/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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:13:00,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:13:00,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:13:00,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:13:00,194 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 18:13:00,212 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:13:00,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:13:00,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:13:00,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:13:00,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:13:00,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:13:00,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:13:00,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:13:00,213 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:13:00,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:13:00,213 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:13:00,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:13:00,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:13:00,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:13:00,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:13:00,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:13:00,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:13:00,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:13:00,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:13:00,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:13:00,218 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:13:00,218 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:13:00,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:13:00,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:13:00,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:13:00,408 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:13:00,409 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:13:00,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-04-01 18:13:01,396 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:13:01,539 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:13:01,539 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_bubblesort_ground-2.i [2023-04-01 18:13:01,543 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd2222a/920d0a9c0283483aaf417e6000b37860/FLAG03ada007a [2023-04-01 18:13:01,556 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78bd2222a/920d0a9c0283483aaf417e6000b37860 [2023-04-01 18:13:01,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:13:01,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:13:01,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:13:01,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:13:01,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:13:01,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f16652 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01, skipping insertion in model container [2023-04-01 18:13:01,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:13:01,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:13:01,690 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/sorting_bubblesort_ground-2.i[820,833] [2023-04-01 18:13:01,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:13:01,713 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:13:01,724 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/sorting_bubblesort_ground-2.i[820,833] [2023-04-01 18:13:01,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:13:01,749 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:13:01,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01 WrapperNode [2023-04-01 18:13:01,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:13:01,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:13:01,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:13:01,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:13:01,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:13:01,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:13:01,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:13:01,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:13:01,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (1/1) ... [2023-04-01 18:13:01,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:13:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:01,847 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 18:13:01,865 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 18:13:01,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:13:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:13:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:13:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:13:01,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:13:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:13:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:13:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:13:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:13:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:13:01,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:13:01,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:13:01,950 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:13:01,951 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:13:02,129 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:13:02,133 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:13:02,133 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 18:13:02,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:13:02 BoogieIcfgContainer [2023-04-01 18:13:02,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:13:02,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:13:02,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:13:02,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:13:02,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:13:01" (1/3) ... [2023-04-01 18:13:02,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9d6971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:13:02, skipping insertion in model container [2023-04-01 18:13:02,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:13:01" (2/3) ... [2023-04-01 18:13:02,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9d6971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:13:02, skipping insertion in model container [2023-04-01 18:13:02,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:13:02" (3/3) ... [2023-04-01 18:13:02,140 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2023-04-01 18:13:02,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:13:02,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:13:02,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:13:02,219 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;@584e0236, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:13:02,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:13:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 18:13:02,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:13:02,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:02,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:02,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:02,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash 498599300, now seen corresponding path program 1 times [2023-04-01 18:13:02,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:02,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508560045] [2023-04-01 18:13:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:02,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,435 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 18:13:02,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508560045] [2023-04-01 18:13:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508560045] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:02,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:13:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119090251] [2023-04-01 18:13:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:02,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:13:02,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:13:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:13:02,466 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:02,557 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2023-04-01 18:13:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:13:02,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:13:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:02,566 INFO L225 Difference]: With dead ends: 54 [2023-04-01 18:13:02,567 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 18:13:02,569 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 18:13:02,571 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:02,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:02,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 18:13:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 18:13:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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 18:13:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-04-01 18:13:02,600 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2023-04-01 18:13:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:02,600 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-04-01 18:13:02,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-04-01 18:13:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:13:02,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:02,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:13:02,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:02,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash 247748289, now seen corresponding path program 1 times [2023-04-01 18:13:02,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:02,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641401369] [2023-04-01 18:13:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,661 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 18:13:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:02,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641401369] [2023-04-01 18:13:02,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641401369] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:02,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:13:02,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:13:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131948498] [2023-04-01 18:13:02,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:02,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:13:02,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:13:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:13:02,664 