/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 07:34:11,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 07:34:11,836 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 07:34:11,840 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 07:34:11,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 07:34:11,868 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 07:34:11,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 07:34:11,869 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 07:34:11,870 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 07:34:11,873 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 07:34:11,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 07:34:11,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 07:34:11,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 07:34:11,875 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 07:34:11,875 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 07:34:11,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 07:34:11,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 07:34:11,876 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 07:34:11,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 07:34:11,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 07:34:11,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 07:34:11,878 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 07:34:11,878 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 07:34:11,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 07:34:11,878 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 07:34:11,879 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 07:34:11,879 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 07:34:11,879 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 07:34:11,879 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 07:34:11,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 07:34:11,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 07:34:11,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 07:34:11,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:34:11,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 07:34:11,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 07:34:11,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 07:34:11,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 07:34:11,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 07:34:11,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 07:34:11,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 07:34:11,882 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 07:34:11,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 07:34:11,883 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 07:34:11,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 07:34:12,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 07:34:12,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 07:34:12,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 07:34:12,125 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 07:34:12,125 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 07:34:12,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2023-12-20 07:34:13,265 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 07:34:13,455 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 07:34:13,455 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2023-12-20 07:34:13,460 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b040dea10/7449d3e137a34838b33cf0c27772125e/FLAG19035ca63 [2023-12-20 07:34:13,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b040dea10/7449d3e137a34838b33cf0c27772125e [2023-12-20 07:34:13,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 07:34:13,474 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 07:34:13,474 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 07:34:13,475 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 07:34:13,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 07:34:13,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9baa7a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13, skipping insertion in model container [2023-12-20 07:34:13,480 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 07:34:13,620 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i[1293,1306] [2023-12-20 07:34:13,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:34:13,630 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 07:34:13,649 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i[1293,1306] [2023-12-20 07:34:13,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 07:34:13,662 INFO L206 MainTranslator]: Completed translation [2023-12-20 07:34:13,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13 WrapperNode [2023-12-20 07:34:13,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 07:34:13,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 07:34:13,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 07:34:13,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 07:34:13,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,689 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-20 07:34:13,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 07:34:13,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 07:34:13,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 07:34:13,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 07:34:13,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,699 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,709 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2023-12-20 07:34:13,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,718 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,719 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 07:34:13,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 07:34:13,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 07:34:13,722 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 07:34:13,723 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (1/1) ... [2023-12-20 07:34:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 07:34:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:13,747 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) [2023-12-20 07:34:13,749 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 [2023-12-20 07:34:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 07:34:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 07:34:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 07:34:13,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 07:34:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-12-20 07:34:13,768 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-12-20 07:34:13,828 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 07:34:13,830 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 07:34:13,959 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 07:34:14,014 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 07:34:14,014 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 07:34:14,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:34:14 BoogieIcfgContainer [2023-12-20 07:34:14,015 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 07:34:14,017 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 07:34:14,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 07:34:14,019 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 07:34:14,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 07:34:13" (1/3) ... [2023-12-20 07:34:14,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ad1484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:34:14, skipping insertion in model container [2023-12-20 07:34:14,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 07:34:13" (2/3) ... [2023-12-20 07:34:14,020 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24ad1484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 07:34:14, skipping insertion in model container [2023-12-20 07:34:14,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 07:34:14" (3/3) ... [2023-12-20 07:34:14,022 INFO L112 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2023-12-20 07:34:14,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 07:34:14,043 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 07:34:14,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 07:34:14,100 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;@723a6b40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 07:34:14,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 07:34:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:14,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 07:34:14,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:14,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:14,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:14,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:14,117 INFO L85 PathProgramCache]: Analyzing trace with hash -110337137, now seen corresponding path program 1 times [2023-12-20 07:34:14,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282699943] [2023-12-20 07:34:14,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-12-20 07:34:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-12-20 07:34:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 07:34:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 07:34:14,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282699943] [2023-12-20 07:34:14,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282699943] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:34:14,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 07:34:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-20 07:34:14,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82942725] [2023-12-20 07:34:14,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:34:14,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:34:14,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:14,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:34:14,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:34:14,440 