/usr/lib/jvm/java-1.11.0-openjdk-amd64/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 --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 23:56:25,657 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 23:56:25,740 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 23:56:25,747 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 23:56:25,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 23:56:25,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 23:56:25,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 23:56:25,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 23:56:25,780 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 23:56:25,783 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 23:56:25,784 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 23:56:25,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 23:56:25,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 23:56:25,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 23:56:25,786 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 23:56:25,786 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 23:56:25,786 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 23:56:25,786 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 23:56:25,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 23:56:25,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 23:56:25,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 23:56:25,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 23:56:25,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 23:56:25,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 23:56:25,789 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 23:56:25,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 23:56:25,789 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 23:56:25,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 23:56:25,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 23:56:25,790 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 23:56:25,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 23:56:25,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 23:56:25,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 23:56:25,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 23:56:25,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 23:56:25,792 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 23:56:25,792 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 23:56:25,792 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 23:56:25,792 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 23:56:25,793 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 23:56:25,793 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 23:56:25,793 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 23:56:25,793 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 23:56:25,793 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 23:56:26,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 23:56:26,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 23:56:26,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 23:56:26,057 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 23:56:26,057 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 23:56:26,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2023-12-19 23:56:27,253 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 23:56:27,468 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 23:56:27,469 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2023-12-19 23:56:27,475 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d23cc139/d08ef652507143e2a20aef8cd9aa1d58/FLAG4803e22a6 [2023-12-19 23:56:27,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d23cc139/d08ef652507143e2a20aef8cd9aa1d58 [2023-12-19 23:56:27,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 23:56:27,496 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 23:56:27,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 23:56:27,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 23:56:27,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 23:56:27,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12dea632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27, skipping insertion in model container [2023-12-19 23:56:27,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,522 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 23:56:27,681 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c[454,467] [2023-12-19 23:56:27,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 23:56:27,704 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 23:56:27,718 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c[454,467] [2023-12-19 23:56:27,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 23:56:27,731 INFO L206 MainTranslator]: Completed translation [2023-12-19 23:56:27,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27 WrapperNode [2023-12-19 23:56:27,731 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 23:56:27,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 23:56:27,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 23:56:27,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 23:56:27,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,761 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2023-12-19 23:56:27,762 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 23:56:27,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 23:56:27,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 23:56:27,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 23:56:27,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,772 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,781 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 23:56:27,782 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,791 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 23:56:27,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 23:56:27,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 23:56:27,794 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 23:56:27,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (1/1) ... [2023-12-19 23:56:27,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 23:56:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:27,826 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 23:56:27,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 23:56:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 23:56:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 23:56:27,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 23:56:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 23:56:27,867 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-12-19 23:56:27,867 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-12-19 23:56:27,922 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 23:56:27,924 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 23:56:28,031 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 23:56:28,064 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 23:56:28,064 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-19 23:56:28,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:56:28 BoogieIcfgContainer [2023-12-19 23:56:28,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 23:56:28,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 23:56:28,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 23:56:28,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 23:56:28,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 11:56:27" (1/3) ... [2023-12-19 23:56:28,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e13d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:56:28, skipping insertion in model container [2023-12-19 23:56:28,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 11:56:27" (2/3) ... [2023-12-19 23:56:28,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58e13d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 11:56:28, skipping insertion in model container [2023-12-19 23:56:28,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 11:56:28" (3/3) ... [2023-12-19 23:56:28,072 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2023-12-19 23:56:28,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 23:56:28,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 23:56:28,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 23:56:28,148 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=LoopHeads, 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;@768fc75b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 23:56:28,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 23:56:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 23:56:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-19 23:56:28,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:28,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:28,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:28,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2023-12-19 23:56:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915407905] [2023-12-19 23:56:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 23:56:28,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915407905] [2023-12-19 23:56:28,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915407905] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 23:56:28,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 23:56:28,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 23:56:28,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195950366] [2023-12-19 23:56:28,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 23:56:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 23:56:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 23:56:28,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 23:56:28,526 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 23:56:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:28,607 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-12-19 23:56:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 23:56:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-19 23:56:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:28,615 INFO L225 Difference]: With dead ends: 22 [2023-12-19 23:56:28,615 INFO L226 Difference]: Without dead ends: 14 [2023-12-19 23:56:28,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-19 23:56:28,622 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:28,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:28,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-19 23:56:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-19 23:56:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-19 23:56:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-12-19 23:56:28,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2023-12-19 23:56:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:28,656 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-12-19 23:56:28,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-19 23:56:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-12-19 23:56:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-19 23:56:28,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:28,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 23:56:28,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:28,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2023-12-19 23:56:28,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:28,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965102257] [2023-12-19 23:56:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 23:56:28,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:28,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965102257] [2023-12-19 23:56:28,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965102257] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:28,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241241975] [2023-12-19 23:56:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:28,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:28,905 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) [2023-12-19 