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:02,714 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2023-04-01 18:13:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:13:02,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:13:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:02,715 INFO L225 Difference]: With dead ends: 46 [2023-04-01 18:13:02,715 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 18:13:02,715 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 18:13:02,716 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:02,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 12 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:13:02,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 18:13:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-04-01 18:13:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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 18:13:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-04-01 18:13:02,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2023-04-01 18:13:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:02,723 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-04-01 18:13:02,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-04-01 18:13:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 18:13:02,724 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:02,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:02,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:13:02,724 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:02,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:02,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1572069859, now seen corresponding path program 1 times [2023-04-01 18:13:02,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:02,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63889719] [2023-04-01 18:13:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:02,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:13:02,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63889719] [2023-04-01 18:13:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63889719] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:02,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510941162] [2023-04-01 18:13:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:02,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:02,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:02,829 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 18:13:02,831 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 18:13:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:02,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:13:02,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:02,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:13:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510941162] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:02,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:13:02,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 18:13:02,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383792009] [2023-04-01 18:13:02,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:02,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:13:02,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:02,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:13:02,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:13:02,988 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:03,005 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-04-01 18:13:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:13:03,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 18:13:03,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:03,010 INFO L225 Difference]: With dead ends: 44 [2023-04-01 18:13:03,010 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:13:03,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:13:03,013 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:03,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:13:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:13:03,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-04-01 18:13:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 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 18:13:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-01 18:13:03,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2023-04-01 18:13:03,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:03,020 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-01 18:13:03,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-01 18:13:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 18:13:03,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:03,021 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 18:13:03,035 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 18:13:03,232 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 18:13:03,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:03,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1883512810, now seen corresponding path program 1 times [2023-04-01 18:13:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:03,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918723877] [2023-04-01 18:13:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,338 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 18:13:03,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:03,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918723877] [2023-04-01 18:13:03,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918723877] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:03,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586951851] [2023-04-01 18:13:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:03,349 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 18:13:03,358 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 18:13:03,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:13:03,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:13:03,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:13:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586951851] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:13:03,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:13:03,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 18:13:03,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867530232] [2023-04-01 18:13:03,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:13:03,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:13:03,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:03,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:13:03,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:13:03,410 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:03,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:03,423 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2023-04-01 18:13:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:13:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 18:13:03,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:03,424 INFO L225 Difference]: With dead ends: 56 [2023-04-01 18:13:03,424 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 18:13:03,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:13:03,425 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:03,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:13:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 18:13:03,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-04-01 18:13:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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 18:13:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-04-01 18:13:03,430 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2023-04-01 18:13:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:03,431 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-04-01 18:13:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:13:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-04-01 18:13:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 18:13:03,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:03,437 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] [2023-04-01 18:13:03,447 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 18:13:03,642 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 18:13:03,642 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:03,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:03,649 INFO L85 PathProgramCache]: Analyzing trace with hash -45337753, now seen corresponding path program 1 times [2023-04-01 18:13:03,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:03,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611780056] [2023-04-01 18:13:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:03,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611780056] [2023-04-01 18:13:03,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611780056] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084824370] [2023-04-01 18:13:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:03,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:03,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:03,749 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 18:13:03,780 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 18:13:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:03,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:13:03,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:03,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:03,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084824370] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:03,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:13:03,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969432751] [2023-04-01 18:13:03,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:03,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:13:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:13:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:13:03,880 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 18:13:03,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:03,974 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-04-01 18:13:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:13:03,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 23 [2023-04-01 18:13:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:03,976 INFO L225 Difference]: With dead ends: 61 [2023-04-01 18:13:03,976 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 