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:34:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:14,493 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2023-12-20 07:34:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:34:14,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-20 07:34:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:14,501 INFO L225 Difference]: With dead ends: 43 [2023-12-20 07:34:14,501 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 07:34:14,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-20 07:34:14,505 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:14,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 07:34:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-20 07:34:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-12-20 07:34:14,531 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 25 [2023-12-20 07:34:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:14,531 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-12-20 07:34:14,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 07:34:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-12-20 07:34:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 07:34:14,533 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:14,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:14,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 07:34:14,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:14,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1417820460, now seen corresponding path program 1 times [2023-12-20 07:34:14,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:14,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258965782] [2023-12-20 07:34:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:14,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:34:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-12-20 07:34:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-12-20 07:34:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 07:34:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258965782] [2023-12-20 07:34:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258965782] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:14,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768556652] [2023-12-20 07:34:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:14,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:14,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:14,702 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) [2023-12-20 07:34:14,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 07:34:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:14,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:34:14,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-20 07:34:14,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:34:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768556652] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:34:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:34:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-12-20 07:34:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169322194] [2023-12-20 07:34:14,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:34:14,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:34:14,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:14,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:34:14,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:34:14,829 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:14,858 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2023-12-20 07:34:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:34:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-20 07:34:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:14,859 INFO L225 Difference]: With dead ends: 40 [2023-12-20 07:34:14,860 INFO L226 Difference]: Without dead ends: 24 [2023-12-20 07:34:14,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 07:34:14,863 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:14,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-20 07:34:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-12-20 07:34:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-20 07:34:14,876 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 26 [2023-12-20 07:34:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:14,877 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-20 07:34:14,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:14,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-20 07:34:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 07:34:14,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:14,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:14,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:15,088 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 [2023-12-20 07:34:15,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:15,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1584330763, now seen corresponding path program 1 times [2023-12-20 07:34:15,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:15,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123357189] [2023-12-20 07:34:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:15,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:34:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-12-20 07:34:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-20 07:34:15,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123357189] [2023-12-20 07:34:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123357189] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21496301] [2023-12-20 07:34:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:15,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:15,261 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) [2023-12-20 07:34:15,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 07:34:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-20 07:34:15,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-20 07:34:15,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 07:34:15,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21496301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 07:34:15,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-20 07:34:15,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-12-20 07:34:15,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154098247] [2023-12-20 07:34:15,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 07:34:15,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-20 07:34:15,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-20 07:34:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:34:15,378 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:15,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:15,397 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2023-12-20 07:34:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-20 07:34:15,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-12-20 07:34:15,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:15,399 INFO L225 Difference]: With dead ends: 36 [2023-12-20 07:34:15,399 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 07:34:15,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-20 07:34:15,400 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:15,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 07:34:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-20 07:34:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-12-20 07:34:15,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2023-12-20 07:34:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:15,406 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-12-20 07:34:15,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 07:34:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-12-20 07:34:15,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 07:34:15,407 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:15,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:15,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:15,613 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 [2023-12-20 07:34:15,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:15,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:15,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1105168803, now seen corresponding path program 1 times [2023-12-20 07:34:15,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:15,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137137713] [2023-12-20 07:34:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-20 07:34:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 07:34:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 07:34:15,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137137713] [2023-12-20 07:34:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137137713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891546709] [2023-12-20 07:34:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:15,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:15,821 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) [2023-12-20 07:34:15,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 07:34:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:15,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-20 07:34:15,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 07:34:15,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-20 07:34:15,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891546709] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:15,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:15,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 9 [2023-12-20 07:34:15,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454554578] [2023-12-20 07:34:15,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:15,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 07:34:15,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 