/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_running-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:10:21,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:10:21,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:10:21,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:10:21,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-30 22:10:21,522 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:10:21,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:10:21,523 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:10:21,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:10:21,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:10:21,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:10:21,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:10:21,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:10:21,525 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:10:21,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:10:21,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:10:21,527 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:10:21,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:10:21,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:10:21,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:10:21,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:10:21,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:10:21,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:10:21,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:10:21,528 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:10:21,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:10:21,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:10:21,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:10:21,776 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:10:21,776 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:10:21,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-1.i [2023-03-30 22:10:23,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:10:23,196 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:10:23,196 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-1.i [2023-03-30 22:10:23,201 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650fdc1cb/7b5331b6d0c441f09f82bdc45cd9b652/FLAG70679b649 [2023-03-30 22:10:23,215 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650fdc1cb/7b5331b6d0c441f09f82bdc45cd9b652 [2023-03-30 22:10:23,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:10:23,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:10:23,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:10:23,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:10:23,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:10:23,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f1b4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23, skipping insertion in model container [2023-03-30 22:10:23,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:10:23,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:10:23,351 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_running-1.i[811,824] [2023-03-30 22:10:23,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:10:23,370 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:10:23,379 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_running-1.i[811,824] [2023-03-30 22:10:23,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:10:23,398 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:10:23,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23 WrapperNode [2023-03-30 22:10:23,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:10:23,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:10:23,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:10:23,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:10:23,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,430 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:10:23,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:10:23,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:10:23,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:10:23,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (1/1) ... [2023-03-30 22:10:23,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:10:23,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:23,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:10:23,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-30 22:10:23,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:10:23,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:10:23,482 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:10:23,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:10:23,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:10:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:10:23,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:10:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:10:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:10:23,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:10:23,528 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:10:23,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:10:23,631 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:10:23,635 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:10:23,635 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:10:23,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:10:23 BoogieIcfgContainer [2023-03-30 22:10:23,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:10:23,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:10:23,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:10:23,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:10:23,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:10:23" (1/3) ... [2023-03-30 22:10:23,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3107aa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:10:23, skipping insertion in model container [2023-03-30 22:10:23,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:10:23" (2/3) ... [2023-03-30 22:10:23,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3107aa30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:10:23, skipping insertion in model container [2023-03-30 22:10:23,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:10:23" (3/3) ... [2023-03-30 22:10:23,641 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_running-1.i [2023-03-30 22:10:23,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:10:23,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:10:23,684 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:10:23,688 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;@59f70e02, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:10:23,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:10:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-30 22:10:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:10:23,720 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:23,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:23,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:23,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1480627234, now seen corresponding path program 1 times [2023-03-30 22:10:23,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:23,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647409445] [2023-03-30 22:10:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:23,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:23,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:10:23,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647409445] [2023-03-30 22:10:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647409445] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:10:23,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:10:23,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:10:23,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079358859] [2023-03-30 22:10:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:10:23,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:10:23,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:23,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:10:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:10:23,912 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-03-30 22:10:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:24,019 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2023-03-30 22:10:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:10:24,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2023-03-30 22:10:24,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:24,029 INFO L225 Difference]: With dead ends: 56 [2023-03-30 22:10:24,029 INFO L226 Difference]: Without dead ends: 25 [2023-03-30 22:10:24,031 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 [2023-03-30 22:10:24,037 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:24,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:10:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-30 22:10:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-03-30 22:10:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-03-30 22:10:24,075 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15 [2023-03-30 22:10:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:24,076 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-03-30 