23:56:28,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 23:56:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:28,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 23:56:28,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 23:56:29,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 23:56:29,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241241975] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:29,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:29,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2023-12-19 23:56:29,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269227170] [2023-12-19 23:56:29,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:29,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 23:56:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 23:56:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-19 23:56:29,155 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 23:56:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:29,198 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-12-19 23:56:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 23:56:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 15 [2023-12-19 23:56:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:29,199 INFO L225 Difference]: With dead ends: 21 [2023-12-19 23:56:29,199 INFO L226 Difference]: Without dead ends: 17 [2023-12-19 23:56:29,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-19 23:56:29,201 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:29,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-19 23:56:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-19 23:56:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 23:56:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-12-19 23:56:29,206 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-12-19 23:56:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:29,206 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-12-19 23:56:29,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-19 23:56:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-12-19 23:56:29,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-19 23:56:29,207 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:29,207 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:29,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 23:56:29,419 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 [2023-12-19 23:56:29,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:29,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2023-12-19 23:56:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351404474] [2023-12-19 23:56:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-19 23:56:29,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351404474] [2023-12-19 23:56:29,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351404474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:29,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33813747] [2023-12-19 23:56:29,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:56:29,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:29,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:29,608 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) [2023-12-19 23:56:29,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 23:56:29,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:56:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:29,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-19 23:56:29,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-19 23:56:29,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-19 23:56:30,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33813747] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:30,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:30,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2023-12-19 23:56:30,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622799611] [2023-12-19 23:56:30,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:30,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 23:56:30,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 23:56:30,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-19 23:56:30,034 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 23:56:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:30,093 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-12-19 23:56:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 23:56:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2023-12-19 23:56:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:30,095 INFO L225 Difference]: With dead ends: 24 [2023-12-19 23:56:30,095 INFO L226 Difference]: Without dead ends: 20 [2023-12-19 23:56:30,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2023-12-19 23:56:30,096 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:30,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-19 23:56:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-19 23:56:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 23:56:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-19 23:56:30,101 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2023-12-19 23:56:30,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:30,102 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-19 23:56:30,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-19 23:56:30,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-19 23:56:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 23:56:30,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:30,103 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:30,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:30,309 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 [2023-12-19 23:56:30,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:30,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:30,310 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2023-12-19 23:56:30,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:30,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132948101] [2023-12-19 23:56:30,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:30,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:30,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:30,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:30,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-19 23:56:30,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:30,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132948101] [2023-12-19 23:56:30,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132948101] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:30,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503648088] [2023-12-19 23:56:30,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:56:30,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:30,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:30,517 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) [2023-12-19 23:56:30,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 23:56:30,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 23:56:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:30,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 23:56:30,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 23:56:30,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 23:56:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503648088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:31,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:31,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2023-12-19 23:56:31,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955787659] [2023-12-19 23:56:31,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:31,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 23:56:31,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 23:56:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-12-19 23:56:31,022 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-19 23:56:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:31,092 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-19 23:56:31,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-19 23:56:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 27 [2023-12-19 23:56:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:31,097 INFO L225 Difference]: With dead ends: 27 [2023-12-19 23:56:31,097 INFO L226 Difference]: Without dead ends: 23 [2023-12-19 23:56:31,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2023-12-19 23:56:31,098 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:31,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-19 23:56:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-19 23:56:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 23:56:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-19 23:56:31,103 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2023-12-19 23:56:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:31,103 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-19 23:56:31,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-19 23:56:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-19 23:56:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-19 23:56:31,104 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:31,104 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:31,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:31,312 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 [2023-12-19 23:56:31,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:31,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2023-12-19 23:56:31,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:31,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509170990] [2023-12-19 23:56:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:31,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-19 23:56:31,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509170990] [2023-12-19 23:56:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509170990] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862426691] [2023-12-19 23:56:31,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:56:31,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:31,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:31,539 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) [2023-12-19 23:56:31,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 23:56:31,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:56:31,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:31,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 23:56:31,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-19 23:56:31,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-19 23:56:32,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862426691] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:32,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:32,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2023-12-19 23:56:32,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621489758] [2023-12-19 23:56:32,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:32,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 23:56:32,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:32,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 23:56:32,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-12-19 23:56:32,247 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-19 23:56:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:32,311 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-12-19 23:56:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 23:56:32,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 33 [2023-12-19 23:56:32,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:32,317 INFO L225 Difference]: With dead ends: 30 [2023-12-19 23:56:32,317 INFO L226 Difference]: Without dead ends: 26 [2023-12-19 23:56:32,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-12-19 23:56:32,319 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:32,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-19 