07:34:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-20 07:34:15,981 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:34:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:16,024 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2023-12-20 07:34:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 07:34:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 36 [2023-12-20 07:34:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:16,025 INFO L225 Difference]: With dead ends: 51 [2023-12-20 07:34:16,025 INFO L226 Difference]: Without dead ends: 31 [2023-12-20 07:34:16,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-20 07:34:16,026 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:16,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-20 07:34:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-20 07:34:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-20 07:34:16,031 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 36 [2023-12-20 07:34:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:16,032 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-20 07:34:16,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:34:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-20 07:34:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 07:34:16,033 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:16,033 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:16,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:16,236 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 [2023-12-20 07:34:16,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:16,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1956133820, now seen corresponding path program 2 times [2023-12-20 07:34:16,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:16,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615776747] [2023-12-20 07:34:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:16,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-20 07:34:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:16,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-20 07:34:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-12-20 07:34:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-20 07:34:16,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:16,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615776747] [2023-12-20 07:34:16,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615776747] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:16,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425564819] [2023-12-20 07:34:16,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:34:16,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:16,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:16,364 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) [2023-12-20 07:34:16,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 07:34:16,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:34:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:16,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 07:34:16,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 07:34:16,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-20 07:34:16,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425564819] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:16,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:16,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 14 [2023-12-20 07:34:16,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703603371] [2023-12-20 07:34:16,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:16,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 07:34:16,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:16,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 07:34:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:34:16,585 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 07:34:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:16,631 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2023-12-20 07:34:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 07:34:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2023-12-20 07:34:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:16,632 INFO L225 Difference]: With dead ends: 59 [2023-12-20 07:34:16,632 INFO L226 Difference]: Without dead ends: 36 [2023-12-20 07:34:16,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-20 07:34:16,635 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:16,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-20 07:34:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-20 07:34:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-12-20 07:34:16,648 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 48 [2023-12-20 07:34:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:16,648 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-12-20 07:34:16,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-20 07:34:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-12-20 07:34:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-20 07:34:16,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:16,651 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 6, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:16,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:16,860 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 [2023-12-20 07:34:16,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:16,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:16,861 INFO L85 PathProgramCache]: Analyzing trace with hash -538144458, now seen corresponding path program 3 times [2023-12-20 07:34:16,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:16,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355369213] [2023-12-20 07:34:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:16,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-20 07:34:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-12-20 07:34:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-12-20 07:34:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-20 07:34:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:17,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355369213] [2023-12-20 07:34:17,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355369213] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:17,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631356715] [2023-12-20 07:34:17,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:34:17,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:17,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:17,174 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) [2023-12-20 07:34:17,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 07:34:17,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 07:34:17,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:17,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 07:34:17,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 40 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-20 07:34:17,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-12-20 07:34:17,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631356715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:17,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:17,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-12-20 07:34:17,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908238142] [2023-12-20 07:34:17,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:17,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 07:34:17,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 07:34:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-12-20 07:34:17,361 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:17,399 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2023-12-20 07:34:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 07:34:17,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2023-12-20 07:34:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:17,400 INFO L225 Difference]: With dead ends: 65 [2023-12-20 07:34:17,401 INFO L226 Difference]: Without dead ends: 41 [2023-12-20 07:34:17,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-12-20 07:34:17,402 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:17,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-20 07:34:17,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-20 07:34:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-12-20 07:34:17,407 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 55 [2023-12-20 07:34:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:17,407 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-12-20 07:34:17,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-12-20 07:34:17,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 07:34:17,408 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:17,408 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:17,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:17,614 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 [2023-12-20 07:34:17,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:17,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1112987572, now seen corresponding path program 4 times [2023-12-20 07:34:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391410783] [2023-12-20 07:34:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-12-20 07:34:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-12-20 07:34:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-12-20 07:34:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-20 07:34:17,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:17,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391410783] [2023-12-20 07:34:17,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391410783] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:17,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635957508] [2023-12-20 