/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/loops-crafted-1/vnew1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:41:57,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:41:57,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:41:57,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:41:57,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:41:57,740 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:41:57,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:41:57,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:41:57,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:41:57,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:41:57,741 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:41:57,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:41:57,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:41:57,742 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:41:57,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:41:57,742 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:41:57,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:41:57,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:41:57,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:41:57,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:41:57,745 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:41:57,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:41:57,745 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:41:57,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:41:57,745 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:41:57,745 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:41:57,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:41:57,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:41:57,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:41:57,953 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:41:57,953 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:41:57,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/vnew1.c [2023-04-02 01:41:58,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:41:59,166 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:41:59,167 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/vnew1.c [2023-04-02 01:41:59,171 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc89ada2/bddc306bdfa543fbbb896cb98ea46152/FLAG4adaa780f [2023-04-02 01:41:59,186 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc89ada2/bddc306bdfa543fbbb896cb98ea46152 [2023-04-02 01:41:59,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:41:59,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:41:59,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:41:59,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:41:59,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:41:59,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da5940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59, skipping insertion in model container [2023-04-02 01:41:59,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:41:59,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:41:59,329 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2023-04-02 01:41:59,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:41:59,345 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:41:59,354 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2023-04-02 01:41:59,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:41:59,368 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:41:59,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59 WrapperNode [2023-04-02 01:41:59,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:41:59,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:41:59,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:41:59,371 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:41:59,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,392 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:41:59,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:41:59,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:41:59,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:41:59,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (1/1) ... [2023-04-02 01:41:59,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:41:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:59,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 01:41:59,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 01:41:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:41:59,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:41:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:41:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:41:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:41:59,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:41:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:41:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:41:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:41:59,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:41:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:41:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:41:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-02 01:41:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:41:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:41:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:41:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:41:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:41:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:41:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:41:59,529 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:41:59,532 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:41:59,684 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:41:59,688 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:41:59,688 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 01:41:59,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:41:59 BoogieIcfgContainer [2023-04-02 01:41:59,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:41:59,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:41:59,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:41:59,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:41:59,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:41:59" (1/3) ... [2023-04-02 01:41:59,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6336d1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:41:59, skipping insertion in model container [2023-04-02 01:41:59,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:59" (2/3) ... [2023-04-02 01:41:59,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6336d1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:41:59, skipping insertion in model container [2023-04-02 01:41:59,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:41:59" (3/3) ... [2023-04-02 01:41:59,694 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2023-04-02 01:41:59,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:41:59,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:41:59,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:41:59,744 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;@34eb4b52, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:41:59,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:41:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:41:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 01:41:59,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:59,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:59,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:59,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:59,773 INFO L85 PathProgramCache]: Analyzing trace with hash 486508050, now seen corresponding path program 1 times [2023-04-02 01:41:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:59,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307496774] [2023-04-02 01:41:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:59,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:00,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307496774] [2023-04-02 01:42:00,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307496774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:42:00,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:42:00,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 01:42:00,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409554726] [2023-04-02 01:42:00,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:42:00,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 01:42:00,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:00,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 01:42:00,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:42:00,190 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:42:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:00,319 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2023-04-02 01:42:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:42:00,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-02 01:42:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:00,326 INFO L225 Difference]: With dead ends: 44 [2023-04-02 01:42:00,326 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 01:42:00,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-04-02 01:42:00,330 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:00,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:42:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 01:42:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-02 01:42:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-04-02 01:42:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 01:42:00,358 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2023-04-02 01:42:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:00,359 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 01:42:00,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:42:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 01:42:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:42:00,360 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:00,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:00,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:42:00,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:00,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 77944193, now seen corresponding path program 1 times [2023-04-02 01:42:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:00,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980201858] [2023-04-02 