22:10:24,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2023-03-30 22:10:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-03-30 22:10:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-30 22:10:24,076 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:24,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:24,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:10:24,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:24,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1732153775, now seen corresponding path program 1 times [2023-03-30 22:10:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941079057] [2023-03-30 22:10:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:24,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:24,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:10:24,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:24,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941079057] [2023-03-30 22:10:24,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941079057] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:10:24,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:10:24,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:10:24,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428772311] [2023-03-30 22:10:24,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:10:24,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:10:24,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:24,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:10:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:10:24,200 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-03-30 22:10:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:24,299 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-03-30 22:10:24,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:10:24,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2023-03-30 22:10:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:24,300 INFO L225 Difference]: With dead ends: 54 [2023-03-30 22:10:24,300 INFO L226 Difference]: Without dead ends: 37 [2023-03-30 22:10:24,300 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 [2023-03-30 22:10:24,301 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:24,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:10:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-30 22:10:24,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2023-03-30 22:10:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-03-30 22:10:24,308 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2023-03-30 22:10:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:24,311 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-03-30 22:10:24,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-03-30 22:10:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-03-30 22:10:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:10:24,312 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:24,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:24,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:10:24,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:24,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:24,313 INFO L85 PathProgramCache]: Analyzing trace with hash -562644404, now seen corresponding path program 1 times [2023-03-30 22:10:24,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:24,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487085757] [2023-03-30 22:10:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:24,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:10:24,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:24,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487085757] [2023-03-30 22:10:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487085757] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:10:24,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628969156] [2023-03-30 22:10:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:24,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:24,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:10:24,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:10:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:24,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:10:24,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:10:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:10:24,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:10:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:10:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628969156] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:10:24,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:10:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:10:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602970082] [2023-03-30 22:10:24,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:10:24,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:10:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:10:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:10:24,554 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-03-30 22:10:24,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:24,681 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2023-03-30 22:10:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:10:24,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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 27 [2023-03-30 22:10:24,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:24,682 INFO L225 Difference]: With dead ends: 83 [2023-03-30 22:10:24,683 INFO L226 Difference]: Without dead ends: 64 [2023-03-30 22:10:24,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:10:24,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 187 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:24,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 17 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:10:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-03-30 22:10:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-03-30 22:10:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 59 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:24,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2023-03-30 22:10:24,693 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 27 [2023-03-30 22:10:24,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:24,693 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2023-03-30 22:10:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 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) [2023-03-30 22:10:24,693 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2023-03-30 22:10:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-30 22:10:24,694 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:24,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:24,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-30 22:10:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:24,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:24,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1214563977, now seen corresponding path program 2 times [2023-03-30 22:10:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:24,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568711044] [2023-03-30 22:10:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-03-30 22:10:25,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:25,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568711044] [2023-03-30 22:10:25,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568711044] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:10:25,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:10:25,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:10:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255089947] [2023-03-30 22:10:25,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:10:25,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:10:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:10:25,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:10:25,112 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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) [2023-03-30 22:10:25,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:25,213 INFO L93 Difference]: Finished difference Result 117 states and 168 transitions. [2023-03-30 22:10:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:10:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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 63 [2023-03-30 22:10:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:25,214 INFO L225 Difference]: With dead ends: 117 [2023-03-30 22:10:25,214 INFO L226 Difference]: Without dead ends: 88 [2023-03-30 22:10:25,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-30 22:10:25,215 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:25,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 20 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:10:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-03-30 22:10:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2023-03-30 22:10:25,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2023-03-30 22:10:25,223 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 63 [2023-03-30 