07:34:17,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:34:17,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:17,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:17,929 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) [2023-12-20 07:34:17,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 07:34:18,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:34:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:18,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-20 07:34:18,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 57 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-20 07:34:18,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-12-20 07:34:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635957508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:18,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2023-12-20 07:34:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765227122] [2023-12-20 07:34:18,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 07:34:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 07:34:18,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-12-20 07:34:18,160 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:18,217 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-12-20 07:34:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-20 07:34:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2023-12-20 07:34:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:18,219 INFO L225 Difference]: With dead ends: 82 [2023-12-20 07:34:18,219 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 07:34:18,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-12-20 07:34:18,223 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:18,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 07:34:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-20 07:34:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2023-12-20 07:34:18,240 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 60 [2023-12-20 07:34:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:18,240 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2023-12-20 07:34:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2023-12-20 07:34:18,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-20 07:34:18,245 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:18,245 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 12, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:18,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:18,450 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 [2023-12-20 07:34:18,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:18,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash -424769866, now seen corresponding path program 5 times [2023-12-20 07:34:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963238148] [2023-12-20 07:34:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:18,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-12-20 07:34:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:18,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-12-20 07:34:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-20 07:34:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2023-12-20 07:34:18,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963238148] [2023-12-20 07:34:18,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963238148] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:18,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273835498] [2023-12-20 07:34:18,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 07:34:18,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:18,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:18,861 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) [2023-12-20 07:34:18,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 07:34:19,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-20 07:34:19,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:19,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:34:19,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2023-12-20 07:34:19,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-12-20 07:34:19,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273835498] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:19,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:19,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2023-12-20 07:34:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434906029] [2023-12-20 07:34:19,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:19,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 07:34:19,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 07:34:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-20 07:34:19,647 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:19,715 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2023-12-20 07:34:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-20 07:34:19,716 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 97 [2023-12-20 07:34:19,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:19,717 INFO L225 Difference]: With dead ends: 119 [2023-12-20 07:34:19,717 INFO L226 Difference]: Without dead ends: 79 [2023-12-20 07:34:19,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2023-12-20 07:34:19,719 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:19,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 111 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-20 07:34:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-20 07:34:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2023-12-20 07:34:19,739 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 97 [2023-12-20 07:34:19,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:19,739 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2023-12-20 07:34:19,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:19,739 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2023-12-20 07:34:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-20 07:34:19,745 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:19,745 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 13, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:19,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-20 07:34:19,952 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 [2023-12-20 07:34:19,953 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:19,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1752967244, now seen corresponding path program 6 times [2023-12-20 07:34:19,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:19,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518838268] [2023-12-20 07:34:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:20,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-12-20 07:34:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:20,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-12-20 07:34:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2023-12-20 07:34:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 2742 trivial. 0 not checked. [2023-12-20 07:34:20,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:20,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518838268] [2023-12-20 07:34:20,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518838268] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:20,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838138269] [2023-12-20 07:34:20,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 07:34:20,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:20,546 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) [2023-12-20 07:34:20,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 07:34:20,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-20 07:34:20,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:20,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 07:34:20,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 1240 proven. 21 refuted. 0 times theorem prover too weak. 1572 trivial. 0 not checked. [2023-12-20 07:34:20,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2833 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2023-12-20 07:34:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838138269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:21,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2023-12-20 07:34:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085611990] [2023-12-20 07:34:21,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:21,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-20 07:34:21,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-20 07:34:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-12-20 07:34:21,120 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:21,177 INFO L93 Difference]: Finished difference Result 152 states and 196 transitions. [2023-12-20 07:34:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-20 07:34:21,177 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 170 [2023-12-20 07:34:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:21,178 INFO L225 Difference]: With dead ends: 152 [2023-12-20 07:34:21,178 INFO L226 Difference]: Without dead ends: 88 [2023-12-20 07:34:21,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2023-12-20 07:34:21,180 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 223 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 [2023-12-20 07:34:21,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 223 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-20 07:34:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-20 07:34:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2048192771084338) internal successors, (100), 83 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2023-12-20 07:34:21,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 170 [2023-12-20 07:34:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:21,194 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2023-12-20 07:34:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-20 07:34:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2023-12-20 