/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_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:31:44,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:31:44,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:31:44,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:31:44,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:31:44,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:31:44,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:31:44,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:31:44,561 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:31:44,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:31:44,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:31:44,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:31:44,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:31:44,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:31:44,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:31:44,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:31:44,564 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:31:44,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:31:44,564 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:31:44,565 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:31:44,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:31:44,566 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:31:44,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:31:44,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:31:44,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:31:44,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:31:44,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:31:44,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:31:44,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:31:44,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:31:44,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:31:44,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:31:44,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:31:44,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:31:44,568 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:31:44,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:31:44,569 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:31:44,569 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:31:44,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:31:44,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:31:44,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:31:44,828 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:31:44,828 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:31:44,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2023-04-01 18:31:45,970 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:31:46,134 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:31:46,135 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_minInArray_ground-2.i [2023-04-01 18:31:46,141 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89e137cb/c61a87eed6bc4977977458bc9aa25c45/FLAG7854c01ee [2023-04-01 18:31:46,153 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e89e137cb/c61a87eed6bc4977977458bc9aa25c45 [2023-04-01 18:31:46,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:31:46,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:31:46,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:31:46,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:31:46,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:31:46,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3447e14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46, skipping insertion in model container [2023-04-01 18:31:46,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:31:46,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:31:46,291 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_minInArray_ground-2.i[821,834] [2023-04-01 18:31:46,301 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:31:46,308 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:31:46,316 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_minInArray_ground-2.i[821,834] [2023-04-01 18:31:46,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:31:46,332 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:31:46,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46 WrapperNode [2023-04-01 18:31:46,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:31:46,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:31:46,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:31:46,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:31:46,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,357 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:31:46,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:31:46,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:31:46,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:31:46,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (1/1) ... [2023-04-01 18:31:46,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:31:46,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:46,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:31:46,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:31:46,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:31:46,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:31:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:31:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:31:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:31:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:31:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:31:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:31:46,477 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:31:46,479 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:31:46,582 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:31:46,586 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:31:46,587 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:31:46,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:31:46 BoogieIcfgContainer [2023-04-01 18:31:46,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:31:46,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:31:46,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:31:46,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:31:46,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:31:46" (1/3) ... [2023-04-01 18:31:46,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1406c0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:31:46, skipping insertion in model container [2023-04-01 18:31:46,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:31:46" (2/3) ... [2023-04-01 18:31:46,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1406c0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:31:46, skipping insertion in model container [2023-04-01 18:31:46,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:31:46" (3/3) ... [2023-04-01 18:31:46,596 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2023-04-01 18:31:46,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:31:46,611 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:31:46,650 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:31:46,655 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;@55c8f06b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:31:46,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:31:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:31:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:31:46,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:46,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:46,666 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:46,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1266308725, now seen corresponding path program 1 times [2023-04-01 18:31:46,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:46,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297888895] [2023-04-01 18:31:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:46,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:46,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:46,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297888895] [2023-04-01 18:31:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297888895] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:31:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:31:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210682231] [2023-04-01 18:31:46,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:46,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:31:46,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:46,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:31:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:31:46,909 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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) [2023-04-01 18:31:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:47,028 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-04-01 18:31:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:31:47,033 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 [2023-04-01 18:31:47,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:47,038 INFO L225 Difference]: With dead ends: 48 [2023-04-01 18:31:47,038 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 18:31:47,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:31:47,044 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:47,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 10 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 18:31:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-01 18:31:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 18:31:47,094 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2023-04-01 18:31:47,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:47,095 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 18:31:47,095 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) [2023-04-01 18:31:47,095 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 18:31:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:31:47,096 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:47,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:31:47,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:47,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -184122438, now seen corresponding path program 1 times [2023-04-01 18:31:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:47,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488066982] [2023-04-01 18:31:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:47,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:47,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:31:47,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488066982] [2023-04-01 18:31:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488066982] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:31:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:31:47,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:31:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405849115] [2023-04-01 