/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 17:13:49,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 17:13:49,634 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 17:13:49,637 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 17:13:49,638 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 17:13:49,650 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 17:13:49,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 17:13:49,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 17:13:49,651 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 17:13:49,651 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 17:13:49,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 17:13:49,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 17:13:49,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 17:13:49,652 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 17:13:49,653 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 17:13:49,653 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 17:13:49,653 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 17:13:49,653 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 17:13:49,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 17:13:49,654 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 17:13:49,654 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 17:13:49,654 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 17:13:49,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 17:13:49,655 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 17:13:49,655 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 17:13:49,655 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 17:13:49,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 17:13:49,656 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 17:13:49,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 17:13:49,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 17:13:49,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 17:13:49,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 17:13:49,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:13:49,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 17:13:49,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 17:13:49,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 17:13:49,658 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 17:13:49,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 17:13:49,658 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 17:13:49,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 17:13:49,658 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 17:13:49,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 17:13:49,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 17:13:49,660 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 17:13:49,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 17:13:49,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 17:13:49,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 17:13:49,837 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 17:13:49,837 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 17:13:49,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2023-12-15 17:13:50,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 17:13:51,086 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 17:13:51,087 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c [2023-12-15 17:13:51,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cacf7d455/3071cbd672764d7eb92f83f5f870c225/FLAGe292d77ee [2023-12-15 17:13:51,107 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cacf7d455/3071cbd672764d7eb92f83f5f870c225 [2023-12-15 17:13:51,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 17:13:51,110 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 17:13:51,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 17:13:51,111 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 17:13:51,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 17:13:51,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54e2891c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51, skipping insertion in model container [2023-12-15 17:13:51,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,133 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 17:13:51,257 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c[402,415] [2023-12-15 17:13:51,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:13:51,283 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 17:13:51,290 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m4.c[402,415] [2023-12-15 17:13:51,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 17:13:51,319 INFO L206 MainTranslator]: Completed translation [2023-12-15 17:13:51,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51 WrapperNode [2023-12-15 17:13:51,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 17:13:51,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 17:13:51,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 17:13:51,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 17:13:51,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,358 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 130 [2023-12-15 17:13:51,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 17:13:51,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 17:13:51,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 17:13:51,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 17:13:51,366 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,386 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2023-12-15 17:13:51,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,395 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,399 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 17:13:51,401 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 17:13:51,401 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 17:13:51,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 17:13:51,402 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (1/1) ... [2023-12-15 17:13:51,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 17:13:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:51,422 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) [2023-12-15 17:13:51,442 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 [2023-12-15 17:13:51,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 17:13:51,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-15 17:13:51,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-15 17:13:51,523 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 17:13:51,524 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 17:13:51,670 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 17:13:51,697 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 17:13:51,697 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-15 17:13:51,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:13:51 BoogieIcfgContainer [2023-12-15 17:13:51,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 17:13:51,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 17:13:51,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 17:13:51,701 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 17:13:51,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 05:13:51" (1/3) ... [2023-12-15 17:13:51,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363c3478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:13:51, skipping insertion in model container [2023-12-15 17:13:51,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 05:13:51" (2/3) ... [2023-12-15 17:13:51,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363c3478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 05:13:51, skipping insertion in model container [2023-12-15 17:13:51,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 05:13:51" (3/3) ... [2023-12-15 17:13:51,703 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2023-12-15 17:13:51,715 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 17:13:51,716 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 17:13:51,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 17:13:51,752 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;@38651a2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 17:13:51,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 17:13:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:51,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 17:13:51,763 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:51,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:51,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:51,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1145627675, now seen corresponding path program 1 times [2023-12-15 17:13:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:51,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743263293] [2023-12-15 17:13:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:51,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:51,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743263293] [2023-12-15 