23:56:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-12-19 23:56:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-19 23:56:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-12-19 23:56:32,331 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2023-12-19 23:56:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:32,331 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-12-19 23:56:32,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-19 23:56:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-12-19 23:56:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-19 23:56:32,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:32,333 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:32,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:32,539 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 [2023-12-19 23:56:32,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:32,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2023-12-19 23:56:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:32,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672296226] [2023-12-19 23:56:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:32,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-19 23:56:32,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:32,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672296226] [2023-12-19 23:56:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672296226] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174682896] [2023-12-19 23:56:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:56:32,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:32,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:32,801 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) [2023-12-19 23:56:32,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 23:56:32,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-19 23:56:32,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:32,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-19 23:56:32,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-19 23:56:32,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 23:56:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174682896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:33,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:33,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2023-12-19 23:56:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622226151] [2023-12-19 23:56:33,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:33,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 23:56:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 23:56:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-12-19 23:56:33,960 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-19 23:56:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:34,047 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-12-19 23:56:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 23:56:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 39 [2023-12-19 23:56:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:34,050 INFO L225 Difference]: With dead ends: 33 [2023-12-19 23:56:34,050 INFO L226 Difference]: Without dead ends: 29 [2023-12-19 23:56:34,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2023-12-19 23:56:34,053 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:34,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 49 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-19 23:56:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-19 23:56:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-19 23:56:34,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-12-19 23:56:34,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2023-12-19 23:56:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:34,066 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-12-19 23:56:34,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-19 23:56:34,066 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-12-19 23:56:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-19 23:56:34,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:34,068 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:34,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:34,273 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 [2023-12-19 23:56:34,274 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:34,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:34,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2023-12-19 23:56:34,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:34,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613930990] [2023-12-19 23:56:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:34,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-19 23:56:34,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613930990] [2023-12-19 23:56:34,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613930990] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:34,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150250487] [2023-12-19 23:56:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:56:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:34,625 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) [2023-12-19 23:56:34,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 23:56:34,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-19 23:56:34,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:34,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-19 23:56:34,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-19 23:56:34,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-19 23:56:36,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150250487] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:36,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:36,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2023-12-19 23:56:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526511190] [2023-12-19 23:56:36,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:36,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 23:56:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:36,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 23:56:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-12-19 23:56:36,187 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-19 23:56:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:36,274 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-12-19 23:56:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 23:56:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 45 [2023-12-19 23:56:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:36,277 INFO L225 Difference]: With dead ends: 36 [2023-12-19 23:56:36,278 INFO L226 Difference]: Without dead ends: 32 [2023-12-19 23:56:36,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2023-12-19 23:56:36,279 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:36,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 54 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-19 23:56:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-19 23:56:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-19 23:56:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-12-19 23:56:36,287 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2023-12-19 23:56:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:36,287 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-12-19 23:56:36,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-12-19 23:56:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-12-19 23:56:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-19 23:56:36,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:36,292 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:36,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-19 23:56:36,492 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 [2023-12-19 23:56:36,493 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:36,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2023-12-19 23:56:36,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:36,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428887239] [2023-12-19 23:56:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-19 23:56:36,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428887239] [2023-12-19 23:56:36,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428887239] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:36,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276255534] [2023-12-19 23:56:36,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:56:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:36,818 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) [2023-12-19 23:56:36,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 23:56:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:36,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-19 23:56:36,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-19 23:56:36,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 23:56:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276255534] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:38,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:38,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2023-12-19 23:56:38,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213086798] [2023-12-19 23:56:38,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:38,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-19 23:56:38,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:38,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-19 23:56:38,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2023-12-19 23:56:38,905 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-19 23:56:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:39,010 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-12-19 23:56:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 23:56:39,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 51 [2023-12-19 23:56:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:39,012 INFO L225 Difference]: With dead ends: 39 [2023-12-19 23:56:39,012 INFO L226 Difference]: Without dead ends: 35 [2023-12-19 23:56:39,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2023-12-19 23:56:39,014 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:39,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:39,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-19 23:56:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-12-19 23:56:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-19 23:56:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-12-19 23:56:39,018 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2023-12-19 23:56:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:39,018 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-12-19 23:56:39,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-12-19 23:56:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-12-19 23:56:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-19 23:56:39,019 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:39,019 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:39,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:39,227 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 [2023-12-19 23:56:39,228 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:39,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:39,228 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2023-12-19 23:56:39,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:39,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68735815] [2023-12-19 23:56:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:39,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-19 23:56:39,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68735815] [2023-12-19 23:56:39,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68735815] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802035251] [2023-12-19 23:56:39,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:56:39,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:39,645 