:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:15,489 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2023-04-01 18:32:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:32:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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 25 [2023-04-01 18:32:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:15,490 INFO L225 Difference]: With dead ends: 86 [2023-04-01 18:32:15,490 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 18:32:15,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2023-04-01 18:32:15,491 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:15,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:32:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 18:32:15,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-04-01 18:32:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2023-04-01 18:32:15,497 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 25 [2023-04-01 18:32:15,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:15,497 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2023-04-01 18:32:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2023-04-01 18:32:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2023-04-01 18:32:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 18:32:15,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:15,498 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:15,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:15,705 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 [2023-04-01 18:32:15,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:15,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash -724659961, now seen corresponding path program 1 times [2023-04-01 18:32:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:15,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202440860] [2023-04-01 18:32:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202440860] [2023-04-01 18:32:15,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202440860] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395698741] [2023-04-01 18:32:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:15,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:15,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:15,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:15,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:32:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:15,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:32:15,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:16,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:16,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395698741] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:16,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:16,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:32:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489694746] [2023-04-01 18:32:16,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:32:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:16,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:32:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:32:16,183 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2023-04-01 18:32:16,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:16,565 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2023-04-01 18:32:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:32:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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 40 [2023-04-01 18:32:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:16,568 INFO L225 Difference]: With dead ends: 111 [2023-04-01 18:32:16,568 INFO L226 Difference]: Without dead ends: 81 [2023-04-01 18:32:16,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:32:16,570 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:16,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:32:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-04-01 18:32:16,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-04-01 18:32:16,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-04-01 18:32:16,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 40 [2023-04-01 18:32:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:16,598 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-04-01 18:32:16,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 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) [2023-04-01 18:32:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-04-01 18:32:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 18:32:16,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:16,600 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:16,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:16,805 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 [2023-04-01 18:32:16,805 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:16,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:16,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1325815199, now seen corresponding path program 2 times [2023-04-01 18:32:16,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:16,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366594541] [2023-04-01 18:32:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:16,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:17,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:17,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:17,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366594541] [2023-04-01 18:32:17,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366594541] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:17,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479071712] [2023-04-01 18:32:17,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:32:17,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:17,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:17,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:17,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:32:17,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:32:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:17,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:32:17,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:17,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:17,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479071712] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:17,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:17,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:32:17,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085619410] [2023-04-01 18:32:17,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:32:17,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:17,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:32:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:32:17,976 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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) [2023-04-01 18:32:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:18,966 INFO L93 Difference]: Finished difference Result 159 states and 198 transitions. [2023-04-01 18:32:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:32:18,967 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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 64 [2023-04-01 18:32:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:18,969 INFO L225 Difference]: With dead ends: 159 [2023-04-01 18:32:18,969 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 18:32:18,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:32:18,973 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:18,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 17 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:32:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 18:32:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 18:32:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2023-04-01 18:32:18,987 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 64 [2023-04-01 18:32:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:18,988 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2023-04-01 18:32:18,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 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) [2023-04-01 18:32:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2023-04-01 18:32:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 18:32:18,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:18,989 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:18,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:19,194 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 [2023-04-01 18:32:19,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:19,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1874003663, now seen corresponding path program 3 times [2023-04-01 18:32:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:19,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233014206] [2023-04-01 18:32:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:20,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 18:32:20,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233014206] [2023-04-01 18:32:20,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233014206] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:20,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106000789] [2023-04-01 18:32:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:32:20,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:20,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:20,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:20,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:32:20,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:32:20,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:20,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 18:32:20,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-04-01 18:32:20,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2023-04-01 18:32:21,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106000789] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:21,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:21,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 5, 5] total 56 [2023-04-01 18:32:21,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122700821] [2023-04-01 18:32:21,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:21,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 18:32:21,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 18:32:21,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1875, Unknown=0, NotChecked=0, Total=3080 [2023-04-01 18:32:21,087 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand has 56 states, 56 states have (on average 2.3035714285714284) internal successors, (129), 55 states have internal predecessors, (129), 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) [2023-04-01 18:32:22,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:22,457 INFO L93 Difference]: Finished difference Result 186 states and 218 transitions. [2023-04-01 18:32:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-04-01 18:32:22,458 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.3035714285714284) internal successors, (129), 55 states have internal predecessors, (129), 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 112 [2023-04-01 18:32:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:22,460 INFO L225 Difference]: With dead ends: 186 [2023-04-01 18:32:22,460 INFO L226 Difference]: Without dead ends: 156 [2023-04-01 18:32:22,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4173, Invalid=7599, Unknown=0, NotChecked=0, Total=11772 [2023-04-01 18:32:22,464 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:22,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 37 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:32:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-04-01 18:32:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2023-04-01 18:32:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.1081081081081081) internal successors, (164), 148 states have internal predecessors, (164), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2023-04-01 18:32:22,473 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 112 [2023-04-01 18:32:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:22,473 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2023-04-01 18:32:22,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.3035714285714284) internal successors, (129), 55 states have internal predecessors, (129), 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) [2023-04-01 18:32:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2023-04-01 18:32:22,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 18:32:22,481 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:22,481 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:22,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 18:32:22,686 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 [2023-04-01 18:32:22,687 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:22,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -696655247, now seen corresponding path program 4 times [2023-04-01 18:32:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:22,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510585636] [2023-04-01 18:32:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:23,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:32:23,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:23,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510585636] [2023-04-01 18:32:23,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510585636] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:23,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335030294] [2023-04-01 18:32:23,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:32:23,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:23,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:23,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:32:24,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:32:24,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:32:24,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 18:32:24,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:32:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:32:24,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:32:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2260 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:32:26,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335030294] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:32:26,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:32:26,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2023-04-01 18:32:26,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618295168] [2023-04-01 18:32:26,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:32:26,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-04-01 18:32:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:32:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-04-01 18:32:26,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 18:32:26,284 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 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) [2023-04-01 18:32:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:32:29,306 INFO L93 Difference]: Finished difference Result 307 states and 387 transitions. [2023-04-01 18:32:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-04-01 18:32:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 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 126 [2023-04-01 18:32:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:32:29,308 INFO L225 Difference]: With dead ends: 307 [2023-04-01 18:32:29,308 INFO L226 Difference]: Without dead ends: 253 [2023-04-01 18:32:29,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2023-04-01 18:32:29,313 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:32:29,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 27 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:32:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-04-01 18:32:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2023-04-01 18:32:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 246 states have (on average 1.065040650406504) internal successors, (262), 246 states have internal predecessors, (262), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:32:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 269 transitions. [2023-04-01 18:32:29,326 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 269 transitions. Word has length 126 [2023-04-01 18:32:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:32:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 269 transitions. [2023-04-01 18:32:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.08) internal successors, (208), 99 states have internal predecessors, (208), 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) [2023-04-01 18:32:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 269 transitions. [2023-04-01 18:32:29,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-04-01 18:32:29,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:32:29,328 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:32:29,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:32:29,529 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 [2023-04-01 18:32:29,529 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:32:29,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:32:29,529 INFO L85 PathProgramCache]: Analyzing trace with hash 95437427, now seen corresponding path program 5 times [2023-04-01 18:32:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:32:29,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279040791] [2023-04-01 18:32:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:32:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:32:29,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:33,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:32:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:32:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-04-01 18:32:33,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:32:33,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279040791] [2023-04-01 18:32:33,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279040791] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:32:33,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217035374] [2023-04-01 18:32:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:32:33,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:32:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:32:33,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:32:33,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process