17:13:51,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743263293] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:13:51,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:13:51,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-15 17:13:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935635972] [2023-12-15 17:13:51,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:13:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-15 17:13:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-15 17:13:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:13:51,964 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:51,990 INFO L93 Difference]: Finished difference Result 49 states and 84 transitions. [2023-12-15 17:13:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-15 17:13:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-15 17:13:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:52,003 INFO L225 Difference]: With dead ends: 49 [2023-12-15 17:13:52,003 INFO L226 Difference]: Without dead ends: 23 [2023-12-15 17:13:52,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-15 17:13:52,008 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 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 [2023-12-15 17:13:52,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-15 17:13:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-15 17:13:52,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2023-12-15 17:13:52,029 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 22 [2023-12-15 17:13:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:52,030 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2023-12-15 17:13:52,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2023-12-15 17:13:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-15 17:13:52,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:52,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-15 17:13:52,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:52,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:52,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1559691955, now seen corresponding path program 1 times [2023-12-15 17:13:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581565490] [2023-12-15 17:13:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:52,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:52,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581565490] [2023-12-15 17:13:52,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581565490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:13:52,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:13:52,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 17:13:52,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008846400] [2023-12-15 17:13:52,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:13:52,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-15 17:13:52,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-15 17:13:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 17:13:52,125 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:52,156 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2023-12-15 17:13:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 17:13:52,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-15 17:13:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:52,157 INFO L225 Difference]: With dead ends: 44 [2023-12-15 17:13:52,157 INFO L226 Difference]: Without dead ends: 24 [2023-12-15 17:13:52,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-15 17:13:52,158 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:52,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-15 17:13:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-15 17:13:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-12-15 17:13:52,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 22 [2023-12-15 17:13:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:52,170 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-12-15 17:13:52,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-12-15 17:13:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-15 17:13:52,171 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:52,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-15 17:13:52,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:52,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 292225116, now seen corresponding path program 1 times [2023-12-15 17:13:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103584466] [2023-12-15 17:13:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-15 17:13:52,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:52,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103584466] [2023-12-15 17:13:52,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103584466] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 17:13:52,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 17:13:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 17:13:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244886637] [2023-12-15 17:13:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 17:13:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 17:13:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 17:13:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 17:13:52,237 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:52,310 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2023-12-15 17:13:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:13:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-15 17:13:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:52,314 INFO L225 Difference]: With dead ends: 50 [2023-12-15 17:13:52,314 INFO L226 Difference]: Without dead ends: 32 [2023-12-15 17:13:52,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 17:13:52,319 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:52,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 15 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-15 17:13:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-15 17:13:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-12-15 17:13:52,329 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2023-12-15 17:13:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:52,329 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-12-15 17:13:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,329 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-12-15 17:13:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-15 17:13:52,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:52,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-15 17:13:52,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:52,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash -571287103, now seen corresponding path program 1 times [2023-12-15 17:13:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:52,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747293680] [2023-12-15 17:13:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:52,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 17:13:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:52,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747293680] [2023-12-15 17:13:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747293680] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:52,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485894879] [2023-12-15 17:13:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:52,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:52,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:52,493 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) [2023-12-15 17:13:52,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 17:13:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:52,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:13:52,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 17:13:52,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-15 17:13:52,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485894879] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:52,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:52,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-15 17:13:52,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016479336] [2023-12-15 17:13:52,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 17:13:52,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 17:13:52,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:13:52,657 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:52,703 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-12-15 17:13:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 17:13:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-15 17:13:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:52,705 INFO L225 Difference]: With dead ends: 61 [2023-12-15 17:13:52,705 INFO L226 Difference]: Without dead ends: 33 [2023-12-15 17:13:52,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-12-15 17:13:52,711 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:52,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 17:13:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-15 17:13:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-12-15 17:13:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-12-15 17:13:52,715 