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) [2023-12-19 23:56:39,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 23:56:39,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:56:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:39,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-19 23:56:39,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-19 23:56:39,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-19 23:56:42,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802035251] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:42,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:42,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2023-12-19 23:56:42,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153378072] [2023-12-19 23:56:42,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:42,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 23:56:42,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:42,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 23:56:42,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2023-12-19 23:56:42,452 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-12-19 23:56:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:42,557 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2023-12-19 23:56:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 23:56:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 57 [2023-12-19 23:56:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:42,565 INFO L225 Difference]: With dead ends: 42 [2023-12-19 23:56:42,565 INFO L226 Difference]: Without dead ends: 38 [2023-12-19 23:56:42,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=387, Invalid=803, Unknown=0, NotChecked=0, Total=1190 [2023-12-19 23:56:42,567 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:42,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:56:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-19 23:56:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-19 23:56:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-19 23:56:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-12-19 23:56:42,573 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2023-12-19 23:56:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:42,573 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-12-19 23:56:42,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-12-19 23:56:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-12-19 23:56:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-19 23:56:42,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:42,576 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:42,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:42,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-19 23:56:42,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:42,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2023-12-19 23:56:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:42,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3644602] [2023-12-19 23:56:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:42,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:42,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-19 23:56:43,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3644602] [2023-12-19 23:56:43,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3644602] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:43,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164028201] [2023-12-19 23:56:43,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:56:43,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:43,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:43,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 23:56:43,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-19 23:56:43,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:43,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-19 23:56:43,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-12-19 23:56:43,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-19 23:56:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164028201] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:46,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:46,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2023-12-19 23:56:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900385251] [2023-12-19 23:56:46,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:46,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 23:56:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:46,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 23:56:46,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2023-12-19 23:56:46,931 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2023-12-19 23:56:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:47,067 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-12-19 23:56:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 23:56:47,072 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 63 [2023-12-19 23:56:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:47,075 INFO L225 Difference]: With dead ends: 45 [2023-12-19 23:56:47,075 INFO L226 Difference]: Without dead ends: 41 [2023-12-19 23:56:47,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 23:56:47,077 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:47,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:56:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-19 23:56:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-19 23:56:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-12-19 23:56:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-12-19 23:56:47,082 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2023-12-19 23:56:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:47,082 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-12-19 23:56:47,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2023-12-19 23:56:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-12-19 23:56:47,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-19 23:56:47,083 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:47,084 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:47,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:47,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 23:56:47,290 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:47,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2023-12-19 23:56:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101451784] [2023-12-19 23:56:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:47,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-12-19 23:56:47,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:47,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101451784] [2023-12-19 23:56:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101451784] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:47,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979238595] [2023-12-19 23:56:47,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:56:47,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:47,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:47,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:47,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 23:56:48,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:56:48,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:48,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 23:56:48,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-12-19 23:56:48,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:56:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-12-19 23:56:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979238595] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:56:52,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:56:52,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2023-12-19 23:56:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770606326] [2023-12-19 23:56:52,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:56:52,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-19 23:56:52,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:56:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-19 23:56:52,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2023-12-19 23:56:52,713 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2023-12-19 23:56:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:56:52,838 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-12-19 23:56:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 23:56:52,839 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 69 [2023-12-19 23:56:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:56:52,840 INFO L225 Difference]: With dead ends: 48 [2023-12-19 23:56:52,840 INFO L226 Difference]: Without dead ends: 44 [2023-12-19 23:56:52,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=1105, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 23:56:52,841 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 23:56:52,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 78 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 23:56:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-19 23:56:52,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-19 23:56:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-19 23:56:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-12-19 23:56:52,845 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2023-12-19 23:56:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:56:52,845 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-12-19 23:56:52,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2023-12-19 23:56:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-12-19 23:56:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-19 23:56:52,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:56:52,846 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:56:52,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-19 23:56:53,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 23:56:53,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:56:53,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:56:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2023-12-19 23:56:53,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:56:53,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214215937] [2023-12-19 23:56:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:56:53,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:56:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:56:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:56:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:56:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-12-19 23:56:53,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:56:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214215937] [2023-12-19 23:56:53,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214215937] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:56:53,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68673774] [2023-12-19 23:56:53,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:56:53,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:56:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:56:53,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:56:53,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 23:56:54,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-19 23:56:54,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:56:54,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 23:56:54,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:56:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-12-19 23:56:54,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-19 23:57:00,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68673774] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:00,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2023-12-19 23:57:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961223529] [2023-12-19 