18:31:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:31:47,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:31:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:47,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:31:47,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:31:47,254 INFO L87 Difference]: Start difference. First operand 23 states and 26 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) [2023-04-01 18:31:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:47,341 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2023-04-01 18:31:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:31:47,342 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 [2023-04-01 18:31:47,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:47,344 INFO L225 Difference]: With dead ends: 43 [2023-04-01 18:31:47,344 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 18:31:47,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:31:47,352 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:47,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:47,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 18:31:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-04-01 18:31:47,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-04-01 18:31:47,359 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2023-04-01 18:31:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:47,359 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-04-01 18:31:47,359 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) [2023-04-01 18:31:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-04-01 18:31:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:31:47,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:47,360 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] [2023-04-01 18:31:47,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:31:47,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:47,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1441731324, now seen corresponding path program 1 times [2023-04-01 18:31:47,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:47,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378500480] [2023-04-01 18:31:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:47,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:47,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378500480] [2023-04-01 18:31:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378500480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035777068] [2023-04-01 18:31:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:47,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:47,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:47,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:47,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:31:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:47,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:31:47,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:47,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:31:47,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035777068] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:47,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:47,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:31:47,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070812916] [2023-04-01 18:31:47,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:47,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:31:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:31:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:31:47,624 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:47,730 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-04-01 18:31:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:31:47,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 20 [2023-04-01 18:31:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:47,732 INFO L225 Difference]: With dead ends: 56 [2023-04-01 18:31:47,732 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 18:31:47,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:31:47,734 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:47,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 18:31:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 18:31:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-04-01 18:31:47,742 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2023-04-01 18:31:47,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:47,743 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-04-01 18:31:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-04-01 18:31:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 18:31:47,744 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:47,744 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:47,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:31:47,949 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 [2023-04-01 18:31:47,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:47,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1192961330, now seen corresponding path program 2 times [2023-04-01 18:31:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176909963] [2023-04-01 18:31:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:48,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:31:48,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:48,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176909963] [2023-04-01 18:31:48,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176909963] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:48,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186036336] [2023-04-01 18:31:48,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:31:48,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:48,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:48,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:48,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:31:48,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:31:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:48,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:31:48,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:31:48,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 18:31:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186036336] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:48,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:48,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:31:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367824295] [2023-04-01 18:31:48,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:48,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:31:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:31:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:31:48,389 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:48,629 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2023-04-01 18:31:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:31:48,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 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 35 [2023-04-01 18:31:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:48,631 INFO L225 Difference]: With dead ends: 95 [2023-04-01 18:31:48,631 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 18:31:48,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:31:48,634 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:48,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 22 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:31:48,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 18:31:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-01 18:31:48,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2023-04-01 18:31:48,659 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 35 [2023-04-01 18:31:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:48,659 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2023-04-01 18:31:48,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2023-04-01 18:31:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:31:48,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:48,665 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:48,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:48,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 18:31:48,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:48,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1531507558, now seen corresponding path program 3 times [2023-04-01 18:31:48,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:48,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970150247] [2023-04-01 18:31:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:48,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:49,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-04-01 18:31:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970150247] [2023-04-01 18:31:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970150247] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665669575] [2023-04-01 18:31:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:31:49,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:49,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:49,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:31:49,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-04-01 18:31:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:49,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:31:49,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 18:31:49,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 18:31:49,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665669575] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:49,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:49,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:31:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322292040] [2023-04-01 18:31:49,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:49,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:31:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:49,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:31:49,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:31:49,634 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:50,227 INFO L93 Difference]: Finished difference Result 173 states and 232 transitions. [2023-04-01 18:31:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:31:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 25 states have internal predecessors, (103), 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 65 [2023-04-01 18:31:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:50,231 INFO L225 Difference]: With dead ends: 173 [2023-04-01 18:31:50,231 INFO L226 Difference]: Without dead ends: 130 [2023-04-01 18:31:50,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:31:50,233 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 252 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 