18:13:03,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:13:03,978 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:03,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 12 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:13:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 18:13:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-04-01 18:13:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 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 18:13:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-04-01 18:13:03,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 23 [2023-04-01 18:13:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:03,991 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-04-01 18:13:03,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 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 18:13:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-04-01 18:13:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:13:03,992 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:03,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:04,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 18:13:04,197 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 18:13:04,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:04,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:04,198 INFO L85 PathProgramCache]: Analyzing trace with hash 317957313, now seen corresponding path program 2 times [2023-04-01 18:13:04,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:04,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583746685] [2023-04-01 18:13:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:04,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:13:04,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:04,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583746685] [2023-04-01 18:13:04,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583746685] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:04,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691420125] [2023-04-01 18:13:04,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:13:04,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:04,292 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 18:13:04,293 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 18:13:04,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:13:04,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:04,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:13:04,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:04,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:13:04,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691420125] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:04,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:04,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 18:13:04,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405543951] [2023-04-01 18:13:04,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:04,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 18:13:04,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 18:13:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 18:13:04,478 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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 18:13:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:04,670 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2023-04-01 18:13:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 18:13:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-01 18:13:04,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:04,671 INFO L225 Difference]: With dead ends: 82 [2023-04-01 18:13:04,671 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 18:13:04,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-04-01 18:13:04,672 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:04,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 18:13:04,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-04-01 18:13:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 18:13:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2023-04-01 18:13:04,678 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 29 [2023-04-01 18:13:04,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:04,678 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2023-04-01 18:13:04,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 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 18:13:04,678 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2023-04-01 18:13:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-01 18:13:04,679 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:04,679 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:04,697 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 18:13:04,884 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 18:13:04,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:04,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1061801596, now seen corresponding path program 3 times [2023-04-01 18:13:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669164550] [2023-04-01 18:13:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 18:13:05,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:05,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669164550] [2023-04-01 18:13:05,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669164550] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:05,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415379567] [2023-04-01 18:13:05,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:13:05,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:05,021 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 18:13:05,023 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 18:13:05,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 18:13:05,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:05,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 18:13:05,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 18:13:05,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-04-01 18:13:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415379567] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:05,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:05,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-04-01 18:13:05,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501162351] [2023-04-01 18:13:05,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 18:13:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 18:13:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-04-01 18:13:05,132 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 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 18:13:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:05,242 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2023-04-01 18:13:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 18:13:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 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 44 [2023-04-01 18:13:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:05,244 INFO L225 Difference]: With dead ends: 106 [2023-04-01 18:13:05,244 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 18:13:05,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-04-01 18:13:05,245 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:05,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 22 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 18:13:05,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-01 18:13:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 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 18:13:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2023-04-01 18:13:05,264 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 44 [2023-04-01 18:13:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:05,265 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2023-04-01 18:13:05,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 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 18:13:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2023-04-01 18:13:05,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 18:13:05,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:05,269 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:05,275 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 18:13:05,469 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 18:13:05,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:05,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:05,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1776075068, now seen corresponding path program 4 times [2023-04-01 18:13:05,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:05,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745501863] [2023-04-01 18:13:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:05,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 18:13:05,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:05,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745501863] [2023-04-01 18:13:05,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745501863] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:05,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63582549] [2023-04-01 18:13:05,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:13:05,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:05,715 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 18:13:05,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:13:05,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:13:05,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:05,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:13:05,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 18:13:05,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 18:13:06,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63582549] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:06,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:06,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:13:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218478398] [2023-04-01 18:13:06,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:13:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:13:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:13:06,086 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 18:13:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:06,491 INFO L93 Difference]: Finished difference Result 155 states and 198 transitions. [2023-04-01 18:13:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:13:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 56 [2023-04-01 