23:57:00,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 23:57:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 23:57:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2023-12-19 23:57:00,215 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2023-12-19 23:57:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:00,371 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-12-19 23:57:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 23:57:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 75 [2023-12-19 23:57:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:00,373 INFO L225 Difference]: With dead ends: 51 [2023-12-19 23:57:00,373 INFO L226 Difference]: Without dead ends: 47 [2023-12-19 23:57:00,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 23:57:00,377 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:00,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 80 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-19 23:57:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-19 23:57:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-19 23:57:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-19 23:57:00,381 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2023-12-19 23:57:00,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:00,381 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-19 23:57:00,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2023-12-19 23:57:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-19 23:57:00,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-19 23:57:00,382 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:00,382 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:00,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:00,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 23:57:00,593 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:00,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2023-12-19 23:57:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:00,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158957467] [2023-12-19 23:57:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:00,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:00,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:00,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:00,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:00,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-12-19 23:57:01,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:01,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158957467] [2023-12-19 23:57:01,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158957467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:01,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647805459] [2023-12-19 23:57:01,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:57:01,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:01,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:01,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 23:57:01,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-12-19 23:57:01,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:01,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-19 23:57:01,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-12-19 23:57:01,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-19 23:57:09,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647805459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:09,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:09,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2023-12-19 23:57:09,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468354182] [2023-12-19 23:57:09,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:09,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-19 23:57:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:09,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-19 23:57:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2023-12-19 23:57:09,309 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2023-12-19 23:57:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:09,517 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2023-12-19 23:57:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-19 23:57:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 81 [2023-12-19 23:57:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:09,519 INFO L225 Difference]: With dead ends: 54 [2023-12-19 23:57:09,519 INFO L226 Difference]: Without dead ends: 50 [2023-12-19 23:57:09,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 23:57:09,521 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 215 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:09,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 89 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:09,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-19 23:57:09,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-19 23:57:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-19 23:57:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-12-19 23:57:09,525 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2023-12-19 23:57:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:09,525 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-12-19 23:57:09,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2023-12-19 23:57:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-12-19 23:57:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-19 23:57:09,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:09,527 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:09,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:09,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 23:57:09,728 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:09,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2023-12-19 23:57:09,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:09,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207953055] [2023-12-19 23:57:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:09,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2023-12-19 23:57:10,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207953055] [2023-12-19 23:57:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207953055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992903673] [2023-12-19 23:57:10,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:57:10,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:10,536 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:10,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 23:57:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:11,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-19 23:57:11,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2023-12-19 23:57:11,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-19 23:57:20,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992903673] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:20,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:20,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2023-12-19 23:57:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319880967] [2023-12-19 23:57:20,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:20,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-19 23:57:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-19 23:57:20,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 23:57:20,845 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2023-12-19 23:57:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:21,034 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-12-19 23:57:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-19 23:57:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 87 [2023-12-19 23:57:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:21,035 INFO L225 Difference]: With dead ends: 57 [2023-12-19 23:57:21,035 INFO L226 Difference]: Without dead ends: 53 [2023-12-19 23:57:21,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 168 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=802, Invalid=1648, Unknown=0, NotChecked=0, Total=2450 [2023-12-19 23:57:21,036 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 120 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:21,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 93 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-19 23:57:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-19 23:57:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2023-12-19 23:57:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-12-19 23:57:21,040 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2023-12-19 23:57:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:21,041 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-12-19 23:57:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2023-12-19 23:57:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-12-19 23:57:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-19 23:57:21,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:21,042 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:21,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:21,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-19 23:57:21,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:21,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:21,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2023-12-19 23:57:21,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:21,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812442742] [2023-12-19 23:57:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:21,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:22,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:22,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2023-12-19 23:57:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812442742] [2023-12-19 23:57:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812442742] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:22,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801752579] [2023-12-19 23:57:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:57:22,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:22,072 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:22,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 23:57:22,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:57:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:22,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 23:57:22,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2023-12-19 23:57:22,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-19 23:57:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801752579] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:34,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:34,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2023-12-19 23:57:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584731204] [2023-12-19 23:57:34,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:34,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-12-19 23:57:34,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-12-19 23:57:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2023-12-19 23:57:34,623 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2023-12-19 23:57:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:34,808 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-12-19 23:57:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 23:57:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 93 [2023-12-19 23:57:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:34,813 INFO L225 Difference]: With dead ends: 60 [2023-12-19 23:57:34,813 INFO L226 Difference]: Without dead ends: 56 [2023-12-19 23:57:34,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 180 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=1853, Unknown=0, NotChecked=0, Total=2756 [2023-12-19 23:57:34,815 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 153 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:34,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 99 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-19 