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 31 [2023-12-15 17:13:52,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:52,715 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-12-15 17:13:52,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-12-15 17:13:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-15 17:13:52,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:52,716 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:52,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:52,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:52,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:52,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:52,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1411852856, now seen corresponding path program 2 times [2023-12-15 17:13:52,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:52,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275174147] [2023-12-15 17:13:52,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:52,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:13:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275174147] [2023-12-15 17:13:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275174147] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:53,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633538644] [2023-12-15 17:13:53,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:13:53,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:53,049 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) [2023-12-15 17:13:53,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 17:13:53,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:13:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:53,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-15 17:13:53,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:13:53,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-15 17:13:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633538644] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:53,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:53,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-12-15 17:13:53,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717211049] [2023-12-15 17:13:53,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:53,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-15 17:13:53,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:53,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-15 17:13:53,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 17:13:53,217 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:53,283 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-12-15 17:13:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-15 17:13:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-12-15 17:13:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:53,284 INFO L225 Difference]: With dead ends: 66 [2023-12-15 17:13:53,284 INFO L226 Difference]: Without dead ends: 41 [2023-12-15 17:13:53,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-12-15 17:13:53,285 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:53,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-15 17:13:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-15 17:13:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-12-15 17:13:53,289 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2023-12-15 17:13:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:53,289 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-12-15 17:13:53,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-12-15 17:13:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-15 17:13:53,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:53,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:53,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:53,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:53,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:53,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:53,495 INFO L85 PathProgramCache]: Analyzing trace with hash -983377741, now seen corresponding path program 3 times [2023-12-15 17:13:53,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:53,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050404844] [2023-12-15 17:13:53,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:53,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:55,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050404844] [2023-12-15 17:13:55,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050404844] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92462546] [2023-12-15 17:13:55,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:13:55,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:55,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:55,540 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) [2023-12-15 17:13:55,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 17:13:55,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-15 17:13:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:55,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 80 conjunts are in the unsatisfiable core [2023-12-15 17:13:55,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:55,645 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 [2023-12-15 17:13:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:13:55,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-15 17:13:56,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92462546] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:56,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:56,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 45 [2023-12-15 17:13:56,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003543680] [2023-12-15 17:13:56,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:56,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-15 17:13:56,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:56,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-15 17:13:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2023-12-15 17:13:56,570 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:57,134 INFO L93 Difference]: Finished difference Result 74 states and 89 transitions. [2023-12-15 17:13:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-15 17:13:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-15 17:13:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:57,138 INFO L225 Difference]: With dead ends: 74 [2023-12-15 17:13:57,138 INFO L226 Difference]: Without dead ends: 70 [2023-12-15 17:13:57,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2023-12-15 17:13:57,139 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:57,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 242 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-15 17:13:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-15 17:13:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-12-15 17:13:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-12-15 17:13:57,156 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 40 [2023-12-15 17:13:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:57,156 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-12-15 17:13:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-12-15 17:13:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-15 17:13:57,157 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:57,157 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:57,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:57,376 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:57,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:57,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1490045062, now seen corresponding path program 4 times [2023-12-15 17:13:57,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:57,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659606629] [2023-12-15 17:13:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:57,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:13:57,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659606629] [2023-12-15 17:13:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659606629] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363067507] [2023-12-15 17:13:57,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:13:57,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:57,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:57,469 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) [2023-12-15 17:13:57,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 17:13:57,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:13:57,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:57,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:13:57,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:13:57,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-15 17:13:57,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363067507] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:57,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:57,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-12-15 17:13:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842339302] [2023-12-15 