01:42:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:00,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:00,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:00,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980201858] [2023-04-02 01:42:00,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980201858] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:00,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170806154] [2023-04-02 01:42:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:00,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:00,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:00,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:00,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:42:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:00,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:42:00,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:01,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170806154] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:01,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:01,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2023-04-02 01:42:01,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981488774] [2023-04-02 01:42:01,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:01,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 01:42:01,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 01:42:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:42:01,198 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:42:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:01,825 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-04-02 01:42:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:42:01,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:42:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:01,827 INFO L225 Difference]: With dead ends: 46 [2023-04-02 01:42:01,828 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 01:42:01,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:42:01,829 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:01,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 01:42:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 01:42:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2023-04-02 01:42:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 01:42:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-04-02 01:42:01,841 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 15 [2023-04-02 01:42:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:01,842 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-04-02 01:42:01,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:42:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-04-02 01:42:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-02 01:42:01,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:01,843 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:01,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 01:42:02,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:02,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:02,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1079023150, now seen corresponding path program 2 times [2023-04-02 01:42:02,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:02,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175002618] [2023-04-02 01:42:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:02,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:02,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:02,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175002618] [2023-04-02 01:42:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175002618] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:02,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408998094] [2023-04-02 01:42:02,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:02,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:02,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:02,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:02,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:42:02,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:02,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2023-04-02 01:42:02,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:02,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:03,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408998094] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:03,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:03,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2023-04-02 01:42:03,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47270812] [2023-04-02 01:42:03,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:03,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 01:42:03,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:03,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 01:42:03,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:42:03,021 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:42:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:05,354 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-04-02 01:42:05,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-02 01:42:05,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-04-02 01:42:05,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:05,356 INFO L225 Difference]: With dead ends: 74 [2023-04-02 01:42:05,356 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 01:42:05,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2023-04-02 01:42:05,357 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 153 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:05,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 68 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:42:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 01:42:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2023-04-02 01:42:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 37 states have internal predecessors, (39), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:42:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-04-02 01:42:05,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 18 [2023-04-02 01:42:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:05,393 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-04-02 01:42:05,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 23 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 01:42:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-04-02 01:42:05,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 01:42:05,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:05,395 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:05,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:05,601 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,SelfDestructingSolverStorable2 [2023-04-02 01:42:05,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:05,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:05,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1862379119, now seen corresponding path program 1 times [2023-04-02 01:42:05,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:05,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768607564] [2023-04-02 01:42:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:05,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-02 01:42:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:05,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:05,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768607564] [2023-04-02 01:42:05,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768607564] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:05,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258104927] [2023-04-02 01:42:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:05,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:05,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:06,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:42:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:06,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 01:42:06,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:06,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:42:06,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258104927] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:06,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:06,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2023-04-02 01:42:06,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408977843] [2023-04-02 01:42:06,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:06,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 01:42:06,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 01:42:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-04-02 01:42:06,470 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 8 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 01:42:08,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:08,520 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2023-04-02 01:42:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 01:42:08,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 8 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2023-04-02 01:42:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:08,522 INFO L225 Difference]: With dead ends: 103 [2023-04-02 01:42:08,522 INFO L226 Difference]: Without dead ends: 101 [2023-04-02 01:42:08,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=428, Invalid=1828, Unknown=0, NotChecked=0, Total=2256 [2023-04-02 01:42:08,523 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 161 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:08,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 58 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 01:42:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-04-02 01:42:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2023-04-02 01:42:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 69 states have internal predecessors, (73), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 10 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 01:42:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-04-02 01:42:08,555 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 24 [2023-04-02 01:42:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:08,555 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-04-02 01:42:08,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 23 states have internal predecessors, (41), 8 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-02 01:42:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-04-02 