23:57:34,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-12-19 23:57:34,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-19 23:57:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-12-19 23:57:34,819 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2023-12-19 23:57:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:34,819 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-12-19 23:57:34,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2023-12-19 23:57:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-12-19 23:57:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-19 23:57:34,820 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:34,821 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:34,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-19 23:57:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:35,033 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:35,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:35,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2023-12-19 23:57:35,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:35,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657771856] [2023-12-19 23:57:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:35,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-12-19 23:57:35,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:35,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657771856] [2023-12-19 23:57:35,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657771856] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:35,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314560915] [2023-12-19 23:57:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:57:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:35,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:35,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 23:57:36,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2023-12-19 23:57:36,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:36,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-19 23:57:36,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-12-19 23:57:36,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:57:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-19 23:57:51,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314560915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:57:51,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:57:51,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2023-12-19 23:57:51,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926150315] [2023-12-19 23:57:51,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:57:51,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-19 23:57:51,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:57:51,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-19 23:57:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2023-12-19 23:57:51,600 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2023-12-19 23:57:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:57:51,793 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2023-12-19 23:57:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 23:57:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 99 [2023-12-19 23:57:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:57:51,794 INFO L225 Difference]: With dead ends: 63 [2023-12-19 23:57:51,794 INFO L226 Difference]: Without dead ends: 59 [2023-12-19 23:57:51,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 192 SyntacticMatches, 16 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1010, Invalid=2070, Unknown=0, NotChecked=0, Total=3080 [2023-12-19 23:57:51,795 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:57:51,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 99 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:57:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-19 23:57:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-19 23:57:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-19 23:57:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2023-12-19 23:57:51,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2023-12-19 23:57:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:57:51,800 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2023-12-19 23:57:51,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2023-12-19 23:57:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2023-12-19 23:57:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-19 23:57:51,801 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:57:51,801 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:57:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 23:57:52,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 23:57:52,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:57:52,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:57:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2023-12-19 23:57:52,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:57:52,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328047080] [2023-12-19 23:57:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:57:52,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:57:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:57:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:53,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:53,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:53,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:57:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:57:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-19 23:57:53,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:57:53,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328047080] [2023-12-19 23:57:53,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328047080] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:57:53,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245314352] [2023-12-19 23:57:53,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 23:57:53,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:57:53,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:57:53,084 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:57:53,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 23:57:54,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 23:57:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:57:54,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-19 23:57:54,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:57:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-19 23:57:54,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:58:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-19 23:58:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245314352] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:58:12,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:58:12,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2023-12-19 23:58:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733728022] [2023-12-19 23:58:12,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:58:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-19 23:58:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:58:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-19 23:58:12,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2023-12-19 23:58:12,160 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2023-12-19 23:58:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:58:12,358 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2023-12-19 23:58:12,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-19 23:58:12,359 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 105 [2023-12-19 23:58:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:58:12,360 INFO L225 Difference]: With dead ends: 66 [2023-12-19 23:58:12,360 INFO L226 Difference]: Without dead ends: 62 [2023-12-19 23:58:12,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 204 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2023-12-19 23:58:12,361 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:58:12,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 103 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:58:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-19 23:58:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-19 23:58:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-19 23:58:12,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-12-19 23:58:12,365 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2023-12-19 23:58:12,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:58:12,365 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-12-19 23:58:12,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2023-12-19 23:58:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-12-19 23:58:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-19 23:58:12,366 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:58:12,366 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:58:12,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 23:58:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 23:58:12,576 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:58:12,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:58:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash -543729842, now seen corresponding path program 17 times [2023-12-19 23:58:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:58:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479416086] [2023-12-19 23:58:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:58:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:58:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:12,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:58:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:12,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:12,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2023-12-19 23:58:13,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:58:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479416086] [2023-12-19 23:58:13,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479416086] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:58:13,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784319030] [2023-12-19 23:58:13,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 23:58:13,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:58:13,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:58:13,747 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:58:13,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 23:58:14,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-12-19 23:58:14,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:58:14,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 23:58:14,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:58:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-12-19 23:58:15,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:58:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-19 23:58:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784319030] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:58:36,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:58:36,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2023-12-19 23:58:36,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988489782] [2023-12-19 23:58:36,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:58:36,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-19 23:58:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:58:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-19 23:58:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2023-12-19 23:58:36,836 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2023-12-19 23:58:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:58:37,088 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2023-12-19 23:58:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-19 23:58:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 111 [2023-12-19 23:58:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:58:37,090 