18:13:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:06,493 INFO L225 Difference]: With dead ends: 155 [2023-04-01 18:13:06,493 INFO L226 Difference]: Without dead ends: 103 [2023-04-01 18:13:06,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:13:06,494 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:06,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 27 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-04-01 18:13:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-04-01 18:13:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.175257731958763) internal successors, (114), 97 states have internal predecessors, (114), 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 18:13:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2023-04-01 18:13:06,501 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 56 [2023-04-01 18:13:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:06,501 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2023-04-01 18:13:06,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 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 18:13:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2023-04-01 18:13:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 18:13:06,502 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:06,502 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:06,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:06,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:06,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:06,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1286319572, now seen corresponding path program 5 times [2023-04-01 18:13:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:06,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174495433] [2023-04-01 18:13:06,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:06,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:07,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-04-01 18:13:07,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:07,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174495433] [2023-04-01 18:13:07,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174495433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:07,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363178117] [2023-04-01 18:13:07,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:13:07,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:07,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:07,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:13:07,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:13:07,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-04-01 18:13:07,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:07,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 18:13:07,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:13:07,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:13:07,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363178117] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:07,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:07,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-04-01 18:13:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922913701] [2023-04-01 18:13:07,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:07,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 18:13:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:07,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 18:13:07,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:13:07,738 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 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 18:13:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:08,488 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2023-04-01 18:13:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 18:13:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 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 80 [2023-04-01 18:13:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:08,489 INFO L225 Difference]: With dead ends: 206 [2023-04-01 18:13:08,489 INFO L226 Difference]: Without dead ends: 154 [2023-04-01 18:13:08,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 18:13:08,492 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:08,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 47 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:13:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-04-01 18:13:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2023-04-01 18:13:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.2244897959183674) internal successors, (180), 147 states have internal predecessors, (180), 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 18:13:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 185 transitions. [2023-04-01 18:13:08,498 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 185 transitions. Word has length 80 [2023-04-01 18:13:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:08,499 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 185 transitions. [2023-04-01 18:13:08,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.675) internal successors, (107), 39 states have internal predecessors, (107), 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 18:13:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 185 transitions. [2023-04-01 18:13:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 18:13:08,500 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:08,500 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:08,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:08,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:08,722 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:08,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 718774390, now seen corresponding path program 6 times [2023-04-01 18:13:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:08,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237908584] [2023-04-01 18:13:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:08,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:09,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:09,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237908584] [2023-04-01 18:13:09,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237908584] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843963826] [2023-04-01 18:13:09,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:13:09,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:09,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:09,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:13:09,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:13:10,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-04-01 18:13:10,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:10,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:13:10,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:10,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:10,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843963826] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:10,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:10,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2023-04-01 18:13:10,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491724840] [2023-04-01 18:13:10,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:10,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:13:10,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:13:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:13:10,833 INFO L87 Difference]: Start difference. First operand 153 states and 185 transitions. Second operand has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 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 18:13:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:11,873 INFO L93 Difference]: Finished difference Result 303 states and 391 transitions. [2023-04-01 18:13:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 18:13:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 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 106 [2023-04-01 18:13:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:11,874 INFO L225 Difference]: With dead ends: 303 [2023-04-01 18:13:11,874 INFO L226 Difference]: Without dead ends: 203 [2023-04-01 18:13:11,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 18:13:11,877 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:11,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 32 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:13:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-04-01 18:13:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-04-01 18:13:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 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 18:13:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 235 transitions. [2023-04-01 18:13:11,884 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 235 transitions. Word has length 106 [2023-04-01 18:13:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:11,884 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 235 transitions. [2023-04-01 18:13:11,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 51 states have internal predecessors, (115), 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 18:13:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 235 transitions. [2023-04-01 18:13:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-04-01 18:13:11,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:11,885 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:11,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:12,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 18:13:12,092 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:12,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:12,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1111486024, now seen corresponding path program 7 times [2023-04-01 18:13:12,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814084025] [2023-04-01 18:13:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:13,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814084025] [2023-04-01 18:13:13,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814084025] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953543717] [2023-04-01 18:13:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 