01:42:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 01:42:08,557 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:08,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:08,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:42:08,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:08,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:08,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:08,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1833107583, now seen corresponding path program 2 times [2023-04-02 01:42:08,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:08,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91543768] [2023-04-02 01:42:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-04-02 01:42:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:08,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-04-02 01:42:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91543768] [2023-04-02 01:42:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91543768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961176672] [2023-04-02 01:42:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:42:09,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:09,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:09,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:09,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:42:09,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:42:09,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:09,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:42:09,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:09,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:15,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961176672] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:15,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:15,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2023-04-02 01:42:15,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563503071] [2023-04-02 01:42:15,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:15,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-02 01:42:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-02 01:42:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=300, Unknown=3, NotChecked=0, Total=380 [2023-04-02 01:42:15,571 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:42:30,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-04-02 01:42:31,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-04-02 01:42:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:42:45,128 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2023-04-02 01:42:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 01:42:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 29 [2023-04-02 01:42:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:42:45,130 INFO L225 Difference]: With dead ends: 109 [2023-04-02 01:42:45,130 INFO L226 Difference]: Without dead ends: 78 [2023-04-02 01:42:45,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=203, Invalid=719, Unknown=8, NotChecked=0, Total=930 [2023-04-02 01:42:45,131 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:42:45,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 52 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-02 01:42:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-02 01:42:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-02 01:42:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 61 states have internal predecessors, (64), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 01:42:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2023-04-02 01:42:45,158 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 29 [2023-04-02 01:42:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:42:45,158 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2023-04-02 01:42:45,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-02 01:42:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2023-04-02 01:42:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 01:42:45,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:42:45,159 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:42:45,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 01:42:45,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:45,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:42:45,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:42:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash -653678111, now seen corresponding path program 3 times [2023-04-02 01:42:45,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:42:45,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221459181] [2023-04-02 01:42:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:42:45,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:42:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:42:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-02 01:42:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-02 01:42:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:42:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:45,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:42:45,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221459181] [2023-04-02 01:42:45,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221459181] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:42:45,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746856517] [2023-04-02 01:42:45,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:42:45,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:42:45,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:42:45,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:42:45,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:42:46,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-02 01:42:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:42:46,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-02 01:42:46,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:42:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:46,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:42:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:42:47,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746856517] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:42:47,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:42:47,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 39 [2023-04-02 01:42:47,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932598253] [2023-04-02 01:42:47,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:42:47,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-02 01:42:47,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:42:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-02 01:42:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2023-04-02 01:42:47,581 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 36 states have internal predecessors, (59), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-02 01:43:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:02,159 INFO L93 Difference]: Finished difference Result 175 states and 219 transitions. [2023-04-02 01:43:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-02 01:43:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 36 states have internal predecessors, (59), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2023-04-02 01:43:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:02,161 INFO L225 Difference]: With dead ends: 175 [2023-04-02 01:43:02,161 INFO L226 Difference]: Without dead ends: 173 [2023-04-02 01:43:02,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=823, Invalid=3733, Unknown=0, NotChecked=0, Total=4556 [2023-04-02 01:43:02,163 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 496 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:02,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 82 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-02 01:43:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-02 01:43:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 143. [2023-04-02 01:43:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 114 states have internal predecessors, (123), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (28), 18 states have call predecessors, (28), 28 states have call successors, (28) [2023-04-02 01:43:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 180 transitions. [2023-04-02 01:43:02,228 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 180 transitions. Word has length 35 [2023-04-02 01:43:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:02,230 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 180 transitions. [2023-04-02 01:43:02,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 36 states have internal predecessors, (59), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-02 01:43:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 180 transitions. [2023-04-02 01:43:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 01:43:02,238 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:02,238 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:02,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:02,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:02,444 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:02,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash -452819039, now seen corresponding path program 4 times [2023-04-02 01:43:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:02,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668527479] [2023-04-02 01:43:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:02,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-02 01:43:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-02 01:43:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-02 01:43:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-02 01:43:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 01:43:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668527479] [2023-04-02 01:43:03,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668527479] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056898603] [2023-04-02 01:43:03,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:43:03,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:03,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:03,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:03,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:43:03,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:43:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:03,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-02 