INFO L225 Difference]: With dead ends: 69 [2023-12-19 23:58:37,090 INFO L226 Difference]: Without dead ends: 65 [2023-12-19 23:58:37,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 216 SyntacticMatches, 18 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1242, Invalid=2540, Unknown=0, NotChecked=0, Total=3782 [2023-12-19 23:58:37,092 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:58:37,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 110 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:58:37,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-19 23:58:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-19 23:58:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-19 23:58:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-12-19 23:58:37,100 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2023-12-19 23:58:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:58:37,102 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-12-19 23:58:37,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2023-12-19 23:58:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-12-19 23:58:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-12-19 23:58:37,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:58:37,103 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:58:37,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 23:58:37,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 23:58:37,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:58:37,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:58:37,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1011974276, now seen corresponding path program 18 times [2023-12-19 23:58:37,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:58:37,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295775708] [2023-12-19 23:58:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:58:37,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:58:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:37,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:58:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:37,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:37,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:37,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:58:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:58:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2023-12-19 23:58:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:58:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295775708] [2023-12-19 23:58:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295775708] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:58:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730064650] [2023-12-19 23:58:38,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 23:58:38,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:58:38,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:58:38,624 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:58:38,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 23:58:40,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-12-19 23:58:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:58:40,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 23:58:40,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:58:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-19 23:58:40,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:59:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-12-19 23:59:06,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730064650] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:59:06,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:59:06,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2023-12-19 23:59:06,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602943530] [2023-12-19 23:59:06,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:59:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-19 23:59:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:59:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-19 23:59:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2023-12-19 23:59:06,523 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2023-12-19 23:59:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:59:06,792 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2023-12-19 23:59:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-19 23:59:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 117 [2023-12-19 23:59:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:59:06,793 INFO L225 Difference]: With dead ends: 72 [2023-12-19 23:59:06,793 INFO L226 Difference]: Without dead ends: 68 [2023-12-19 23:59:06,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 228 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1367, Invalid=2793, Unknown=0, NotChecked=0, Total=4160 [2023-12-19 23:59:06,794 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 150 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:59:06,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 119 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:59:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-19 23:59:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-19 23:59:06,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-19 23:59:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-12-19 23:59:06,798 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2023-12-19 23:59:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:59:06,798 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-12-19 23:59:06,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2023-12-19 23:59:06,798 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-12-19 23:59:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-19 23:59:06,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:59:06,799 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:59:06,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 23:59:07,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:07,008 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:59:07,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:59:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 486282894, now seen corresponding path program 19 times [2023-12-19 23:59:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:59:07,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239467618] [2023-12-19 23:59:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:59:07,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:59:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:59:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:07,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:08,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-12-19 23:59:08,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:59:08,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239467618] [2023-12-19 23:59:08,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239467618] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:59:08,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342032869] [2023-12-19 23:59:08,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 23:59:08,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:59:08,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:59:08,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 23:59:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:10,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-19 23:59:10,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:59:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2023-12-19 23:59:10,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:59:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-19 23:59:41,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342032869] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:59:41,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:59:41,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 47 [2023-12-19 23:59:41,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318286265] [2023-12-19 23:59:41,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:59:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-19 23:59:41,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:59:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-19 23:59:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 23:59:41,821 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2023-12-19 23:59:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:59:42,062 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2023-12-19 23:59:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 23:59:42,063 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) Word has length 123 [2023-12-19 23:59:42,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:59:42,064 INFO L225 Difference]: With dead ends: 75 [2023-12-19 23:59:42,064 INFO L226 Difference]: Without dead ends: 71 [2023-12-19 23:59:42,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 240 SyntacticMatches, 21 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1495, Invalid=2927, Unknown=0, NotChecked=0, Total=4422 [2023-12-19 23:59:42,065 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:59:42,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 123 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:59:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-19 23:59:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-12-19 23:59:42,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 23:59:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2023-12-19 23:59:42,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2023-12-19 23:59:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:59:42,069 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2023-12-19 23:59:42,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2023-12-19 23:59:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2023-12-19 23:59:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-19 23:59:42,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:59:42,073 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:59:42,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-19 23:59:42,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:42,276 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:59:42,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:59:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1510268740, now seen corresponding path program 20 times [2023-12-19 23:59:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:59:42,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32556538] [2023-12-19 23:59:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:59:42,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:59:42,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:59:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 20 proven. 