18:13:13,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:13,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:13,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:13:13,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:13:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:13,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:13:13,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:14,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:16,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953543717] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:16,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:16,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:13:16,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044895269] [2023-04-01 18:13:16,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:16,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:13:16,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:13:16,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:13:16,410 INFO L87 Difference]: Start difference. First operand 203 states and 235 transitions. Second operand has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 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 18:13:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:19,810 INFO L93 Difference]: Finished difference Result 403 states and 516 transitions. [2023-04-01 18:13:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:13:19,810 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 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 156 [2023-04-01 18:13:19,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:19,811 INFO L225 Difference]: With dead ends: 403 [2023-04-01 18:13:19,811 INFO L226 Difference]: Without dead ends: 303 [2023-04-01 18:13:19,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:13:19,818 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 222 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:19,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 27 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:13:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-04-01 18:13:19,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2023-04-01 18:13:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 297 states have (on average 1.1111111111111112) internal successors, (330), 297 states have internal predecessors, (330), 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 18:13:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 335 transitions. [2023-04-01 18:13:19,826 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 335 transitions. Word has length 156 [2023-04-01 18:13:19,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:19,826 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 335 transitions. [2023-04-01 18:13:19,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.107843137254902) internal successors, (215), 101 states have internal predecessors, (215), 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 18:13:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 335 transitions. [2023-04-01 18:13:19,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-04-01 18:13:19,828 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:19,828 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:19,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 18:13:20,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:20,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:20,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:20,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1541726100, now seen corresponding path program 8 times [2023-04-01 18:13:20,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:20,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735788513] [2023-04-01 18:13:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:20,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:24,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9892 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:24,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735788513] [2023-04-01 18:13:24,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735788513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:24,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587523427] [2023-04-01 18:13:24,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:13:24,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:24,906 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:13:24,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:13:25,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:13:25,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:25,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 100 conjunts are in the unsatisfiable core [2023-04-01 18:13:25,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9892 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:25,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:13:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9892 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:32,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587523427] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:13:32,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:13:32,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2023-04-01 18:13:32,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710766414] [2023-04-01 18:13:32,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:13:32,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2023-04-01 18:13:32,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:13:32,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2023-04-01 18:13:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2023-04-01 18:13:32,088 INFO L87 Difference]: Start difference. First operand 303 states and 335 transitions. Second operand has 202 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 201 states have internal predecessors, (415), 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 18:13:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:13:41,672 INFO L93 Difference]: Finished difference Result 603 states and 766 transitions. [2023-04-01 18:13:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2023-04-01 18:13:41,673 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 201 states have internal predecessors, (415), 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 256 [2023-04-01 18:13:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:13:41,676 INFO L225 Difference]: With dead ends: 603 [2023-04-01 18:13:41,676 INFO L226 Difference]: Without dead ends: 503 [2023-04-01 18:13:41,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24942 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=59901, Invalid=99699, Unknown=0, NotChecked=0, Total=159600 [2023-04-01 18:13:41,682 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 422 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:13:41,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 67 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:13:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-04-01 18:13:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 503. [2023-04-01 18:13:41,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 497 states have (on average 1.0663983903420524) internal successors, (530), 497 states have internal predecessors, (530), 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 18:13:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 535 transitions. [2023-04-01 18:13:41,714 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 535 transitions. Word has length 256 [2023-04-01 18:13:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:13:41,715 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 535 transitions. [2023-04-01 18:13:41,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 201 states have internal predecessors, (415), 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 18:13:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 535 transitions. [2023-04-01 18:13:41,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-04-01 18:13:41,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:13:41,720 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:13:41,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:13:41,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 18:13:41,926 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:13:41,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:13:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1536467276, now seen corresponding path program 9 times [2023-04-01 18:13:41,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:13:41,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134089] [2023-04-01 18:13:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:13:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:13:42,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:57,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:13:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:13:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 39492 backedges. 0 proven. 39204 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-04-01 18:13:57,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:13:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134089] [2023-04-01 18:13:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134089] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:13:57,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365269193] [2023-04-01 18:13:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:13:57,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:13:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:13:57,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:13:57,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:13:58,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-04-01 18:13:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:13:58,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 18:13:58,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:13:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 39492 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 39204 trivial. 0 not checked. [2023-04-01 18:13:59,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:14:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 39492 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 39204 trivial. 