07:34:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-12-20 07:34:21,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:21,196 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 14, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:21,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:21,404 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 [2023-12-20 07:34:21,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:21,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash -679588106, now seen corresponding path program 7 times [2023-12-20 07:34:21,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:21,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610330512] [2023-12-20 07:34:21,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:21,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:22,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-12-20 07:34:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-12-20 07:34:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:22,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2023-12-20 07:34:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-12-20 07:34:22,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:22,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610330512] [2023-12-20 07:34:22,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610330512] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:22,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047139477] [2023-12-20 07:34:22,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 07:34:22,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:22,090 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) [2023-12-20 07:34:22,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 07:34:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:22,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 07:34:22,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-12-20 07:34:22,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:22,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 2826 trivial. 0 not checked. [2023-12-20 07:34:22,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047139477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:22,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:22,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 23 [2023-12-20 07:34:22,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621974339] [2023-12-20 07:34:22,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 07:34:22,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 07:34:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-12-20 07:34:22,601 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:34:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:22,639 INFO L93 Difference]: Finished difference Result 166 states and 207 transitions. [2023-12-20 07:34:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 07:34:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 179 [2023-12-20 07:34:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:22,640 INFO L225 Difference]: With dead ends: 166 [2023-12-20 07:34:22,640 INFO L226 Difference]: Without dead ends: 94 [2023-12-20 07:34:22,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 347 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-12-20 07:34:22,641 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:22,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 116 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-20 07:34:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-12-20 07:34:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2023-12-20 07:34:22,646 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 179 [2023-12-20 07:34:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:22,646 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2023-12-20 07:34:22,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-20 07:34:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2023-12-20 07:34:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-12-20 07:34:22,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:22,648 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 20, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:22,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:22,855 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 [2023-12-20 07:34:22,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash 770938678, now seen corresponding path program 8 times [2023-12-20 07:34:22,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:22,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119708705] [2023-12-20 07:34:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:22,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:23,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 07:34:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:23,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-12-20 07:34:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2023-12-20 07:34:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2023-12-20 07:34:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119708705] [2023-12-20 07:34:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119708705] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962093354] [2023-12-20 07:34:23,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:34:23,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:23,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:23,674 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) [2023-12-20 07:34:23,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 07:34:23,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:34:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:23,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 07:34:23,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 1236 proven. 287 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2023-12-20 07:34:23,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3036 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 1511 trivial. 0 not checked. [2023-12-20 07:34:24,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962093354] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:24,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:24,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-12-20 07:34:24,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387867912] [2023-12-20 07:34:24,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:24,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 07:34:24,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:24,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 07:34:24,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-12-20 07:34:24,219 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:34:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:24,278 INFO L93 Difference]: Finished difference Result 182 states and 231 transitions. [2023-12-20 07:34:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 07:34:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 185 [2023-12-20 07:34:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:24,280 INFO L225 Difference]: With dead ends: 182 [2023-12-20 07:34:24,280 INFO L226 Difference]: Without dead ends: 112 [2023-12-20 07:34:24,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 361 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-12-20 07:34:24,281 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:24,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 87 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-20 07:34:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-12-20 07:34:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 107 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2023-12-20 07:34:24,286 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 185 [2023-12-20 07:34:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:24,286 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2023-12-20 07:34:24,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 22 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-20 07:34:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2023-12-20 07:34:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-12-20 07:34:24,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:24,288 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:24,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:24,495 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 [2023-12-20 07:34:24,495 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:24,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1636113130, now seen corresponding path program 9 times [2023-12-20 07:34:24,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:24,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113400574] [2023-12-20 07:34:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:24,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:25,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 07:34:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:25,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 07:34:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2023-12-20 07:34:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5817 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5712 trivial. 0 not checked. [2023-12-20 07:34:25,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113400574] [2023-12-20 07:34:25,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113400574] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:25,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445389159] [2023-12-20 07:34:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:34:25,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:25,219 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) [2023-12-20 07:34:25,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 07:34:27,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-20 07:34:27,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:27,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 07:34:27,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5817 backedges. 