17:13:57,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-15 17:13:57,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-15 17:13:57,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:13:57,676 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:57,991 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2023-12-15 17:13:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-15 17:13:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-15 17:13:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:57,992 INFO L225 Difference]: With dead ends: 143 [2023-12-15 17:13:57,992 INFO L226 Difference]: Without dead ends: 78 [2023-12-15 17:13:57,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-12-15 17:13:57,993 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 97 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:57,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 91 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:13:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-15 17:13:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-12-15 17:13:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-12-15 17:13:58,015 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 41 [2023-12-15 17:13:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:58,015 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-12-15 17:13:58,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-12-15 17:13:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-15 17:13:58,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:58,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:58,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:58,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:58,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash -603402222, now seen corresponding path program 5 times [2023-12-15 17:13:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:58,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351363098] [2023-12-15 17:13:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:13:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-15 17:13:58,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:13:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351363098] [2023-12-15 17:13:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351363098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:13:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764012718] [2023-12-15 17:13:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:13:58,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:58,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:13:58,335 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) [2023-12-15 17:13:58,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 17:13:58,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-15 17:13:58,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:13:58,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-15 17:13:58,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:13:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-15 17:13:58,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:13:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-15 17:13:58,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764012718] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:13:58,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:13:58,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-12-15 17:13:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745227561] [2023-12-15 17:13:58,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:13:58,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-15 17:13:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:13:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-15 17:13:58,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-12-15 17:13:58,547 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:13:58,684 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2023-12-15 17:13:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-15 17:13:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-15 17:13:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:13:58,685 INFO L225 Difference]: With dead ends: 106 [2023-12-15 17:13:58,685 INFO L226 Difference]: Without dead ends: 50 [2023-12-15 17:13:58,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-12-15 17:13:58,686 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:13:58,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 65 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:13:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-15 17:13:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-15 17:13:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-12-15 17:13:58,690 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2023-12-15 17:13:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:13:58,690 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-12-15 17:13:58,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:13:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-12-15 17:13:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-15 17:13:58,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:13:58,691 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:13:58,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 17:13:58,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:13:58,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:13:58,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:13:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 394500289, now seen corresponding path program 6 times [2023-12-15 17:13:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:13:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727209826] [2023-12-15 17:13:58,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:13:58,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:13:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:14:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727209826] [2023-12-15 17:14:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727209826] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220309730] [2023-12-15 17:14:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:14:01,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:01,649 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) [2023-12-15 17:14:01,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 17:14:01,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-12-15 17:14:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:01,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 106 conjunts are in the unsatisfiable core [2023-12-15 17:14:01,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:14:02,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:14:04,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:14:04,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 89 [2023-12-15 17:14:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:14:04,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220309730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:14:04,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:14:04,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30, 32] total 89 [2023-12-15 17:14:04,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320107846] [2023-12-15 17:14:04,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:14:04,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-12-15 17:14:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:14:04,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-12-15 17:14:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=7539, Unknown=0, NotChecked=0, Total=7832 [2023-12-15 17:14:04,646 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 89 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:14:11,200 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2023-12-15 17:14:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-12-15 17:14:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-15 17:14:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:14:11,202 INFO L225 Difference]: With dead ends: 200 [2023-12-15 17:14:11,202 INFO L226 Difference]: Without dead ends: 194 [2023-12-15 17:14:11,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4672 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1070, Invalid=19522, Unknown=0, NotChecked=0, Total=20592 [2023-12-15 17:14:11,206 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 161 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 5957 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 6429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 5957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-15 17:14:11,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 499 Invalid, 6429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 5957 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-15 17:14:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-15 17:14:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2023-12-15 17:14:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2181818181818183) internal successors, (134), 110 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2023-12-15 17:14:11,224 