22:10:25,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:25,223 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2023-03-30 22:10:25,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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) [2023-03-30 22:10:25,223 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2023-03-30 22:10:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-30 22:10:25,224 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:25,224 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:25,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 22:10:25,225 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:25,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:25,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1407530633, now seen corresponding path program 1 times [2023-03-30 22:10:25,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:25,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626117223] [2023-03-30 22:10:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:25,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:25,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-03-30 22:10:25,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626117223] [2023-03-30 22:10:25,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626117223] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:10:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047726760] [2023-03-30 22:10:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:25,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:25,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:10:25,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:10:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:25,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:10:25,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:10:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-03-30 22:10:25,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:10:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-03-30 22:10:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047726760] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:10:25,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:10:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-03-30 22:10:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983982289] [2023-03-30 22:10:25,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:10:25,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:10:25,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:25,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:10:25,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:10:25,530 INFO L87 Difference]: Start difference. First operand 80 states and 106 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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) [2023-03-30 22:10:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:25,813 INFO L93 Difference]: Finished difference Result 241 states and 346 transitions. [2023-03-30 22:10:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:10:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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 63 [2023-03-30 22:10:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:25,816 INFO L225 Difference]: With dead ends: 241 [2023-03-30 22:10:25,816 INFO L226 Difference]: Without dead ends: 176 [2023-03-30 22:10:25,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:10:25,818 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 406 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:25,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 27 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:10:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-03-30 22:10:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2023-03-30 22:10:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.368421052631579) internal successors, (234), 171 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 238 transitions. [2023-03-30 22:10:25,837 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 238 transitions. Word has length 63 [2023-03-30 22:10:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:25,837 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 238 transitions. [2023-03-30 22:10:25,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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) [2023-03-30 22:10:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 238 transitions. [2023-03-30 22:10:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-03-30 22:10:25,839 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:25,839 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:25,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:10:26,041 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 [2023-03-30 22:10:26,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:26,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:26,042 INFO L85 PathProgramCache]: Analyzing trace with hash -90989603, now seen corresponding path program 2 times [2023-03-30 22:10:26,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:26,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026109190] [2023-03-30 22:10:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:26,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-03-30 22:10:26,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:26,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026109190] [2023-03-30 22:10:26,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026109190] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:10:26,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576358215] [2023-03-30 22:10:26,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:10:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:26,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:10:26,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:10:26,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:10:26,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:10:26,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:10:26,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:10:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-03-30 22:10:26,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:10:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2023-03-30 22:10:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576358215] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:10:26,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:10:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-30 22:10:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323261423] [2023-03-30 22:10:26,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:10:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:10:26,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:10:26,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:10:26,726 INFO L87 Difference]: Start difference. First operand 176 states and 238 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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) [2023-03-30 22:10:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:27,478 INFO L93 Difference]: Finished difference Result 517 states and 748 transitions. [2023-03-30 22:10:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:10:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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 135 [2023-03-30 22:10:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:27,481 INFO L225 Difference]: With dead ends: 517 [2023-03-30 22:10:27,481 INFO L226 Difference]: Without dead ends: 368 [2023-03-30 22:10:27,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-03-30 22:10:27,486 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1143 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:27,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1143 Valid, 32 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:10:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-03-30 22:10:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2023-03-30 22:10:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.371900826446281) internal successors, (498), 363 states have internal predecessors, (498), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 502 transitions. [2023-03-30 22:10:27,507 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 502 transitions. Word has length 135 [2023-03-30 22:10:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:27,507 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 502 transitions. [2023-03-30 22:10:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 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) [2023-03-30 22:10:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 502 transitions. [2023-03-30 22:10:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-03-30 22:10:27,510 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:27,510 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:27,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:10:27,715 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 [2023-03-30 22:10:27,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:27,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:27,716 INFO L85 PathProgramCache]: Analyzing trace with hash -962330491, now seen corresponding path program 3 times [2023-03-30 22:10:27,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227756965] [2023-03-30 22:10:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2354 trivial. 