2488 proven. 105 refuted. 0 times theorem prover too weak. 3224 trivial. 0 not checked. [2023-12-20 07:34:27,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5817 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 5712 trivial. 0 not checked. [2023-12-20 07:34:27,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445389159] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:27,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:27,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2023-12-20 07:34:27,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946148958] [2023-12-20 07:34:27,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:27,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 07:34:27,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:27,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 07:34:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-12-20 07:34:27,502 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:34:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:27,543 INFO L93 Difference]: Finished difference Result 187 states and 236 transitions. [2023-12-20 07:34:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 07:34:27,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 239 [2023-12-20 07:34:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:27,545 INFO L225 Difference]: With dead ends: 187 [2023-12-20 07:34:27,545 INFO L226 Difference]: Without dead ends: 117 [2023-12-20 07:34:27,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 468 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2023-12-20 07:34:27,546 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:27,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 07:34:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-20 07:34:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-20 07:34:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 112 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-20 07:34:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2023-12-20 07:34:27,551 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 239 [2023-12-20 07:34:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:27,551 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2023-12-20 07:34:27,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 07:34:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2023-12-20 07:34:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-12-20 07:34:27,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:27,554 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:27,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:27,768 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 [2023-12-20 07:34:27,768 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:27,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2097203812, now seen corresponding path program 10 times [2023-12-20 07:34:27,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:27,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459146644] [2023-12-20 07:34:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:27,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:35,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 07:34:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:36,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 07:34:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:36,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-12-20 07:34:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 116 proven. 5423 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2023-12-20 07:34:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459146644] [2023-12-20 07:34:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459146644] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464977130] [2023-12-20 07:34:38,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 07:34:38,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:38,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:38,626 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) [2023-12-20 07:34:38,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 07:34:38,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 07:34:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:34:38,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 307 conjunts are in the unsatisfiable core [2023-12-20 07:34:39,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:34:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2023-12-20 07:34:41,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:34:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 0 proven. 5310 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2023-12-20 07:34:44,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464977130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:34:44,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:34:44,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 70, 30] total 132 [2023-12-20 07:34:44,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916982582] [2023-12-20 07:34:44,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:34:44,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2023-12-20 07:34:44,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:34:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2023-12-20 07:34:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=16836, Unknown=0, NotChecked=0, Total=17292 [2023-12-20 07:34:44,592 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 132 states, 128 states have (on average 2.1796875) internal successors, (279), 126 states have internal predecessors, (279), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-20 07:34:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:34:52,040 INFO L93 Difference]: Finished difference Result 791 states and 1198 transitions. [2023-12-20 07:34:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-12-20 07:34:52,048 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 128 states have (on average 2.1796875) internal successors, (279), 126 states have internal predecessors, (279), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 244 [2023-12-20 07:34:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:34:52,059 INFO L225 Difference]: With dead ends: 791 [2023-12-20 07:34:52,059 INFO L226 Difference]: Without dead ends: 787 [2023-12-20 07:34:52,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8450 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=643, Invalid=25439, Unknown=0, NotChecked=0, Total=26082 [2023-12-20 07:34:52,067 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 132 mSDsluCounter, 5070 mSDsCounter, 0 mSdLazyCounter, 15532 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 5157 SdHoareTripleChecker+Invalid, 15627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 15532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-20 07:34:52,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 5157 Invalid, 15627 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [95 Valid, 15532 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-12-20 07:34:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2023-12-20 07:34:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 524. [2023-12-20 07:34:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 516 states have (on average 1.319767441860465) internal successors, (681), 517 states have internal predecessors, (681), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:34:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 695 transitions. [2023-12-20 07:34:52,168 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 695 transitions. Word has length 244 [2023-12-20 07:34:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:34:52,168 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 695 transitions. [2023-12-20 07:34:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 128 states have (on average 2.1796875) internal successors, (279), 126 states have internal predecessors, (279), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-20 07:34:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 695 transitions. [2023-12-20 07:34:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-12-20 07:34:52,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:34:52,173 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:34:52,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 07:34:52,383 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 [2023-12-20 07:34:52,384 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:34:52,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:34:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1388416858, now seen corresponding path program 1 times [2023-12-20 07:34:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:34:52,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296027583] [2023-12-20 07:34:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:52,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:34:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:57,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 07:34:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:58,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 07:34:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:58,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-12-20 07:34:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 1244 proven. 3447 refuted. 0 times theorem prover too weak. 1211 trivial. 0 not checked. [2023-12-20 07:34:59,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:34:59,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296027583] [2023-12-20 07:34:59,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296027583] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:34:59,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667355402] [2023-12-20 07:34:59,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:34:59,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:34:59,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:34:59,532 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) [2023-12-20 07:34:59,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 07:34:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:34:59,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-20 07:34:59,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:35:00,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 07:35:00,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 07:35:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2489 proven. 1871 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2023-12-20 07:35:02,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:35:04,829 INFO L349 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-12-20 07:35:04,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-12-20 07:35:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 2544 proven. 1814 refuted. 0 times theorem prover too weak. 1544 trivial. 0 not checked. [2023-12-20 07:35:04,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667355402] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:35:04,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:35:04,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 32, 30] total 106 [2023-12-20 07:35:04,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651106203] [2023-12-20 07:35:04,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:35:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-12-20 07:35:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:35:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-12-20 07:35:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=10753, Unknown=0, NotChecked=0, Total=11130 [2023-12-20 07:35:04,917 INFO L87 Difference]: Start difference. First operand 524 states and 695 transitions. Second operand has 106 states, 104 states have (on average 2.5) internal successors, (260), 103 states have internal predecessors, (260), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:35:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:35:23,028 INFO L93 Difference]: Finished difference Result 3408 states and 4731 transitions. [2023-12-20 07:35:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 284 states. [2023-12-20 07:35:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 104 states have (on average 2.5) internal successors, (260), 103 states have internal predecessors, (260), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 244 [2023-12-20 07:35:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:35:23,042 INFO L225 Difference]: With dead ends: 3408 [2023-12-20 07:35:23,042 INFO L226 Difference]: Without dead ends: 2762 [2023-12-20 07:35:23,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 911 GetRequests, 593 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30783 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=3200, Invalid=98242, Unknown=0, NotChecked=0, Total=101442 [2023-12-20 07:35:23,054 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 748 mSDsluCounter, 5582 mSDsCounter, 0 mSdLazyCounter, 10521 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 5704 SdHoareTripleChecker+Invalid, 10620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 10521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-20 07:35:23,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 5704 Invalid, 10620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 10521 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-12-20 07:35:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2023-12-20 07:35:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1962. [2023-12-20 07:35:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1940 states have (on average 1.3489690721649485) internal successors, (2617), 1946 states have internal predecessors, (2617), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (45), 10 states have call predecessors, (45), 10 states have call successors, (45) [2023-12-20 07:35:23,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2672 transitions. [2023-12-20 07:35:23,286 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2672 transitions. Word has length 244 [2023-12-20 07:35:23,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:35:23,287 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2672 transitions. [2023-12-20 07:35:23,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 104 states have (on average 2.5) internal successors, (260), 103 states have internal predecessors, (260), 5 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-20 07:35:23,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2672 transitions. [2023-12-20 07:35:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-12-20 07:35:23,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:35:23,300 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:35:23,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 07:35:23,513 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 [2023-12-20 07:35:23,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:35:23,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:35:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1396139234, now seen corresponding path program 2 times [2023-12-20 07:35:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:35:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265339784] [2023-12-20 07:35:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:35:23,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:35:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:35:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 07:35:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:35:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 07:35:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:35:33,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-12-20 07:35:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:35:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 1243 proven. 4012 refuted. 0 times theorem prover too weak. 647 trivial. 0 not checked. [2023-12-20 07:35:34,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:35:34,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265339784] [2023-12-20 07:35:34,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265339784] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:35:34,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520477440] [2023-12-20 07:35:34,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 07:35:34,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:35:34,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:35:34,777 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) [2023-12-20 07:35:34,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 07:35:35,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 07:35:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:35:35,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 225 conjunts are in the unsatisfiable core [2023-12-20 07:35:35,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:35:35,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 07:35:35,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:35,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2023-12-20 07:35:35,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:35,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-12-20 07:35:35,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:35,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:35,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:35,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,059 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,424 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,706 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:36,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:36,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:37,027 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:37,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:37,208 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:37,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:37,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:35:37,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2023-12-20 07:35:37,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:35:37,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 18 [2023-12-20 07:35:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 57 proven. 5253 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2023-12-20 07:35:39,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 07:35:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 1375 proven. 3722 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2023-12-20 07:35:49,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520477440] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 07:35:49,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 07:35:49,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 90, 66] total 179 [2023-12-20 07:35:49,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881105679] [2023-12-20 07:35:49,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 07:35:49,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2023-12-20 07:35:49,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 07:35:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2023-12-20 07:35:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1123, Invalid=30739, Unknown=0, NotChecked=0, Total=31862 [2023-12-20 07:35:49,341 INFO L87 Difference]: Start difference. First operand 1962 states and 2672 transitions. Second operand has 179 states, 179 states have (on average 2.0726256983240225) internal successors, (371), 178 states have internal predecessors, (371), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-20 07:36:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 07:36:09,336 INFO L93 Difference]: Finished difference Result 8322 states and 11670 transitions. [2023-12-20 07:36:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2023-12-20 07:36:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 2.0726256983240225) internal successors, (371), 178 states have internal predecessors, (371), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) Word has length 244 [2023-12-20 07:36:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 07:36:09,365 INFO L225 Difference]: With dead ends: 8322 [2023-12-20 07:36:09,365 INFO L226 Difference]: Without dead ends: 6346 [2023-12-20 07:36:09,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 430 SyntacticMatches, 2 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13362 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=2724, Invalid=49032, Unknown=0, NotChecked=0, Total=51756 [2023-12-20 07:36:09,375 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 249 mSDsluCounter, 10375 mSDsCounter, 0 mSdLazyCounter, 19889 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 10508 SdHoareTripleChecker+Invalid, 19927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 19889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-12-20 07:36:09,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 10508 Invalid, 19927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 19889 Invalid, 0 Unknown, 0 Unchecked, 14.7s Time] [2023-12-20 07:36:09,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6346 states. [2023-12-20 07:36:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6346 to 3824. [2023-12-20 07:36:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3824 states, 3776 states have (on average 1.3559322033898304) internal successors, (5120), 3793 states have internal predecessors, (5120), 19 states have call successors, (19), 11 states have call predecessors, (19), 28 states have return successors, (109), 19 states have call predecessors, (109), 19 states have call successors, (109) [2023-12-20 07:36:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3824 states to 3824 states and 5248 transitions. [2023-12-20 07:36:09,804 INFO L78 Accepts]: Start accepts. Automaton has 3824 states and 5248 transitions. Word has length 244 [2023-12-20 07:36:09,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 07:36:09,804 INFO L495 AbstractCegarLoop]: Abstraction has 3824 states and 5248 transitions. [2023-12-20 07:36:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 2.0726256983240225) internal successors, (371), 178 states have internal predecessors, (371), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 3 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-20 07:36:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3824 states and 5248 transitions. [2023-12-20 07:36:09,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-12-20 07:36:09,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 07:36:09,827 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 20, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 07:36:09,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 07:36:10,040 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 [2023-12-20 07:36:10,040 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 07:36:10,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 07:36:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1186646234, now seen corresponding path program 3 times [2023-12-20 07:36:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 07:36:10,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976512215] [2023-12-20 07:36:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 07:36:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 07:36:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:36:18,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-12-20 07:36:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:36:19,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-12-20 07:36:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:36:19,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2023-12-20 07:36:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 07:36:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5902 backedges. 1243 proven. 4014 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2023-12-20 07:36:19,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 07:36:19,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976512215] [2023-12-20 07:36:19,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976512215] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 07:36:19,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605771098] [2023-12-20 07:36:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 07:36:19,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 07:36:19,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 07:36:19,992 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) [2023-12-20 07:36:19,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 07:36:33,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-12-20 07:36:33,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 07:36:33,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 171 conjunts are in the unsatisfiable core [2023-12-20 07:36:33,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 07:36:33,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 07:36:33,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 07:36:33,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2023-12-20 07:36:33,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:36:33,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-12-20 07:36:33,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 07:36:33,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 39 [2023-12-20 07:36:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:36:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 07:36:34,050 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-12-20 07:36:34,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 48 treesize of output 56 [2023-12-20 07:36:34,349 INFO L349 Elim1Store]: treesize reduction 150, result has 44.2 percent of original size [2023-12-20 07:36:34,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 90 treesize of output 169 [2023-12-20 07:36:35,394 INFO L349 Elim1Store]: treesize reduction 170, result has 46.2 percent of original size [2023-12-20 07:36:35,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 105 treesize of output 203 [2023-12-20 07:36:48,786 WARN L293 SmtUtils]: Spent 11.70s on a formula simplification. DAG size of input: 1084 DAG size of output: 874 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-20 07:36:48,787 INFO L349 Elim1Store]: treesize reduction 688, result has 75.7 percent of original size [2023-12-20 07:36:48,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 24 select indices, 24 select index equivalence classes, 16 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 299 case distinctions, treesize of input 365 treesize of output 2307 [2023-12-20 07:40:29,959 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 101 [2023-12-20 07:40:29,960 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-20 07:40:29,961 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-12-20 07:40:29,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 07:40:30,161 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 [2023-12-20 07:40:30,162 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:298) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2023-12-20 07:40:30,165 INFO L158 Benchmark]: Toolchain (without parser) took 376691.67ms. Allocated memory was 205.5MB in the beginning and 984.6MB in the end (delta: 779.1MB). Free memory was 159.9MB in the beginning and 520.8MB in the end (delta: -360.9MB). Peak memory consumption was 652.4MB. Max. memory is 8.0GB. [2023-12-20 07:40:30,165 INFO L158 Benchmark]: CDTParser took 0.51ms. Allocated memory is still 205.5MB. Free memory is still 162.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 07:40:30,166 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.08ms. Allocated memory is still 205.5MB. Free memory was 159.9MB in the beginning and 148.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 07:40:30,166 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.67ms. Allocated memory is still 205.5MB. Free memory was 148.7MB in the beginning and 147.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 07:40:30,167 INFO L158 Benchmark]: Boogie Preprocessor took 31.04ms. Allocated memory is still 205.5MB. Free memory was 147.0MB in the beginning and 144.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 07:40:30,167 INFO L158 Benchmark]: RCFGBuilder took 292.81ms. Allocated memory is still 205.5MB. Free memory was 144.9MB in the beginning and 132.0MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 07:40:30,168 INFO L158 Benchmark]: TraceAbstraction took 376148.25ms. Allocated memory was 205.5MB in the beginning and 984.6MB in the end (delta: 779.1MB). Free memory was 131.3MB in the beginning and 520.8MB in the end (delta: -389.5MB). Peak memory consumption was 624.1MB. Max. memory is 8.0GB. [2023-12-20 07:40:30,169 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51ms. Allocated memory is still 205.5MB. Free memory is still 162.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 188.08ms. Allocated memory is still 205.5MB. Free memory was 159.9MB in the beginning and 148.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.67ms. Allocated memory is still 205.5MB. Free memory was 148.7MB in the beginning and 147.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.04ms. Allocated memory is still 205.5MB. Free memory was 147.0MB in the beginning and 144.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 292.81ms. Allocated memory is still 205.5MB. Free memory was 144.9MB in the beginning and 132.0MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 376148.25ms. Allocated memory was 205.5MB in the beginning and 984.6MB in the end (delta: 779.1MB). Free memory was 131.3MB in the beginning and 520.8MB in the end (delta: -389.5MB). Peak memory consumption was 624.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...