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 49 [2023-12-15 17:14:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:14:11,224 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2023-12-15 17:14:11,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.4382022471910112) internal successors, (128), 89 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2023-12-15 17:14:11,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-15 17:14:11,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:14:11,225 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:14:11,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:11,426 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:14:11,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:14:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1106758621, now seen corresponding path program 7 times [2023-12-15 17:14:11,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:14:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510401054] [2023-12-15 17:14:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:14:11,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:14:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-15 17:14:11,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:11,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510401054] [2023-12-15 17:14:11,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510401054] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:11,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907255779] [2023-12-15 17:14:11,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-15 17:14:11,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:11,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:11,522 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) [2023-12-15 17:14:11,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 17:14:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:11,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:14:11,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-15 17:14:11,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:14:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-15 17:14:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907255779] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:14:11,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:14:11,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-15 17:14:11,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329474666] [2023-12-15 17:14:11,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:14:11,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 17:14:11,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:14:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 17:14:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:14:11,741 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:14:11,906 INFO L93 Difference]: Finished difference Result 188 states and 224 transitions. [2023-12-15 17:14:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 17:14:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-15 17:14:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:14:11,907 INFO L225 Difference]: With dead ends: 188 [2023-12-15 17:14:11,907 INFO L226 Difference]: Without dead ends: 85 [2023-12-15 17:14:11,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-12-15 17:14:11,909 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:14:11,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 49 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:14:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-15 17:14:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-15 17:14:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2023-12-15 17:14:11,929 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 50 [2023-12-15 17:14:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:14:11,929 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2023-12-15 17:14:11,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2023-12-15 17:14:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-15 17:14:11,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:14:11,932 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:14:11,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:12,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:12,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:14:12,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:14:12,137 INFO L85 PathProgramCache]: Analyzing trace with hash -567554037, now seen corresponding path program 8 times [2023-12-15 17:14:12,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:14:12,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172546201] [2023-12-15 17:14:12,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:14:12,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:14:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-15 17:14:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172546201] [2023-12-15 17:14:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172546201] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3408090] [2023-12-15 17:14:12,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-15 17:14:12,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:12,244 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) [2023-12-15 17:14:12,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-15 17:14:12,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-15 17:14:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:12,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-15 17:14:12,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-15 17:14:12,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:14:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-15 17:14:12,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3408090] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:14:12,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:14:12,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-15 17:14:12,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077061146] [2023-12-15 17:14:12,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:14:12,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-15 17:14:12,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:14:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-15 17:14:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-12-15 17:14:12,434 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:14:12,557 INFO L93 Difference]: Finished difference Result 127 states and 156 transitions. [2023-12-15 17:14:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-15 17:14:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-12-15 17:14:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:14:12,557 INFO L225 Difference]: With dead ends: 127 [2023-12-15 17:14:12,557 INFO L226 Difference]: Without dead ends: 59 [2023-12-15 17:14:12,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-12-15 17:14:12,558 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 17:14:12,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 70 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 17:14:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-15 17:14:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-15 17:14:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-12-15 17:14:12,570 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 51 [2023-12-15 17:14:12,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:14:12,570 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-12-15 17:14:12,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:12,570 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-12-15 17:14:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-15 17:14:12,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:14:12,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:14:12,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:12,774 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,SelfDestructingSolverStorable10 [2023-12-15 17:14:12,775 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:14:12,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:14:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1905328461, now seen corresponding path program 9 times [2023-12-15 17:14:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:14:12,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64166094] [2023-12-15 17:14:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:14:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:14:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:16,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:14:16,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:16,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64166094] [2023-12-15 17:14:16,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64166094] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:16,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131177128] [2023-12-15 17:14:16,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-15 17:14:16,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:16,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:16,356 