17 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:31:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-04-01 18:31:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2023-04-01 18:31:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2023-04-01 18:31:50,263 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 65 [2023-04-01 18:31:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:50,263 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2023-04-01 18:31:50,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 25 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2023-04-01 18:31:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-01 18:31:50,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:50,270 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:50,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:50,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:50,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:50,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:50,477 INFO L85 PathProgramCache]: Analyzing trace with hash -297605170, now seen corresponding path program 4 times [2023-04-01 18:31:50,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:50,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784294004] [2023-04-01 18:31:50,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:51,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:51,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:51,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784294004] [2023-04-01 18:31:51,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784294004] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:51,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21388554] [2023-04-01 18:31:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:31:51,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:51,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:51,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:31:51,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:31:51,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:31:51,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:31:51,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:31:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:51,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:31:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-04-01 18:31:52,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21388554] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:31:52,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:31:52,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:31:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192962842] [2023-04-01 18:31:52,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:31:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:31:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:31:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:31:52,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:31:52,320 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:53,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:31:53,872 INFO L93 Difference]: Finished difference Result 329 states and 448 transitions. [2023-04-01 18:31:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:31:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2023-04-01 18:31:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:31:53,874 INFO L225 Difference]: With dead ends: 329 [2023-04-01 18:31:53,874 INFO L226 Difference]: Without dead ends: 250 [2023-04-01 18:31:53,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:31:53,878 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 714 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:31:53,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 37 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:31:53,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-04-01 18:31:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2023-04-01 18:31:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.2008196721311475) internal successors, (293), 244 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:31:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 298 transitions. [2023-04-01 18:31:53,893 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 298 transitions. Word has length 125 [2023-04-01 18:31:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:31:53,893 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 298 transitions. [2023-04-01 18:31:53,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:31:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 298 transitions. [2023-04-01 18:31:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-04-01 18:31:53,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:31:53,896 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:31:53,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:31:54,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:54,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:31:54,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:31:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1565733022, now seen corresponding path program 5 times [2023-04-01 18:31:54,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:31:54,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148081773] [2023-04-01 18:31:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:31:54,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:31:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:56,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:31:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:31:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:31:56,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:31:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148081773] [2023-04-01 18:31:56,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148081773] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:31:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096550652] [2023-04-01 18:31:56,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:31:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:31:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:31:56,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:31:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:33:12,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-04-01 18:33:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:33:12,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 18:33:12,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:33:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:33:12,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:33:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-04-01 18:33:14,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096550652] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:33:14,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:33:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2023-04-01 18:33:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738612057] [2023-04-01 18:33:14,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:33:14,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-01 18:33:14,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:33:14,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-01 18:33:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2023-04-01 18:33:14,919 INFO L87 Difference]: Start difference. First operand 250 states and 298 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:33:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:33:19,846 INFO L93 Difference]: Finished difference Result 641 states and 880 transitions. [2023-04-01 18:33:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 18:33:19,847 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 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 245 [2023-04-01 18:33:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:33:19,851 INFO L225 Difference]: With dead ends: 641 [2023-04-01 18:33:19,851 INFO L226 Difference]: Without dead ends: 490 [2023-04-01 18:33:19,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2023-04-01 18:33:19,862 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1518 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:33:19,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 42 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 18:33:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-04-01 18:33:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2023-04-01 18:33:19,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 484 states have (on average 1.2004132231404958) internal successors, (581), 484 states have internal predecessors, (581), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:33:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 586 transitions. [2023-04-01 18:33:19,881 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 586 transitions. Word has length 245 [2023-04-01 18:33:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:33:19,882 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 586 transitions. [2023-04-01 18:33:19,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:33:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 586 transitions. [2023-04-01 18:33:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2023-04-01 18:33:19,889 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:33:19,889 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:33:19,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:33:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:33:20,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:33:20,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:33:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash 486359614, now seen corresponding path program 6 times [2023-04-01 18:33:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:33:20,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626294068] [2023-04-01 18:33:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:33:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:33:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:33:27,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:33:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:33:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22043 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2023-04-01 18:33:27,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:33:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626294068] [2023-04-01 18:33:27,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626294068] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:33:27,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155277825] [2023-04-01 18:33:27,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:33:27,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:33:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:33:27,429 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:33:27,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process