0 not checked. [2023-04-01 18:14:00,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365269193] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:14:00,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:14:00,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 17, 17] total 232 [2023-04-01 18:14:00,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381189765] [2023-04-01 18:14:00,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:14:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 232 states [2023-04-01 18:14:00,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:14:00,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 232 interpolants. [2023-04-01 18:14:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20597, Invalid=32995, Unknown=0, NotChecked=0, Total=53592 [2023-04-01 18:14:00,309 INFO L87 Difference]: Start difference. First operand 503 states and 535 transitions. Second operand has 232 states, 232 states have (on average 2.185344827586207) internal successors, (507), 231 states have internal predecessors, (507), 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 18:14:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:14:17,144 INFO L93 Difference]: Finished difference Result 702 states and 830 transitions. [2023-04-01 18:14:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2023-04-01 18:14:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 232 states, 232 states have (on average 2.185344827586207) internal successors, (507), 231 states have internal predecessors, (507), 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 456 [2023-04-01 18:14:17,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:14:17,147 INFO L225 Difference]: With dead ends: 702 [2023-04-01 18:14:17,147 INFO L226 Difference]: Without dead ends: 602 [2023-04-01 18:14:17,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1343 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35121 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=61785, Invalid=150275, Unknown=0, NotChecked=0, Total=212060 [2023-04-01 18:14:17,161 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 626 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:14:17,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 72 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:14:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-04-01 18:14:17,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 601. [2023-04-01 18:14:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 595 states have (on average 1.1092436974789917) internal successors, (660), 595 states have internal predecessors, (660), 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 18:14:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 665 transitions. [2023-04-01 18:14:17,189 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 665 transitions. Word has length 456 [2023-04-01 18:14:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:14:17,189 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 665 transitions. [2023-04-01 18:14:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 232 states, 232 states have (on average 2.185344827586207) internal successors, (507), 231 states have internal predecessors, (507), 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 18:14:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 665 transitions. [2023-04-01 18:14:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-04-01 18:14:17,194 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:14:17,195 INFO L195 NwaCegarLoop]: trace histogram [199, 199, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:14:17,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 18:14:17,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 18:14:17,401 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:14:17,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:14:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash 67365590, now seen corresponding path program 10 times [2023-04-01 18:14:17,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:14:17,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466246102] [2023-04-01 18:14:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:14:17,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:14:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:37,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:14:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:14:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40937 backedges. 0 proven. 39601 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-04-01 18:14:37,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:14:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466246102] [2023-04-01 18:14:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466246102] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:14:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804147178] [2023-04-01 18:14:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:14:37,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:14:37,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:14:37,705 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:14:37,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 18:14:38,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:14:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:14:38,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 201 conjunts are in the unsatisfiable core [2023-04-01 18:14:38,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:14:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40937 backedges. 0 proven. 39601 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-04-01 18:14:38,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:15:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 40937 backedges. 0 proven. 39601 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-04-01 18:15:04,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804147178] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:15:04,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:15:04,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 202, 202] total 404 [2023-04-01 18:15:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691800064] [2023-04-01 18:15:04,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:15:04,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 404 states [2023-04-01 18:15:04,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:15:04,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 404 interpolants. [2023-04-01 18:15:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81005, Invalid=81807, Unknown=0, NotChecked=0, Total=162812 [2023-04-01 18:15:04,055 INFO L87 Difference]: Start difference. First operand 601 states and 665 transitions. Second operand has 404 states, 404 states have (on average 2.027227722772277) internal successors, (819), 403 states have internal predecessors, (819), 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 18:15:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:15:41,987 INFO L93 Difference]: Finished difference Result 1199 states and 1527 transitions. [2023-04-01 18:15:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 403 states. [2023-04-01 18:15:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 404 states, 404 states have (on average 2.027227722772277) internal successors, (819), 403 states have internal predecessors, (819), 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 506 [2023-04-01 18:15:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:15:41,991 INFO L225 Difference]: With dead ends: 1199 [2023-04-01 18:15:41,991 INFO L226 Difference]: Without dead ends: 1003 [2023-04-01 18:15:42,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1615 GetRequests, 813 SyntacticMatches, 0 SemanticMatches, 802 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100894 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=242206, Invalid=403406, Unknown=0, NotChecked=0, Total=645612 [2023-04-01 18:15:42,017 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 826 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:15:42,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 42 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 18:15:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2023-04-01 18:15:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2023-04-01 18:15:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 997 states have (on average 1.065195586760281) internal successors, (1062), 997 states have internal predecessors, (1062), 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 18:15:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1067 transitions. [2023-04-01 18:15:42,042 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1067 transitions. Word has length 506 [2023-04-01 18:15:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:15:42,043 INFO L495 AbstractCegarLoop]: Abstraction has 1003 states and 1067 transitions. [2023-04-01 18:15:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 404 states, 404 states have (on average 2.027227722772277) internal successors, (819), 403 states have internal predecessors, (819), 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 18:15:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1067 transitions. [2023-04-01 18:15:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 909 [2023-04-01 18:15:42,049 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:15:42,049 INFO L195 NwaCegarLoop]: trace histogram [400, 400, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:15:42,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 18:15:42,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 18:15:42,256 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:15:42,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:15:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash -158746616, now seen corresponding path program 11 times [2023-04-01 18:15:42,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:15:42,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501994705] [2023-04-01 18:15:42,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:15:42,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:15:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:17:00,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:17:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:17:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 161336 backedges. 0 proven. 160000 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-04-01 18:17:00,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:17:00,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501994705] [2023-04-01 18:17:00,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501994705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:17:00,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080943129] [2023-04-01 18:17:00,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:17:00,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:17:00,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:17:00,607 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 18:17:00,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process