610 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2023-12-19 23:59:44,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:59:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32556538] [2023-12-19 23:59:44,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32556538] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:59:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734270725] [2023-12-19 23:59:44,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 23:59:44,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:44,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:59:44,640 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:59:44,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 23:59:46,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 23:59:46,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:59:46,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-19 23:59:46,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:59:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2023-12-19 23:59:46,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 23:59:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2023-12-19 23:59:48,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734270725] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 23:59:48,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 23:59:48,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 47 [2023-12-19 23:59:48,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671263119] [2023-12-19 23:59:48,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 23:59:48,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-19 23:59:48,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:59:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-19 23:59:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2023-12-19 23:59:48,253 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 26 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 21 states have call predecessors, (22), 1 states have call successors, (22) [2023-12-19 23:59:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:59:49,673 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2023-12-19 23:59:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-19 23:59:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 26 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 21 states have call predecessors, (22), 1 states have call successors, (22) Word has length 129 [2023-12-19 23:59:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:59:49,674 INFO L225 Difference]: With dead ends: 78 [2023-12-19 23:59:49,674 INFO L226 Difference]: Without dead ends: 74 [2023-12-19 23:59:49,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2023-12-19 23:59:49,677 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-19 23:59:49,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1081 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-19 23:59:49,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-19 23:59:49,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-12-19 23:59:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-19 23:59:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-12-19 23:59:49,681 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2023-12-19 23:59:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:59:49,681 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-12-19 23:59:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 26 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 21 states have call predecessors, (22), 1 states have call successors, (22) [2023-12-19 23:59:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-12-19 23:59:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-19 23:59:49,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 23:59:49,683 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 23:59:49,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-19 23:59:49,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-19 23:59:49,891 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 23:59:49,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 23:59:49,891 INFO L85 PathProgramCache]: Analyzing trace with hash -92396082, now seen corresponding path program 21 times [2023-12-19 23:59:49,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 23:59:49,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218219596] [2023-12-19 23:59:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 23:59:49,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 23:59:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 23:59:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:50,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-12-19 23:59:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 23:59:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 63 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2023-12-19 23:59:51,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 23:59:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218219596] [2023-12-19 23:59:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218219596] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 23:59:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006687150] [2023-12-19 23:59:51,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 23:59:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 23:59:51,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 23:59:51,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 23:59:51,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 23:59:53,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-12-19 23:59:53,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 23:59:53,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-19 23:59:53,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 23:59:53,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-12-19 23:59:53,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 23:59:53,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006687150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 23:59:53,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 23:59:53,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [27] total 29 [2023-12-19 23:59:53,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711825723] [2023-12-19 23:59:53,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 23:59:53,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-19 23:59:53,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 23:59:53,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-19 23:59:53,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2023-12-19 23:59:53,957 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 23:59:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 23:59:54,338 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2023-12-19 23:59:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-19 23:59:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) Word has length 135 [2023-12-19 23:59:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 23:59:54,339 INFO L225 Difference]: With dead ends: 74 [2023-12-19 23:59:54,339 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 23:59:54,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=840, Invalid=1710, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 23:59:54,340 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 23:59:54,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 217 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 23:59:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 23:59:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 23:59:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 23:59:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 23:59:54,341 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2023-12-19 23:59:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 23:59:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 23:59:54,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2023-12-19 23:59:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 23:59:54,342 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 23:59:54,344 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 23:59:54,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 23:59:54,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-19 23:59:54,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 23:59:54,556 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-19 23:59:54,556 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2023-12-19 23:59:54,556 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-12-19 23:59:54,556 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (= |ULTIMATE.start_main_~input~0#1| 20) [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 9) the Hoare annotation is: true [2023-12-19 23:59:54,557 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-19 23:59:54,557 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2023-12-19 23:59:54,560 INFO L445 BasicCegarLoop]: Path program histogram: [21, 1] [2023-12-19 23:59:54,562 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 23:59:54,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 11:59:54 BoogieIcfgContainer [2023-12-19 23:59:54,565 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 23:59:54,565 INFO L158 Benchmark]: Toolchain (without parser) took 207069.60ms. Allocated memory was 186.6MB in the beginning and 746.6MB in the end (delta: 559.9MB). Free memory was 143.8MB in the beginning and 387.5MB in the end (delta: -243.7MB). Peak memory consumption was 316.9MB. Max. memory is 8.0GB. [2023-12-19 23:59:54,569 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 186.6MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 23:59:54,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.08ms. Allocated memory is still 186.6MB. Free memory was 143.8MB in the beginning and 133.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 23:59:54,570 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.73ms. Allocated memory is still 186.6MB. Free memory was 133.3MB in the beginning and 131.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 23:59:54,570 INFO L158 Benchmark]: Boogie Preprocessor took 30.71ms. Allocated memory is still 186.6MB. Free memory was 131.9MB in the beginning and 130.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 23:59:54,570 INFO L158 Benchmark]: RCFGBuilder took 271.21ms. Allocated memory is still 186.6MB. Free memory was 130.5MB in the beginning and 121.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2023-12-19 23:59:54,571 INFO L158 Benchmark]: TraceAbstraction took 206497.91ms. Allocated memory was 186.6MB in the beginning and 746.6MB in the end (delta: 559.9MB). Free memory was 120.7MB in the beginning and 387.5MB in the end (delta: -266.8MB). Peak memory consumption was 293.8MB. Max. memory is 8.0GB. [2023-12-19 23:59:54,574 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 186.6MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 233.08ms. Allocated memory is still 186.6MB. Free memory was 143.8MB in the beginning and 133.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.73ms. Allocated memory is still 186.6MB. Free memory was 133.3MB in the beginning and 131.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.71ms. Allocated memory is still 186.6MB. Free memory was 131.9MB in the beginning and 130.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 271.21ms. Allocated memory is still 186.6MB. Free memory was 130.5MB in the beginning and 121.4MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 206497.91ms. Allocated memory was 186.6MB in the beginning and 746.6MB in the end (delta: 559.9MB). Free memory was 120.7MB in the beginning and 387.5MB in the end (delta: -266.8MB). Peak memory consumption was 293.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 206.4s, OverallIterations: 22, TraceHistogramMax: 22, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1891 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1618 mSDsluCounter, 2760 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2527 mSDsCounter, 583 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3734 IncrementalHoareTripleChecker+Invalid, 4317 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 583 mSolverCounterUnsat, 233 mSDtfsCounter, 3734 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4072 GetRequests, 2983 SyntacticMatches, 210 SemanticMatches, 879 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14961 ImplicationChecksByTransitivity, 9.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=21, InterpolantAutomatonStates: 362, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 7 HoareAnnotationTreeSize, 5 FormulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FormulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 183.1s InterpolantComputationTime, 3159 NumberOfCodeBlocks, 3159 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 4536 ConstructedInterpolants, 0 QuantifiedInterpolants, 13206 SizeOfPredicates, 231 NumberOfNonLiveVariables, 4116 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 63 InterpolantComputations, 2 PerfectInterpolantSequences, 13195/29148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-19 23:59:54,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...