01:43:03,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 01:43:03,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 01:43:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056898603] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:06,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:06,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 13] total 35 [2023-04-02 01:43:06,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80926298] [2023-04-02 01:43:06,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:06,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-02 01:43:06,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:06,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-02 01:43:06,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2023-04-02 01:43:06,517 INFO L87 Difference]: Start difference. First operand 143 states and 180 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-02 01:43:08,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:08,618 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2023-04-02 01:43:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-02 01:43:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 45 [2023-04-02 01:43:08,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:08,622 INFO L225 Difference]: With dead ends: 176 [2023-04-02 01:43:08,622 INFO L226 Difference]: Without dead ends: 133 [2023-04-02 01:43:08,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=513, Invalid=2457, Unknown=0, NotChecked=0, Total=2970 [2023-04-02 01:43:08,624 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:08,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 67 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 01:43:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-04-02 01:43:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-04-02 01:43:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 97 states have (on average 1.175257731958763) internal successors, (114), 106 states have internal predecessors, (114), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (26), 17 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-02 01:43:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2023-04-02 01:43:08,731 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 45 [2023-04-02 01:43:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:08,731 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2023-04-02 01:43:08,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-02 01:43:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2023-04-02 01:43:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 01:43:08,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:08,733 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:08,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:08,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:08,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1854070209, now seen corresponding path program 5 times [2023-04-02 01:43:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:08,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581846231] [2023-04-02 01:43:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:09,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:43:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:09,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-02 01:43:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-02 01:43:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:09,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-04-02 01:43:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:09,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-02 01:43:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:43:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 01:43:09,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:43:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581846231] [2023-04-02 01:43:09,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581846231] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:43:09,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811780688] [2023-04-02 01:43:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:43:09,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:09,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:43:09,674 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:43:09,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:43:09,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-04-02 01:43:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:43:09,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-02 01:43:09,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:43:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 01:43:12,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:43:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 01:43:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811780688] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:43:14,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:43:14,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 18] total 51 [2023-04-02 01:43:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571533416] [2023-04-02 01:43:14,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:43:14,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 01:43:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:43:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 01:43:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2131, Unknown=0, NotChecked=0, Total=2550 [2023-04-02 01:43:14,311 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 51 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 49 states have internal predecessors, (68), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-02 01:43:26,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-02 01:43:42,389 WARN L223 SmtUtils]: Spent 9.33s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:43:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:43:48,883 INFO L93 Difference]: Finished difference Result 201 states and 250 transitions. [2023-04-02 01:43:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-04-02 01:43:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 49 states have internal predecessors, (68), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 47 [2023-04-02 01:43:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:43:48,885 INFO L225 Difference]: With dead ends: 201 [2023-04-02 01:43:48,885 INFO L226 Difference]: Without dead ends: 199 [2023-04-02 01:43:48,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=1844, Invalid=9286, Unknown=0, NotChecked=0, Total=11130 [2023-04-02 01:43:48,887 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 279 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:43:48,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 122 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-04-02 01:43:48,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-04-02 01:43:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2023-04-02 01:43:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 142 states have (on average 1.119718309859155) internal successors, (159), 153 states have internal predecessors, (159), 45 states have call successors, (45), 12 states have call predecessors, (45), 11 states have return successors, (44), 33 states have call predecessors, (44), 44 states have call successors, (44) [2023-04-02 01:43:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 248 transitions. [2023-04-02 01:43:48,961 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 248 transitions. Word has length 47 [2023-04-02 01:43:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:43:48,961 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 248 transitions. [2023-04-02 01:43:48,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 49 states have internal predecessors, (68), 17 states have call successors, (19), 5 states have call predecessors, (19), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2023-04-02 01:43:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 248 transitions. [2023-04-02 01:43:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 01:43:48,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:43:48,962 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:43:48,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 01:43:49,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:43:49,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:43:49,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:43:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash 43978513, now seen corresponding path program 6 times [2023-04-02 01:43:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:43:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261745885] [2023-04-02 01:43:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:43:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:43:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:44:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:58,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-02 01:44:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:58,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-02 01:44:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:58,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-02 01:44:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:44:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 80 refuted. 1 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 01:44:58,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:44:58,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261745885] [2023-04-02 01:44:58,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261745885] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:44:58,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997764261] [2023-04-02 01:44:58,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:44:58,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:44:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:44:58,902 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:44:58,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 01:44:59,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-02 01:44:59,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:44:59,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 68 conjunts are in the unsatisfiable core [2023-04-02 01:44:59,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:45:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 11 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 01:45:37,987 INFO L327 TraceCheckSpWp]: Computing backward predicates...