0 not checked. [2023-03-30 22:10:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227756965] [2023-03-30 22:10:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227756965] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:10:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297610489] [2023-03-30 22:10:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:10:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:28,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:10:28,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:10:28,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:10:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:10:28,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-30 22:10:28,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:10:28,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-30 22:10:29,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:10:29,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2023-03-30 22:10:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 85 proven. 127 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2023-03-30 22:10:29,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:10:30,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-03-30 22:10:30,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2023-03-30 22:10:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 64 proven. 148 refuted. 0 times theorem prover too weak. 2626 trivial. 0 not checked. [2023-03-30 22:10:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297610489] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:10:30,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:10:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 38 [2023-03-30 22:10:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394653823] [2023-03-30 22:10:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:10:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-03-30 22:10:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:30,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-03-30 22:10:30,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=890, Unknown=0, NotChecked=0, Total=1406 [2023-03-30 22:10:30,651 INFO L87 Difference]: Start difference. First operand 368 states and 502 transitions. Second operand has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 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) [2023-03-30 22:10:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:33,753 INFO L93 Difference]: Finished difference Result 1085 states and 1536 transitions. [2023-03-30 22:10:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-03-30 22:10:33,754 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 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 279 [2023-03-30 22:10:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:33,757 INFO L225 Difference]: With dead ends: 1085 [2023-03-30 22:10:33,757 INFO L226 Difference]: Without dead ends: 768 [2023-03-30 22:10:33,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 571 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5744 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5778, Invalid=13962, Unknown=0, NotChecked=0, Total=19740 [2023-03-30 22:10:33,765 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3046 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3046 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:33,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3046 Valid, 43 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-30 22:10:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2023-03-30 22:10:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 695. [2023-03-30 22:10:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 690 states have (on average 1.4057971014492754) internal successors, (970), 690 states have internal predecessors, (970), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 974 transitions. [2023-03-30 22:10:33,783 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 974 transitions. Word has length 279 [2023-03-30 22:10:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:33,784 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 974 transitions. [2023-03-30 22:10:33,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 37 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) [2023-03-30 22:10:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 974 transitions. [2023-03-30 22:10:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2023-03-30 22:10:33,791 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:33,791 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:33,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:10:33,996 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 [2023-03-30 22:10:33,996 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:33,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:33,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1462011622, now seen corresponding path program 1 times [2023-03-30 22:10:33,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:33,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132523361] [2023-03-30 22:10:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:34,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-03-30 22:10:34,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132523361] [2023-03-30 22:10:34,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132523361] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:10:34,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839524987] [2023-03-30 22:10:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:34,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:34,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:34,953 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:10:34,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:10:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:35,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-30 22:10:35,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:10:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-03-30 22:10:35,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:10:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3050 trivial. 0 not checked. [2023-03-30 22:10:35,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839524987] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:10:35,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:10:35,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2023-03-30 22:10:35,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959707556] [2023-03-30 22:10:35,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:10:35,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-03-30 22:10:35,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:35,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-03-30 22:10:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2023-03-30 22:10:35,904 INFO L87 Difference]: Start difference. First operand 695 states and 974 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 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) [2023-03-30 22:10:37,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:37,856 INFO L93 Difference]: Finished difference Result 2396 states and 3385 transitions. [2023-03-30 22:10:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-03-30 22:10:37,856 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 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 315 [2023-03-30 22:10:37,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:37,861 INFO L225 Difference]: With dead ends: 2396 [2023-03-30 22:10:37,861 INFO L226 Difference]: Without dead ends: 1758 [2023-03-30 22:10:37,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4348, Invalid=7208, Unknown=0, NotChecked=0, Total=11556 [2023-03-30 22:10:37,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3876 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3876 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:37,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3876 Valid, 27 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:10:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2023-03-30 22:10:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1424. [2023-03-30 22:10:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1419 states have (on average 1.4066243833685694) internal successors, (1996), 1419 states have internal predecessors, (1996), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2000 transitions. [2023-03-30 22:10:37,897 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2000 transitions. Word has length 315 [2023-03-30 22:10:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:37,898 INFO L495 AbstractCegarLoop]: Abstraction has 1424 states and 2000 transitions. [2023-03-30 22:10:37,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 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) [2023-03-30 22:10:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2000 transitions. [2023-03-30 22:10:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2023-03-30 22:10:37,905 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:37,906 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:37,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:10:38,112 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 [2023-03-30 22:10:38,112 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:38,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 328960871, now seen corresponding path program 2 times [2023-03-30 22:10:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:38,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241944635] [2023-03-30 22:10:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:38,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:41,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:10:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:10:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-03-30 22:10:41,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:10:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241944635] [2023-03-30 22:10:41,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241944635] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:10:41,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653667779] [2023-03-30 22:10:41,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:10:41,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:10:41,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:10:41,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:10:41,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:10:41,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:10:41,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:10:41,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 2005 conjuncts, 54 conjunts are in the unsatisfiable core [2023-03-30 22:10:41,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:10:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-03-30 22:10:41,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:10:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16068 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 13364 trivial. 0 not checked. [2023-03-30 22:10:44,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653667779] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:10:44,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:10:44,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2023-03-30 22:10:44,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873985135] [2023-03-30 22:10:44,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:10:44,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-03-30 22:10:44,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:10:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-03-30 22:10:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2023-03-30 22:10:44,222 INFO L87 Difference]: Start difference. First operand 1424 states and 2000 transitions. Second operand has 110 states, 110 states have (on average 2.1454545454545455) internal successors, (236), 109 states have internal predecessors, (236), 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) [2023-03-30 22:10:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:10:54,271 INFO L93 Difference]: Finished difference Result 4853 states and 6868 transitions. [2023-03-30 22:10:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-03-30 22:10:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.1454545454545455) internal successors, (236), 109 states have internal predecessors, (236), 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 639 [2023-03-30 22:10:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:10:54,280 INFO L225 Difference]: With dead ends: 4853 [2023-03-30 22:10:54,280 INFO L226 Difference]: Without dead ends: 3540 [2023-03-30 22:10:54,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1226 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7255 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17443, Invalid=28997, Unknown=0, NotChecked=0, Total=46440 [2023-03-30 22:10:54,286 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7940 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1879 mSolverCounterSat, 1055 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7940 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1055 IncrementalHoareTripleChecker+Valid, 1879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:10:54,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7940 Valid, 52 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1055 Valid, 1879 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-30 22:10:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3540 states. [2023-03-30 22:10:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3540 to 2882. [2023-03-30 22:10:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2877 states have (on average 1.4070212026416407) internal successors, (4048), 2877 states have internal predecessors, (4048), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 22:10:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 4052 transitions. [2023-03-30 22:10:54,352 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 4052 transitions. Word has length 639 [2023-03-30 22:10:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:10:54,353 INFO L495 AbstractCegarLoop]: Abstraction has 2882 states and 4052 transitions. [2023-03-30 22:10:54,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.1454545454545455) internal successors, (236), 109 states have internal predecessors, (236), 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) [2023-03-30 22:10:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 4052 transitions. [2023-03-30 22:10:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1288 [2023-03-30 22:10:54,386 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:10:54,386 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:10:54,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-30 22:10:54,594 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 [2023-03-30 22:10:54,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:10:54,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:10:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1238711461, now seen corresponding path program 3 times [2023-03-30 22:10:54,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:10:54,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313616544] [2023-03-30 22:10:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:10:54,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:10:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:11:05,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:11:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:11:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 55862 trivial. 0 not checked. [2023-03-30 22:11:05,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:11:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313616544] [2023-03-30 22:11:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313616544] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:11:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484470120] [2023-03-30 22:11:05,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:11:05,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:11:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:11:05,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 22:11:05,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:11:06,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-30 22:11:06,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:11:06,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-30 22:11:06,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:11:06,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-03-30 22:11:06,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-03-30 22:11:12,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:11:12,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2023-03-30 22:11:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2023-03-30 22:11:12,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:11:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 67098 backedges. 523 proven. 1363 refuted. 0 times theorem prover too weak. 65212 trivial. 0 not checked. [2023-03-30 22:11:18,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484470120] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:11:18,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:11:18,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 12, 12] total 125 [2023-03-30 22:11:18,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25939465] [2023-03-30 22:11:18,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:11:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-03-30 22:11:18,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:11:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-03-30 22:11:18,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6910, Invalid=8589, Unknown=1, NotChecked=0, Total=15500 [2023-03-30 22:11:18,899 INFO L87 Difference]: Start difference. First operand 2882 states and 4052 transitions. Second operand has 125 states, 125 states have (on average 2.288) internal successors, (286), 124 states have internal predecessors, (286), 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)