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) [2023-12-15 17:14:16,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-15 17:14:16,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-15 17:14:16,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:16,427 WARN L260 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 151 conjunts are in the unsatisfiable core [2023-12-15 17:14:16,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:16,482 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 [2023-12-15 17:14:19,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:14:19,831 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 19 treesize of output 16 [2023-12-15 17:14:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:14:19,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:14:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-15 17:14:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131177128] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:14:24,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:14:24,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 47, 46] total 137 [2023-12-15 17:14:24,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729161525] [2023-12-15 17:14:24,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:14:24,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-12-15 17:14:24,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:14:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-12-15 17:14:24,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=18166, Unknown=0, NotChecked=0, Total=18632 [2023-12-15 17:14:24,735 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 137 states, 137 states have (on average 1.197080291970803) internal successors, (164), 137 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:14:43,240 INFO L93 Difference]: Finished difference Result 200 states and 233 transitions. [2023-12-15 17:14:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-12-15 17:14:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.197080291970803) internal successors, (164), 137 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-15 17:14:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:14:43,245 INFO L225 Difference]: With dead ends: 200 [2023-12-15 17:14:43,245 INFO L226 Difference]: Without dead ends: 194 [2023-12-15 17:14:43,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1985, Invalid=47520, Unknown=1, NotChecked=0, Total=49506 [2023-12-15 17:14:43,252 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 179 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 8693 mSolverCounterSat, 628 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 9323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 8693 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-15 17:14:43,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 739 Invalid, 9323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 8693 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2023-12-15 17:14:43,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-15 17:14:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 106. [2023-12-15 17:14:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.180952380952381) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2023-12-15 17:14:43,304 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2023-12-15 17:14:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:14:43,304 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2023-12-15 17:14:43,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.197080291970803) internal successors, (164), 137 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2023-12-15 17:14:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-15 17:14:43,305 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:14:43,305 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:14:43,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:43,509 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:14:43,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:14:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -968038111, now seen corresponding path program 10 times [2023-12-15 17:14:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:14:43,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269130008] [2023-12-15 17:14:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:14:43,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:14:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-15 17:14:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269130008] [2023-12-15 17:14:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269130008] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243063600] [2023-12-15 17:14:43,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-15 17:14:43,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:43,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:43,620 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) [2023-12-15 17:14:43,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-15 17:14:43,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-15 17:14:43,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:43,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:14:43,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-15 17:14:43,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:14:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-15 17:14:43,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243063600] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:14:43,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:14:43,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-15 17:14:43,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427366507] [2023-12-15 17:14:43,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:14:43,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 17:14:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:14:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 17:14:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-15 17:14:43,915 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:14:44,263 INFO L93 Difference]: Finished difference Result 235 states and 275 transitions. [2023-12-15 17:14:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-15 17:14:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-15 17:14:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:14:44,264 INFO L225 Difference]: With dead ends: 235 [2023-12-15 17:14:44,264 INFO L226 Difference]: Without dead ends: 103 [2023-12-15 17:14:44,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2023-12-15 17:14:44,264 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:14:44,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:14:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-12-15 17:14:44,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2023-12-15 17:14:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2023-12-15 17:14:44,293 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 59 [2023-12-15 17:14:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:14:44,293 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2023-12-15 17:14:44,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2023-12-15 17:14:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-15 17:14:44,294 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:14:44,294 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:14:44,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:44,498 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,SelfDestructingSolverStorable12 [2023-12-15 17:14:44,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:14:44,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:14:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1346722508, now seen corresponding path program 11 times [2023-12-15 17:14:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:14:44,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892738399] [2023-12-15 17:14:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:14:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:14:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-15 17:14:44,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:44,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892738399] [2023-12-15 17:14:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892738399] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:44,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665062322] [2023-12-15 17:14:44,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-15 17:14:44,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:44,621 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) [2023-12-15 17:14:44,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-15 17:14:44,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-15 17:14:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:44,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 17:14:44,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-15 17:14:44,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 17:14:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-15 17:14:44,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665062322] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-15 17:14:44,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-15 17:14:44,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2023-12-15 17:14:44,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663056220] [2023-12-15 17:14:44,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-15 17:14:44,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-15 17:14:44,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 17:14:44,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-15 17:14:44,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2023-12-15 17:14:44,916 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 17:14:45,202 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2023-12-15 17:14:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-15 17:14:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-15 17:14:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 17:14:45,203 INFO L225 Difference]: With dead ends: 90 [2023-12-15 17:14:45,203 INFO L226 Difference]: Without dead ends: 68 [2023-12-15 17:14:45,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2023-12-15 17:14:45,204 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-15 17:14:45,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 67 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-15 17:14:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-15 17:14:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-15 17:14:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-12-15 17:14:45,251 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 63 [2023-12-15 17:14:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 17:14:45,251 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-12-15 17:14:45,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-15 17:14:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-12-15 17:14:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-15 17:14:45,251 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 17:14:45,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 17:14:45,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:45,456 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,SelfDestructingSolverStorable13 [2023-12-15 17:14:45,456 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 17:14:45,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 17:14:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash 557647809, now seen corresponding path program 12 times [2023-12-15 17:14:45,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 17:14:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495819698] [2023-12-15 17:14:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 17:14:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 17:14:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 17:14:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:14:50,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 17:14:50,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495819698] [2023-12-15 17:14:50,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495819698] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 17:14:50,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219459816] [2023-12-15 17:14:50,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-15 17:14:50,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 17:14:50,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 17:14:50,526 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) [2023-12-15 17:14:50,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-15 17:14:50,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-15 17:14:50,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-15 17:14:50,645 WARN L260 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 191 conjunts are in the unsatisfiable core [2023-12-15 17:14:50,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 17:14:50,767 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 [2023-12-15 17:14:55,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-15 17:14:55,181 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 15 treesize of output 14 [2023-12-15 17:14:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-15 17:14:55,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2023-12-15 17:14:56,811 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:14:56,813 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 17:14:57,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-15 17:14:58,011 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-15 17:14:58,019 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 17:14:58,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-15 17:14:58,019 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while executing Executor. [2023-12-15 17:14:58,022 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1] [2023-12-15 17:14:58,024 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 17:14:58,035 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 137 [2023-12-15 17:14:58,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 05:14:58 BoogieIcfgContainer [2023-12-15 17:14:58,039 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 17:14:58,039 INFO L158 Benchmark]: Toolchain (without parser) took 66929.16ms. Allocated memory was 245.4MB in the beginning and 767.6MB in the end (delta: 522.2MB). Free memory was 199.2MB in the beginning and 659.8MB in the end (delta: -460.6MB). Peak memory consumption was 63.6MB. Max. memory is 8.0GB. [2023-12-15 17:14:58,039 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory was 130.6MB in the beginning and 130.4MB in the end (delta: 194.1kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 17:14:58,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.26ms. Allocated memory is still 245.4MB. Free memory was 199.2MB in the beginning and 187.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-15 17:14:58,040 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.77ms. Allocated memory is still 245.4MB. Free memory was 187.7MB in the beginning and 186.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:14:58,040 INFO L158 Benchmark]: Boogie Preprocessor took 42.06ms. Allocated memory is still 245.4MB. Free memory was 186.1MB in the beginning and 183.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-15 17:14:58,042 INFO L158 Benchmark]: RCFGBuilder took 296.49ms. Allocated memory is still 245.4MB. Free memory was 183.5MB in the beginning and 167.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-15 17:14:58,043 INFO L158 Benchmark]: TraceAbstraction took 66339.49ms. Allocated memory was 245.4MB in the beginning and 767.6MB in the end (delta: 522.2MB). Free memory was 166.7MB in the beginning and 659.8MB in the end (delta: -493.1MB). Peak memory consumption was 31.1MB. Max. memory is 8.0GB. [2023-12-15 17:14:58,048 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory was 130.6MB in the beginning and 130.4MB in the end (delta: 194.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.26ms. Allocated memory is still 245.4MB. Free memory was 199.2MB in the beginning and 187.7MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 37.77ms. Allocated memory is still 245.4MB. Free memory was 187.7MB in the beginning and 186.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.06ms. Allocated memory is still 245.4MB. Free memory was 186.1MB in the beginning and 183.5MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 296.49ms. Allocated memory is still 245.4MB. Free memory was 183.5MB in the beginning and 167.2MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 66339.49ms. Allocated memory was 245.4MB in the beginning and 767.6MB in the end (delta: 522.2MB). Free memory was 166.7MB in the beginning and 659.8MB in the end (delta: -493.1MB). Peak memory consumption was 31.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was analyzing trace of length 68 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 66.3s, OverallIterations: 15, TraceHistogramMax: 5, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 701 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 701 mSDsluCounter, 2009 SdHoareTripleChecker+Invalid, 8.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1779 mSDsCounter, 1852 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18509 IncrementalHoareTripleChecker+Invalid, 20363 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1852 mSolverCounterUnsat, 230 mSDtfsCounter, 18509 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1394 GetRequests, 792 SyntacticMatches, 46 SemanticMatches, 556 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15333 ImplicationChecksByTransitivity, 30.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=9, InterpolantAutomatonStates: 322, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 198 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 22.3s InterpolantComputationTime, 1099 NumberOfCodeBlocks, 1089 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1579 ConstructedInterpolants, 7 QuantifiedInterpolants, 13989 SizeOfPredicates, 52 NumberOfNonLiveVariables, 2164 ConjunctsInSsa, 405 ConjunctsInUnsatCore, 36 InterpolantComputations, 3 PerfectInterpolantSequences, 1098/1753 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown