/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/s42if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 10:48:10,731 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 10:48:10,814 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 10:48:10,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 10:48:10,820 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 10:48:10,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 10:48:10,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 10:48:10,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 10:48:10,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 10:48:10,851 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 10:48:10,852 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 10:48:10,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 10:48:10,853 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 10:48:10,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 10:48:10,854 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 10:48:10,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 10:48:10,855 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 10:48:10,855 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 10:48:10,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 10:48:10,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 10:48:10,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 10:48:10,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 10:48:10,857 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 10:48:10,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 10:48:10,857 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 10:48:10,857 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 10:48:10,857 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 10:48:10,858 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 10:48:10,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 10:48:10,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 10:48:10,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 10:48:10,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 10:48:10,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:48:10,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 10:48:10,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 10:48:10,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 10:48:10,860 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 10:48:10,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 10:48:10,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 10:48:10,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 10:48:10,861 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 10:48:10,861 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 10:48:10,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 10:48:10,861 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 10:48:11,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 10:48:11,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 10:48:11,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 10:48:11,114 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 10:48:11,116 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 10:48:11,117 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s42if.c [2023-12-20 10:48:12,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 10:48:12,423 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 10:48:12,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s42if.c [2023-12-20 10:48:12,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e99998acc/b09a7e37bda94e40b4a915a2655181e8/FLAGff53d3d29 [2023-12-20 10:48:12,446 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e99998acc/b09a7e37bda94e40b4a915a2655181e8 [2023-12-20 10:48:12,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 10:48:12,449 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 10:48:12,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 10:48:12,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 10:48:12,456 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 10:48:12,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336fb01d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12, skipping insertion in model container [2023-12-20 10:48:12,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,479 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 10:48:12,590 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-fpi/s42if.c[588,601] [2023-12-20 10:48:12,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:48:12,619 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 10:48:12,628 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-fpi/s42if.c[588,601] [2023-12-20 10:48:12,635 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:48:12,647 INFO L206 MainTranslator]: Completed translation [2023-12-20 10:48:12,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12 WrapperNode [2023-12-20 10:48:12,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 10:48:12,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 10:48:12,648 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 10:48:12,648 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 10:48:12,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,659 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,675 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2023-12-20 10:48:12,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 10:48:12,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 10:48:12,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 10:48:12,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 10:48:12,685 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,702 INFO L175 MemorySlicer]: Split 25 memory accesses to 4 slices as follows [2, 8, 6, 9]. 36 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 3, 3]. [2023-12-20 10:48:12,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,714 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 10:48:12,715 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 10:48:12,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 10:48:12,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 10:48:12,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (1/1) ... [2023-12-20 10:48:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:48:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:12,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 10:48:12,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 10:48:12,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 10:48:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 10:48:12,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 10:48:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 10:48:12,828 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 10:48:12,829 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 10:48:12,967 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 10:48:12,988 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 10:48:12,988 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 10:48:12,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:48:12 BoogieIcfgContainer [2023-12-20 10:48:12,989 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 10:48:12,991 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 10:48:12,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 10:48:12,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 10:48:12,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 10:48:12" (1/3) ... [2023-12-20 10:48:12,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79467b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:48:12, skipping insertion in model container [2023-12-20 10:48:12,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:48:12" (2/3) ... [2023-12-20 10:48:12,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79467b74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:48:12, skipping insertion in model container [2023-12-20 10:48:12,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:48:12" (3/3) ... [2023-12-20 10:48:12,996 INFO L112 eAbstractionObserver]: Analyzing ICFG s42if.c [2023-12-20 10:48:13,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 10:48:13,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 10:48:13,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 10:48:13,061 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;@3a9f8abf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 10:48:13,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 10:48:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 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) [2023-12-20 10:48:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 10:48:13,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:13,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:13,069 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:13,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:13,074 INFO L85 PathProgramCache]: Analyzing trace with hash 845365045, now seen corresponding path program 1 times [2023-12-20 10:48:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77220583] [2023-12-20 10:48:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:48:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:13,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77220583] [2023-12-20 10:48:13,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77220583] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:48:13,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:48:13,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 10:48:13,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494534487] [2023-12-20 10:48:13,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:48:13,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 10:48:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 10:48:13,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:48:13,332 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 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 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-20 10:48:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:13,365 INFO L93 Difference]: Finished difference Result 37 states and 55 transitions. [2023-12-20 10:48:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 10:48:13,368 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-12-20 10:48:13,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:13,374 INFO L225 Difference]: With dead ends: 37 [2023-12-20 10:48:13,374 INFO L226 Difference]: Without dead ends: 17 [2023-12-20 10:48:13,376 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 [2023-12-20 10:48:13,380 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:13,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:48:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-20 10:48:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-20 10:48:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 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) [2023-12-20 10:48:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-12-20 10:48:13,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2023-12-20 10:48:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:13,410 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-12-20 10:48:13,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-20 10:48:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-12-20 10:48:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-20 10:48:13,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:13,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 10:48:13,412 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:13,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash 452010334, now seen corresponding path program 1 times [2023-12-20 10:48:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:13,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765254950] [2023-12-20 10:48:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:48:13,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:13,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765254950] [2023-12-20 10:48:13,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765254950] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:48:13,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:48:13,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 10:48:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258279155] [2023-12-20 10:48:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:48:13,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 10:48:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 10:48:13,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:48:13,613 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-12-20 10:48:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:13,682 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2023-12-20 10:48:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 10:48:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2023-12-20 10:48:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:13,684 INFO L225 Difference]: With dead ends: 36 [2023-12-20 10:48:13,685 INFO L226 Difference]: Without dead ends: 24 [2023-12-20 10:48:13,685 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 [2023-12-20 10:48:13,686 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:13,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-20 10:48:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2023-12-20 10:48:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-12-20 10:48:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-20 10:48:13,694 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-12-20 10:48:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:13,694 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-20 10:48:13,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-12-20 10:48:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-20 10:48:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:48:13,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:13,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:13,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 10:48:13,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:13,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:13,695 INFO L85 PathProgramCache]: Analyzing trace with hash 678183220, now seen corresponding path program 1 times [2023-12-20 10:48:13,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:13,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579903716] [2023-12-20 10:48:13,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:13,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:14,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579903716] [2023-12-20 10:48:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579903716] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640564125] [2023-12-20 10:48:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:14,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:14,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:14,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 10:48:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:14,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-20 10:48:14,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:14,511 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 11 treesize of output 7 [2023-12-20 10:48:14,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:14,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640564125] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:14,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-12-20 10:48:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593975919] [2023-12-20 10:48:14,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:14,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 10:48:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 10:48:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-12-20 10:48:14,920 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2023-12-20 10:48:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:15,276 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-12-20 10:48:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 10:48:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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 19 [2023-12-20 10:48:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:15,278 INFO L225 Difference]: With dead ends: 47 [2023-12-20 10:48:15,278 INFO L226 Difference]: Without dead ends: 43 [2023-12-20 10:48:15,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2023-12-20 10:48:15,281 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:15,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 37 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:48:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-20 10:48:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2023-12-20 10:48:15,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 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) [2023-12-20 10:48:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-12-20 10:48:15,291 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2023-12-20 10:48:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:15,291 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-12-20 10:48:15,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 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) [2023-12-20 10:48:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-12-20 10:48:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:48:15,292 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:15,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:15,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:15,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:15,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:15,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash 735441522, now seen corresponding path program 1 times [2023-12-20 10:48:15,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:15,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550296652] [2023-12-20 10:48:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:15,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:15,517 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1810728378] [2023-12-20 10:48:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:15,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:15,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:15,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:15,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 10:48:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:15,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 10:48:15,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:15,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:15,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:15,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2023-12-20 10:48:15,726 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 10:48:15,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2023-12-20 10:48:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:15,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550296652] [2023-12-20 10:48:15,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810728378] [2023-12-20 10:48:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810728378] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:15,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:15,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-20 10:48:15,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634653728] [2023-12-20 10:48:15,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:15,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 10:48:15,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:15,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 10:48:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-20 10:48:15,741 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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) [2023-12-20 10:48:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:15,889 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-12-20 10:48:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 10:48:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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 19 [2023-12-20 10:48:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:15,891 INFO L225 Difference]: With dead ends: 89 [2023-12-20 10:48:15,891 INFO L226 Difference]: Without dead ends: 77 [2023-12-20 10:48:15,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:48:15,893 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:15,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 70 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-20 10:48:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2023-12-20 10:48:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 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) [2023-12-20 10:48:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2023-12-20 10:48:15,903 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 19 [2023-12-20 10:48:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:15,903 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2023-12-20 10:48:15,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 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) [2023-12-20 10:48:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2023-12-20 10:48:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:48:15,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:15,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:15,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-20 10:48:16,110 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1436506100, now seen corresponding path program 1 times [2023-12-20 10:48:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:16,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586952662] [2023-12-20 10:48:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:16,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960462636] [2023-12-20 10:48:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:16,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:16,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:16,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 10:48:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:16,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-20 10:48:16,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:16,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:48:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:16,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:16,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-20 10:48:16,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-20 10:48:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586952662] [2023-12-20 10:48:16,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960462636] [2023-12-20 10:48:16,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960462636] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:16,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:16,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-20 10:48:16,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627601518] [2023-12-20 10:48:16,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:16,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 10:48:16,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:16,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 10:48:16,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-20 10:48:16,276 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-12-20 10:48:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:16,339 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2023-12-20 10:48:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 10:48:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 19 [2023-12-20 10:48:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:16,343 INFO L225 Difference]: With dead ends: 75 [2023-12-20 10:48:16,343 INFO L226 Difference]: Without dead ends: 54 [2023-12-20 10:48:16,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-20 10:48:16,344 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:16,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 48 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:48:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-20 10:48:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2023-12-20 10:48:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 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) [2023-12-20 10:48:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2023-12-20 10:48:16,357 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 19 [2023-12-20 10:48:16,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:16,358 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2023-12-20 10:48:16,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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) [2023-12-20 10:48:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2023-12-20 10:48:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 10:48:16,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:16,359 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:16,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:16,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:16,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:16,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:16,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1950697993, now seen corresponding path program 2 times [2023-12-20 10:48:16,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:16,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173148697] [2023-12-20 10:48:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:16,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:16,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173148697] [2023-12-20 10:48:16,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173148697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:16,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599704368] [2023-12-20 10:48:16,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:48:16,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:16,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:16,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:16,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 10:48:16,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:48:16,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:16,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:48:16,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:16,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:16,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599704368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:16,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:16,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 10:48:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924549017] [2023-12-20 10:48:16,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:16,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 10:48:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 10:48:16,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-20 10:48:16,806 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2023-12-20 10:48:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:16,937 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2023-12-20 10:48:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 10:48:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) Word has length 20 [2023-12-20 10:48:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:16,939 INFO L225 Difference]: With dead ends: 82 [2023-12-20 10:48:16,939 INFO L226 Difference]: Without dead ends: 72 [2023-12-20 10:48:16,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-20 10:48:16,940 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:16,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:16,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-20 10:48:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2023-12-20 10:48:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 49 states have internal predecessors, (65), 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) [2023-12-20 10:48:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2023-12-20 10:48:16,955 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 20 [2023-12-20 10:48:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:16,955 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2023-12-20 10:48:16,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2023-12-20 10:48:16,955 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2023-12-20 10:48:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 10:48:16,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:16,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:16,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:17,161 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:17,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1769185541, now seen corresponding path program 3 times [2023-12-20 10:48:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:17,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949330467] [2023-12-20 10:48:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:17,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:17,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949330467] [2023-12-20 10:48:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949330467] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:17,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460709399] [2023-12-20 10:48:17,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:48:17,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:17,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:17,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:17,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 10:48:17,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 10:48:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:17,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:48:17,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:17,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:17,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460709399] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:17,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:17,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 10:48:17,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227531236] [2023-12-20 10:48:17,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 10:48:17,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:17,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 10:48:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-20 10:48:17,385 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2023-12-20 10:48:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:17,480 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-12-20 10:48:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 10:48:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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 [2023-12-20 10:48:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:17,481 INFO L225 Difference]: With dead ends: 74 [2023-12-20 10:48:17,481 INFO L226 Difference]: Without dead ends: 38 [2023-12-20 10:48:17,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-20 10:48:17,483 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:17,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 18 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-20 10:48:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-12-20 10:48:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 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) [2023-12-20 10:48:17,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-12-20 10:48:17,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2023-12-20 10:48:17,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:17,492 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-12-20 10:48:17,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 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) [2023-12-20 10:48:17,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-12-20 10:48:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:48:17,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:17,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:17,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:17,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:17,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:17,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1237862050, now seen corresponding path program 4 times [2023-12-20 10:48:17,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:17,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377896052] [2023-12-20 10:48:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:17,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:18,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:18,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377896052] [2023-12-20 10:48:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377896052] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:18,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296693861] [2023-12-20 10:48:18,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:48:18,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:18,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:18,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:18,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 10:48:18,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:48:18,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:18,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-20 10:48:18,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:18,195 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 11 treesize of output 7 [2023-12-20 10:48:18,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:18,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:48:18,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:48:18,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296693861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:18,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:18,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2023-12-20 10:48:18,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607788773] [2023-12-20 10:48:18,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:18,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 10:48:18,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:18,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 10:48:18,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 10:48:18,874 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2023-12-20 10:48:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:19,640 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2023-12-20 10:48:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-20 10:48:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 26 [2023-12-20 10:48:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:19,641 INFO L225 Difference]: With dead ends: 89 [2023-12-20 10:48:19,641 INFO L226 Difference]: Without dead ends: 80 [2023-12-20 10:48:19,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 10:48:19,643 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:19,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 125 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 10:48:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-20 10:48:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 61. [2023-12-20 10:48:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 60 states have internal predecessors, (77), 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) [2023-12-20 10:48:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2023-12-20 10:48:19,653 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 26 [2023-12-20 10:48:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:19,653 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2023-12-20 10:48:19,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2023-12-20 10:48:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2023-12-20 10:48:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:48:19,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:19,654 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:19,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:19,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:19,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:19,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1180603748, now seen corresponding path program 1 times [2023-12-20 10:48:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:19,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296613901] [2023-12-20 10:48:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:19,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:19,873 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:19,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705480942] [2023-12-20 10:48:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:19,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:19,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 10:48:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:19,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 10:48:19,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:19,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:20,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:48:20,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:20,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-12-20 10:48:20,109 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 10:48:20,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 16 [2023-12-20 10:48:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:48:20,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:20,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296613901] [2023-12-20 10:48:20,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:20,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705480942] [2023-12-20 10:48:20,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705480942] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:20,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:20,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-20 10:48:20,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823837236] [2023-12-20 10:48:20,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:20,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-20 10:48:20,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:20,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-20 10:48:20,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-12-20 10:48:20,131 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2023-12-20 10:48:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:20,325 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2023-12-20 10:48:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-20 10:48:20,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) Word has length 26 [2023-12-20 10:48:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:20,326 INFO L225 Difference]: With dead ends: 108 [2023-12-20 10:48:20,326 INFO L226 Difference]: Without dead ends: 101 [2023-12-20 10:48:20,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-12-20 10:48:20,327 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 92 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:20,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 86 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-20 10:48:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2023-12-20 10:48:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 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) [2023-12-20 10:48:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2023-12-20 10:48:20,352 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 26 [2023-12-20 10:48:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:20,352 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2023-12-20 10:48:20,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) [2023-12-20 10:48:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2023-12-20 10:48:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 10:48:20,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:20,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:20,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:20,559 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:20,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2103246298, now seen corresponding path program 1 times [2023-12-20 10:48:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:20,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691600720] [2023-12-20 10:48:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:20,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575403527] [2023-12-20 10:48:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:20,573 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:20,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 10:48:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:20,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 10:48:20,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:20,666 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 11 treesize of output 7 [2023-12-20 10:48:20,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:48:20,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:48:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:20,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:20,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 10:48:20,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 10:48:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:20,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691600720] [2023-12-20 10:48:20,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575403527] [2023-12-20 10:48:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575403527] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:20,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:20,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-20 10:48:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270054612] [2023-12-20 10:48:20,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-20 10:48:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-20 10:48:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-20 10:48:20,816 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2023-12-20 10:48:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:20,923 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2023-12-20 10:48:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:48:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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 26 [2023-12-20 10:48:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:20,925 INFO L225 Difference]: With dead ends: 109 [2023-12-20 10:48:20,925 INFO L226 Difference]: Without dead ends: 78 [2023-12-20 10:48:20,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:48:20,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:20,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-20 10:48:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2023-12-20 10:48:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.25) internal successors, (85), 68 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) [2023-12-20 10:48:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2023-12-20 10:48:20,939 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 26 [2023-12-20 10:48:20,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:20,940 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2023-12-20 10:48:20,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 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) [2023-12-20 10:48:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2023-12-20 10:48:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 10:48:20,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:20,940 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:20,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 10:48:21,146 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:21,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash -939265221, now seen corresponding path program 5 times [2023-12-20 10:48:21,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:21,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038745450] [2023-12-20 10:48:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:21,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:21,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:21,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:21,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038745450] [2023-12-20 10:48:21,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038745450] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:21,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003997446] [2023-12-20 10:48:21,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:48:21,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:21,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:21,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:21,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 10:48:21,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-20 10:48:21,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:21,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:48:21,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:21,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:21,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003997446] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:21,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 10:48:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839562949] [2023-12-20 10:48:21,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 10:48:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 10:48:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:48:21,475 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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) [2023-12-20 10:48:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:21,653 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2023-12-20 10:48:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 10:48:21,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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 27 [2023-12-20 10:48:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:21,654 INFO L225 Difference]: With dead ends: 112 [2023-12-20 10:48:21,654 INFO L226 Difference]: Without dead ends: 97 [2023-12-20 10:48:21,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-12-20 10:48:21,655 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:21,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 23 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-12-20 10:48:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2023-12-20 10:48:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 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) [2023-12-20 10:48:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2023-12-20 10:48:21,665 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 27 [2023-12-20 10:48:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:21,666 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2023-12-20 10:48:21,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 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) [2023-12-20 10:48:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2023-12-20 10:48:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-20 10:48:21,666 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:21,666 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:21,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:21,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:21,872 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:21,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash 979910811, now seen corresponding path program 6 times [2023-12-20 10:48:21,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:21,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345582098] [2023-12-20 10:48:21,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:21,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:21,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345582098] [2023-12-20 10:48:21,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345582098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:21,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942991160] [2023-12-20 10:48:21,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 10:48:21,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:21,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:21,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:21,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 10:48:22,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 10:48:22,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:22,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:48:22,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:22,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:22,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-20 10:48:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942991160] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:22,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:22,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 10:48:22,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189327221] [2023-12-20 10:48:22,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 10:48:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 10:48:22,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:48:22,167 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2023-12-20 10:48:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:22,310 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2023-12-20 10:48:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:48:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) Word has length 29 [2023-12-20 10:48:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:22,311 INFO L225 Difference]: With dead ends: 101 [2023-12-20 10:48:22,311 INFO L226 Difference]: Without dead ends: 48 [2023-12-20 10:48:22,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:48:22,312 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 55 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:22,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 22 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-20 10:48:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-12-20 10:48:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 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) [2023-12-20 10:48:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-12-20 10:48:22,319 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 29 [2023-12-20 10:48:22,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:22,319 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-12-20 10:48:22,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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) [2023-12-20 10:48:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-12-20 10:48:22,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 10:48:22,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:22,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:22,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:22,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 10:48:22,526 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:22,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:22,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2065802316, now seen corresponding path program 7 times [2023-12-20 10:48:22,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:22,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402649883] [2023-12-20 10:48:22,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:22,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:23,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402649883] [2023-12-20 10:48:23,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402649883] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:23,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726384431] [2023-12-20 10:48:23,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 10:48:23,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:23,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:23,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:23,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 10:48:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:23,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-20 10:48:23,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:23,180 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 11 treesize of output 7 [2023-12-20 10:48:23,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:23,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:23,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:23,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726384431] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:23,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:23,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 33 [2023-12-20 10:48:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813416677] [2023-12-20 10:48:23,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 10:48:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 10:48:23,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 10:48:23,784 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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) [2023-12-20 10:48:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:24,870 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2023-12-20 10:48:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-20 10:48:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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) Word has length 33 [2023-12-20 10:48:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:24,872 INFO L225 Difference]: With dead ends: 142 [2023-12-20 10:48:24,872 INFO L226 Difference]: Without dead ends: 133 [2023-12-20 10:48:24,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=382, Invalid=3158, Unknown=0, NotChecked=0, Total=3540 [2023-12-20 10:48:24,878 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:24,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 187 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 10:48:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-20 10:48:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2023-12-20 10:48:24,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 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) [2023-12-20 10:48:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2023-12-20 10:48:24,895 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 33 [2023-12-20 10:48:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:24,895 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2023-12-20 10:48:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 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) [2023-12-20 10:48:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2023-12-20 10:48:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 10:48:24,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:24,896 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:24,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 10:48:25,102 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:25,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2008544014, now seen corresponding path program 2 times [2023-12-20 10:48:25,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:25,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334892361] [2023-12-20 10:48:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:25,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:25,116 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:25,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539005033] [2023-12-20 10:48:25,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:48:25,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:25,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:25,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:25,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 10:48:25,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:48:25,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:25,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-20 10:48:25,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:25,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:48:25,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:25,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2023-12-20 10:48:25,400 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 10:48:25,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 16 [2023-12-20 10:48:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-20 10:48:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334892361] [2023-12-20 10:48:25,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:25,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539005033] [2023-12-20 10:48:25,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539005033] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:25,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-12-20 10:48:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263637731] [2023-12-20 10:48:25,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:25,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 10:48:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 10:48:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-12-20 10:48:25,433 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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) [2023-12-20 10:48:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:25,689 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2023-12-20 10:48:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 10:48:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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 33 [2023-12-20 10:48:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:25,690 INFO L225 Difference]: With dead ends: 139 [2023-12-20 10:48:25,691 INFO L226 Difference]: Without dead ends: 132 [2023-12-20 10:48:25,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-12-20 10:48:25,691 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:25,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 110 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:48:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-20 10:48:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2023-12-20 10:48:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.2577319587628866) internal successors, (122), 97 states have internal predecessors, (122), 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) [2023-12-20 10:48:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2023-12-20 10:48:25,709 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 33 [2023-12-20 10:48:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:25,709 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2023-12-20 10:48:25,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 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) [2023-12-20 10:48:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2023-12-20 10:48:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-20 10:48:25,710 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:25,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:25,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:25,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 10:48:25,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:25,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash 698075380, now seen corresponding path program 2 times [2023-12-20 10:48:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:25,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070326310] [2023-12-20 10:48:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:25,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:25,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873881188] [2023-12-20 10:48:25,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:48:25,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:25,940 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:25,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 10:48:26,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:48:26,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:26,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-20 10:48:26,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:26,085 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 11 treesize of output 7 [2023-12-20 10:48:26,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:48:26,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:48:26,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:48:26,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-12-20 10:48:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:26,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:26,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-20 10:48:26,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-20 10:48:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:26,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070326310] [2023-12-20 10:48:26,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873881188] [2023-12-20 10:48:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873881188] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:26,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:26,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-12-20 10:48:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948957877] [2023-12-20 10:48:26,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:26,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 10:48:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 10:48:26,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:48:26,258 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2023-12-20 10:48:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:26,388 INFO L93 Difference]: Finished difference Result 158 states and 204 transitions. [2023-12-20 10:48:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 10:48:26,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) Word has length 33 [2023-12-20 10:48:26,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:26,398 INFO L225 Difference]: With dead ends: 158 [2023-12-20 10:48:26,398 INFO L226 Difference]: Without dead ends: 109 [2023-12-20 10:48:26,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-12-20 10:48:26,402 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:26,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-20 10:48:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2023-12-20 10:48:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.2525252525252526) internal successors, (124), 99 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) [2023-12-20 10:48:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-12-20 10:48:26,421 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 33 [2023-12-20 10:48:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:26,421 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-12-20 10:48:26,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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) [2023-12-20 10:48:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-12-20 10:48:26,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 10:48:26,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:26,422 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:26,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:26,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 10:48:26,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -437010633, now seen corresponding path program 8 times [2023-12-20 10:48:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110231606] [2023-12-20 10:48:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:26,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110231606] [2023-12-20 10:48:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110231606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078231952] [2023-12-20 10:48:26,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:48:26,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:26,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:26,748 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:26,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 10:48:26,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:48:26,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:26,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 10:48:26,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:26,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:26,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078231952] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:26,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:26,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 10:48:26,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539291679] [2023-12-20 10:48:26,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:26,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 10:48:26,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:26,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 10:48:26,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:48:26,973 INFO L87 Difference]: Start difference. First operand 100 states and 124 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) [2023-12-20 10:48:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:27,198 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2023-12-20 10:48:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-20 10:48:27,198 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 34 [2023-12-20 10:48:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:27,199 INFO L225 Difference]: With dead ends: 149 [2023-12-20 10:48:27,199 INFO L226 Difference]: Without dead ends: 131 [2023-12-20 10:48:27,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-12-20 10:48:27,200 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 102 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:27,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 22 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-20 10:48:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 91. [2023-12-20 10:48:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 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) [2023-12-20 10:48:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2023-12-20 10:48:27,216 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 34 [2023-12-20 10:48:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:27,216 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2023-12-20 10:48:27,216 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) [2023-12-20 10:48:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2023-12-20 10:48:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 10:48:27,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:27,217 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:27,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:27,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:27,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:27,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1808627333, now seen corresponding path program 9 times [2023-12-20 10:48:27,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:27,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989990522] [2023-12-20 10:48:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:27,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989990522] [2023-12-20 10:48:27,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989990522] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452104458] [2023-12-20 10:48:27,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:48:27,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:27,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:27,544 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:27,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 10:48:27,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 10:48:27,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:27,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 10:48:27,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:27,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:48:27,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452104458] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:27,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:27,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 10:48:27,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145705233] [2023-12-20 10:48:27,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 10:48:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 10:48:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:48:27,796 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 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) [2023-12-20 10:48:27,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:27,942 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2023-12-20 10:48:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 10:48:27,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 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 36 [2023-12-20 10:48:27,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:27,943 INFO L225 Difference]: With dead ends: 133 [2023-12-20 10:48:27,943 INFO L226 Difference]: Without dead ends: 58 [2023-12-20 10:48:27,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-20 10:48:27,944 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:27,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 22 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-20 10:48:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2023-12-20 10:48:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 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) [2023-12-20 10:48:27,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-12-20 10:48:27,954 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 36 [2023-12-20 10:48:27,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:27,954 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-12-20 10:48:27,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 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) [2023-12-20 10:48:27,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-12-20 10:48:27,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 10:48:27,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:27,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:27,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-20 10:48:28,161 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:28,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 524550494, now seen corresponding path program 10 times [2023-12-20 10:48:28,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892562229] [2023-12-20 10:48:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:48:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:48:28,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892562229] [2023-12-20 10:48:28,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892562229] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:48:28,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188124637] [2023-12-20 10:48:28,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:48:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:28,866 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:28,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 10:48:28,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:48:28,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:28,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-20 10:48:29,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:29,006 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 11 treesize of output 7 [2023-12-20 10:48:29,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:29,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:29,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:29,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:48:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:48:29,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:48:30,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188124637] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:30,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:48:30,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 42 [2023-12-20 10:48:30,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704336537] [2023-12-20 10:48:30,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:30,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 10:48:30,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:30,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 10:48:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1585, Unknown=3, NotChecked=0, Total=1722 [2023-12-20 10:48:30,766 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 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) [2023-12-20 10:48:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:32,828 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2023-12-20 10:48:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-20 10:48:32,829 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 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 [2023-12-20 10:48:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:32,830 INFO L225 Difference]: With dead ends: 184 [2023-12-20 10:48:32,830 INFO L226 Difference]: Without dead ends: 175 [2023-12-20 10:48:32,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=562, Invalid=6077, Unknown=3, NotChecked=0, Total=6642 [2023-12-20 10:48:32,832 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:32,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 304 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1951 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 10:48:32,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-20 10:48:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2023-12-20 10:48:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.2605042016806722) internal successors, (150), 119 states have internal predecessors, (150), 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) [2023-12-20 10:48:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 150 transitions. [2023-12-20 10:48:32,856 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 150 transitions. Word has length 40 [2023-12-20 10:48:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:32,857 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 150 transitions. [2023-12-20 10:48:32,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 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) [2023-12-20 10:48:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 150 transitions. [2023-12-20 10:48:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 10:48:32,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:32,857 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:32,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-20 10:48:33,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 10:48:33,064 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:33,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 581808796, now seen corresponding path program 3 times [2023-12-20 10:48:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:33,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314686167] [2023-12-20 10:48:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:33,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:33,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28564449] [2023-12-20 10:48:33,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:48:33,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:33,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:33,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 10:48:33,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 10:48:33,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:33,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-20 10:48:33,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:33,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-20 10:48:33,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:48:33,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-20 10:48:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 10:48:33,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:48:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-20 10:48:33,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:48:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314686167] [2023-12-20 10:48:33,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:48:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28564449] [2023-12-20 10:48:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28564449] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:48:33,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:48:33,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2023-12-20 10:48:33,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915691253] [2023-12-20 10:48:33,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:48:33,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-20 10:48:33,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:48:33,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-20 10:48:33,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-12-20 10:48:33,417 INFO L87 Difference]: Start difference. First operand 120 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2023-12-20 10:48:33,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:48:33,650 INFO L93 Difference]: Finished difference Result 196 states and 250 transitions. [2023-12-20 10:48:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 10:48:33,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) Word has length 40 [2023-12-20 10:48:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:48:33,651 INFO L225 Difference]: With dead ends: 196 [2023-12-20 10:48:33,651 INFO L226 Difference]: Without dead ends: 192 [2023-12-20 10:48:33,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-12-20 10:48:33,652 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:48:33,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:48:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-20 10:48:33,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 173. [2023-12-20 10:48:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.302325581395349) internal successors, (224), 172 states have internal predecessors, (224), 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) [2023-12-20 10:48:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 224 transitions. [2023-12-20 10:48:33,690 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 224 transitions. Word has length 40 [2023-12-20 10:48:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:48:33,691 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 224 transitions. [2023-12-20 10:48:33,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2023-12-20 10:48:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2023-12-20 10:48:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 10:48:33,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:48:33,691 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:48:33,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 10:48:33,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:33,896 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:48:33,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:48:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash -235839654, now seen corresponding path program 3 times [2023-12-20 10:48:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:48:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172551775] [2023-12-20 10:48:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:48:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:48:33,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:48:33,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074370402] [2023-12-20 10:48:33,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:48:33,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:48:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:48:33,908 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:48:33,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 10:48:34,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 10:48:34,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:48:34,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-20 10:48:34,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:48:34,062 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 11 [2023-12-20 10:48:34,120 INFO L349 Elim1Store]: treesize reduction 38, result has 24.0 percent of original size [2023-12-20 10:48:34,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2023-12-20 10:48:34,153 INFO L349 Elim1Store]: treesize reduction 38, result has 24.0 percent of original size [2023-12-20 10:48:34,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 29 [2023-12-20 10:48:34,180 INFO L349 Elim1Store]: treesize reduction 21, result has 58.0 percent of original size [2023-12-20 10:48:34,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 45 [2023-12-20 10:48:34,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:48:34,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-20 10:48:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:48:34,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:40,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2023-12-20 10:49:40,080 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-20 10:49:40,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 397 treesize of output 301 [2023-12-20 10:49:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:49:40,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:40,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172551775] [2023-12-20 10:49:40,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:49:40,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074370402] [2023-12-20 10:49:40,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074370402] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:40,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:49:40,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2023-12-20 10:49:40,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162678365] [2023-12-20 10:49:40,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:40,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 10:49:40,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:40,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 10:49:40,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=502, Unknown=13, NotChecked=0, Total=650 [2023-12-20 10:49:40,112 INFO L87 Difference]: Start difference. First operand 173 states and 224 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 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) [2023-12-20 10:49:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:40,908 INFO L93 Difference]: Finished difference Result 183 states and 234 transitions. [2023-12-20 10:49:40,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 10:49:40,908 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 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 [2023-12-20 10:49:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:40,909 INFO L225 Difference]: With dead ends: 183 [2023-12-20 10:49:40,909 INFO L226 Difference]: Without dead ends: 125 [2023-12-20 10:49:40,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=412, Invalid=1297, Unknown=13, NotChecked=0, Total=1722 [2023-12-20 10:49:40,910 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 84 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:40,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 10:49:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-20 10:49:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2023-12-20 10:49:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 120 states have internal predecessors, (149), 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) [2023-12-20 10:49:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2023-12-20 10:49:40,939 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 40 [2023-12-20 10:49:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:40,939 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2023-12-20 10:49:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 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) [2023-12-20 10:49:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2023-12-20 10:49:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-20 10:49:40,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:40,940 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:40,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:41,144 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:41,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1994181509, now seen corresponding path program 11 times [2023-12-20 10:49:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:41,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840737701] [2023-12-20 10:49:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:49:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840737701] [2023-12-20 10:49:41,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840737701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:49:41,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240238006] [2023-12-20 10:49:41,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:49:41,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:41,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:41,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 10:49:41,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 10:49:41,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:41,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-20 10:49:41,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:49:41,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:49:41,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240238006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:41,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:49:41,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-20 10:49:41,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675733545] [2023-12-20 10:49:41,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:41,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 10:49:41,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:41,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 10:49:41,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-20 10:49:41,921 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) [2023-12-20 10:49:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:42,351 INFO L93 Difference]: Finished difference Result 187 states and 229 transitions. [2023-12-20 10:49:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:49:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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 41 [2023-12-20 10:49:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:42,352 INFO L225 Difference]: With dead ends: 187 [2023-12-20 10:49:42,353 INFO L226 Difference]: Without dead ends: 167 [2023-12-20 10:49:42,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-12-20 10:49:42,354 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:42,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 30 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 10:49:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-20 10:49:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2023-12-20 10:49:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 109 states have internal predecessors, (136), 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) [2023-12-20 10:49:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2023-12-20 10:49:42,376 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 41 [2023-12-20 10:49:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:42,376 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2023-12-20 10:49:42,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) [2023-12-20 10:49:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2023-12-20 10:49:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 10:49:42,376 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:42,376 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:42,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:42,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:42,579 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:42,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:42,579 INFO L85 PathProgramCache]: Analyzing trace with hash -963184485, now seen corresponding path program 12 times [2023-12-20 10:49:42,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:42,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428393484] [2023-12-20 10:49:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:42,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-12-20 10:49:42,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:42,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428393484] [2023-12-20 10:49:42,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428393484] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:49:42,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086321224] [2023-12-20 10:49:42,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 10:49:42,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:42,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:42,752 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:42,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 10:49:42,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-20 10:49:42,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:42,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-20 10:49:42,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-20 10:49:43,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 10:49:43,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086321224] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:43,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:49:43,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 17] total 26 [2023-12-20 10:49:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31723946] [2023-12-20 10:49:43,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:43,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-20 10:49:43,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-20 10:49:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2023-12-20 10:49:43,303 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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) [2023-12-20 10:49:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:43,596 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2023-12-20 10:49:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 10:49:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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 43 [2023-12-20 10:49:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:43,597 INFO L225 Difference]: With dead ends: 168 [2023-12-20 10:49:43,597 INFO L226 Difference]: Without dead ends: 74 [2023-12-20 10:49:43,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=851, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 10:49:43,599 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:43,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 16 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:49:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-20 10:49:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2023-12-20 10:49:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 61 states have internal predecessors, (73), 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) [2023-12-20 10:49:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-12-20 10:49:43,612 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 43 [2023-12-20 10:49:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:43,613 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-12-20 10:49:43,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 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) [2023-12-20 10:49:43,613 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-12-20 10:49:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 10:49:43,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:43,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:43,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:43,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-20 10:49:43,814 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:43,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash 810092084, now seen corresponding path program 13 times [2023-12-20 10:49:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:43,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998103168] [2023-12-20 10:49:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:44,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998103168] [2023-12-20 10:49:44,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998103168] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:49:44,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767893192] [2023-12-20 10:49:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 10:49:44,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:44,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:44,725 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:44,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 10:49:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:44,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-20 10:49:44,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:44,839 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 11 treesize of output 7 [2023-12-20 10:49:44,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:49:45,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:49:45,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:49:45,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:49:45,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:49:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:45,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767893192] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:46,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:49:46,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 51 [2023-12-20 10:49:46,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652669425] [2023-12-20 10:49:46,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:46,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-20 10:49:46,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:46,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-20 10:49:46,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2023-12-20 10:49:46,647 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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) [2023-12-20 10:49:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:50,787 INFO L93 Difference]: Finished difference Result 226 states and 269 transitions. [2023-12-20 10:49:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-20 10:49:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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 47 [2023-12-20 10:49:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:50,788 INFO L225 Difference]: With dead ends: 226 [2023-12-20 10:49:50,788 INFO L226 Difference]: Without dead ends: 215 [2023-12-20 10:49:50,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=785, Invalid=10557, Unknown=0, NotChecked=0, Total=11342 [2023-12-20 10:49:50,791 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 3472 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:50,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 410 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3472 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-20 10:49:50,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-12-20 10:49:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2023-12-20 10:49:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2605633802816902) internal successors, (179), 142 states have internal predecessors, (179), 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) [2023-12-20 10:49:50,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2023-12-20 10:49:50,830 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 47 [2023-12-20 10:49:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:50,830 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2023-12-20 10:49:50,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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) [2023-12-20 10:49:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2023-12-20 10:49:50,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 10:49:50,831 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:50,831 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:50,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:51,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 10:49:51,031 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:51,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1490150454, now seen corresponding path program 4 times [2023-12-20 10:49:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059548250] [2023-12-20 10:49:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:51,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:51,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:49:51,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788104527] [2023-12-20 10:49:51,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:49:51,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:51,045 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:51,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 10:49:51,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:49:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:51,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 10:49:51,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:51,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-12-20 10:49:51,232 INFO L349 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2023-12-20 10:49:51,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2023-12-20 10:49:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-20 10:49:51,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:51,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-12-20 10:49:51,610 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-12-20 10:49:51,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 114 [2023-12-20 10:49:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-20 10:49:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059548250] [2023-12-20 10:49:51,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:49:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788104527] [2023-12-20 10:49:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788104527] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:51,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:49:51,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2023-12-20 10:49:51,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226522477] [2023-12-20 10:49:51,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:51,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-20 10:49:51,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:51,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-20 10:49:51,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-12-20 10:49:51,644 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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) [2023-12-20 10:49:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:52,147 INFO L93 Difference]: Finished difference Result 245 states and 313 transitions. [2023-12-20 10:49:52,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-20 10:49:52,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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) Word has length 47 [2023-12-20 10:49:52,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:52,148 INFO L225 Difference]: With dead ends: 245 [2023-12-20 10:49:52,148 INFO L226 Difference]: Without dead ends: 216 [2023-12-20 10:49:52,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-12-20 10:49:52,149 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:52,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 128 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 10:49:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-12-20 10:49:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2023-12-20 10:49:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.2659574468085106) internal successors, (238), 188 states have internal predecessors, (238), 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) [2023-12-20 10:49:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 238 transitions. [2023-12-20 10:49:52,203 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 238 transitions. Word has length 47 [2023-12-20 10:49:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:52,203 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 238 transitions. [2023-12-20 10:49:52,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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) [2023-12-20 10:49:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 238 transitions. [2023-12-20 10:49:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-20 10:49:52,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:52,204 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:52,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:52,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:52,409 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:52,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1552190068, now seen corresponding path program 4 times [2023-12-20 10:49:52,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:52,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553231640] [2023-12-20 10:49:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:52,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:49:52,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302554525] [2023-12-20 10:49:52,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:49:52,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:52,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:52,422 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:52,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 10:49:52,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:49:52,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:52,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-20 10:49:52,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:52,530 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 16 treesize of output 12 [2023-12-20 10:49:52,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-12-20 10:49:52,611 INFO L349 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2023-12-20 10:49:52,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2023-12-20 10:49:52,701 INFO L349 Elim1Store]: treesize reduction 55, result has 39.6 percent of original size [2023-12-20 10:49:52,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 64 [2023-12-20 10:49:52,928 INFO L349 Elim1Store]: treesize reduction 55, result has 39.6 percent of original size [2023-12-20 10:49:52,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 96 [2023-12-20 10:49:53,212 INFO L349 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2023-12-20 10:49:53,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 91 [2023-12-20 10:49:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 10:49:53,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-20 10:49:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:53,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553231640] [2023-12-20 10:49:53,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:49:53,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302554525] [2023-12-20 10:49:53,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302554525] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:53,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:49:53,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2023-12-20 10:49:53,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377829275] [2023-12-20 10:49:53,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:53,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-20 10:49:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:53,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-20 10:49:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-12-20 10:49:53,778 INFO L87 Difference]: Start difference. First operand 189 states and 238 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 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) [2023-12-20 10:49:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:55,134 INFO L93 Difference]: Finished difference Result 327 states and 421 transitions. [2023-12-20 10:49:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-20 10:49:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 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 47 [2023-12-20 10:49:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:55,137 INFO L225 Difference]: With dead ends: 327 [2023-12-20 10:49:55,137 INFO L226 Difference]: Without dead ends: 221 [2023-12-20 10:49:55,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=496, Invalid=2474, Unknown=0, NotChecked=0, Total=2970 [2023-12-20 10:49:55,139 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:55,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 55 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 10:49:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-20 10:49:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 201. [2023-12-20 10:49:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.27) internal successors, (254), 200 states have internal predecessors, (254), 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) [2023-12-20 10:49:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 254 transitions. [2023-12-20 10:49:55,183 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 254 transitions. Word has length 47 [2023-12-20 10:49:55,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:55,184 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 254 transitions. [2023-12-20 10:49:55,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 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) [2023-12-20 10:49:55,184 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 254 transitions. [2023-12-20 10:49:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-20 10:49:55,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:55,185 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:55,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:55,390 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:55,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1576831095, now seen corresponding path program 14 times [2023-12-20 10:49:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034456070] [2023-12-20 10:49:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:55,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034456070] [2023-12-20 10:49:55,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034456070] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:49:55,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815090985] [2023-12-20 10:49:55,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:49:55,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:55,612 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:55,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 10:49:55,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:49:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:55,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 10:49:55,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:55,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:56,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815090985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:56,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:49:56,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 10:49:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232864981] [2023-12-20 10:49:56,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:56,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 10:49:56,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 10:49:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 10:49:56,013 INFO L87 Difference]: Start difference. First operand 201 states and 254 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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) [2023-12-20 10:49:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:56,529 INFO L93 Difference]: Finished difference Result 292 states and 363 transitions. [2023-12-20 10:49:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 10:49:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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 48 [2023-12-20 10:49:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:56,530 INFO L225 Difference]: With dead ends: 292 [2023-12-20 10:49:56,530 INFO L226 Difference]: Without dead ends: 269 [2023-12-20 10:49:56,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 76 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 10:49:56,531 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:56,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 32 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 10:49:56,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-12-20 10:49:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 178. [2023-12-20 10:49:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.2768361581920904) internal successors, (226), 177 states have internal predecessors, (226), 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) [2023-12-20 10:49:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 226 transitions. [2023-12-20 10:49:56,585 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 226 transitions. Word has length 48 [2023-12-20 10:49:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:56,585 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 226 transitions. [2023-12-20 10:49:56,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 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) [2023-12-20 10:49:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 226 transitions. [2023-12-20 10:49:56,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-20 10:49:56,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:56,586 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:56,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-20 10:49:56,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 10:49:56,792 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:56,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1571077125, now seen corresponding path program 15 times [2023-12-20 10:49:56,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:56,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672827383] [2023-12-20 10:49:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:56,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672827383] [2023-12-20 10:49:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672827383] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:49:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243592645] [2023-12-20 10:49:56,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:49:56,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:57,001 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:57,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 10:49:57,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 10:49:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:57,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 10:49:57,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:57,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:49:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-20 10:49:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243592645] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:49:57,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:49:57,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 10:49:57,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668598546] [2023-12-20 10:49:57,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:49:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 10:49:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:49:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 10:49:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 10:49:57,494 INFO L87 Difference]: Start difference. First operand 178 states and 226 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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) [2023-12-20 10:49:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:49:57,771 INFO L93 Difference]: Finished difference Result 270 states and 335 transitions. [2023-12-20 10:49:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 10:49:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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 [2023-12-20 10:49:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:49:57,772 INFO L225 Difference]: With dead ends: 270 [2023-12-20 10:49:57,772 INFO L226 Difference]: Without dead ends: 116 [2023-12-20 10:49:57,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-20 10:49:57,773 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:49:57,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 32 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:49:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-20 10:49:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 92. [2023-12-20 10:49:57,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 91 states have internal predecessors, (112), 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) [2023-12-20 10:49:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2023-12-20 10:49:57,792 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 50 [2023-12-20 10:49:57,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:49:57,792 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2023-12-20 10:49:57,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 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) [2023-12-20 10:49:57,792 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2023-12-20 10:49:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 10:49:57,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:49:57,792 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:49:57,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-20 10:49:57,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 10:49:57,993 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:49:57,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:49:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1755186850, now seen corresponding path program 16 times [2023-12-20 10:49:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:49:57,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908039380] [2023-12-20 10:49:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:49:57,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:49:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:49:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-12-20 10:49:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:49:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908039380] [2023-12-20 10:49:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908039380] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:49:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719303638] [2023-12-20 10:49:59,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:49:59,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:49:59,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:49:59,101 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:49:59,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 10:49:59,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:49:59,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:49:59,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-20 10:49:59,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:49:59,282 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 11 treesize of output 7 [2023-12-20 10:49:59,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:49:59,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:50:00,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:50:00,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:50:00,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:50:00,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-20 10:50:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:50:00,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:50:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 15 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:50:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719303638] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:50:02,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:50:02,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 80 [2023-12-20 10:50:02,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070374406] [2023-12-20 10:50:02,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:50:02,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-12-20 10:50:02,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:50:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-12-20 10:50:02,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=5885, Unknown=0, NotChecked=0, Total=6320 [2023-12-20 10:50:02,778 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 80 states, 80 states have (on average 1.675) internal successors, (134), 80 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) [2023-12-20 10:50:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:50:11,826 INFO L93 Difference]: Finished difference Result 464 states and 565 transitions. [2023-12-20 10:50:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-12-20 10:50:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.675) internal successors, (134), 80 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) Word has length 54 [2023-12-20 10:50:11,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:50:11,828 INFO L225 Difference]: With dead ends: 464 [2023-12-20 10:50:11,828 INFO L226 Difference]: Without dead ends: 453 [2023-12-20 10:50:11,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10514 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2505, Invalid=31167, Unknown=0, NotChecked=0, Total=33672 [2023-12-20 10:50:11,831 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 359 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 5132 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 5648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 5132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-20 10:50:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 503 Invalid, 5648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 5132 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-20 10:50:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2023-12-20 10:50:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 217. [2023-12-20 10:50:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.2638888888888888) internal successors, (273), 216 states have internal predecessors, (273), 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) [2023-12-20 10:50:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 273 transitions. [2023-12-20 10:50:11,896 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 273 transitions. Word has length 54 [2023-12-20 10:50:11,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:50:11,896 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 273 transitions. [2023-12-20 10:50:11,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.675) internal successors, (134), 80 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) [2023-12-20 10:50:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 273 transitions. [2023-12-20 10:50:11,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 10:50:11,897 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:50:11,897 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:50:11,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 10:50:12,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 10:50:12,105 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:50:12,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:50:12,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1075128480, now seen corresponding path program 5 times [2023-12-20 10:50:12,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:50:12,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010518291] [2023-12-20 10:50:12,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:50:12,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:50:12,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:50:12,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892924800] [2023-12-20 10:50:12,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:50:12,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:50:12,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:50:12,120 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:50:12,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 10:50:13,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 10:50:13,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:50:13,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-20 10:50:13,407 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:50:13,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-12-20 10:50:13,492 INFO L349 Elim1Store]: treesize reduction 22, result has 38.9 percent of original size [2023-12-20 10:50:13,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2023-12-20 10:50:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-20 10:50:13,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:50:13,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2023-12-20 10:50:13,934 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-12-20 10:50:13,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2023-12-20 10:50:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 26 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-20 10:50:13,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:50:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010518291] [2023-12-20 10:50:13,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 10:50:13,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892924800] [2023-12-20 10:50:13,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892924800] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:50:13,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 10:50:13,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-12-20 10:50:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574651085] [2023-12-20 10:50:13,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 10:50:13,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 10:50:13,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:50:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 10:50:13,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-12-20 10:50:13,951 INFO L87 Difference]: Start difference. First operand 217 states and 273 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 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) [2023-12-20 10:50:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:50:14,709 INFO L93 Difference]: Finished difference Result 332 states and 419 transitions. [2023-12-20 10:50:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-20 10:50:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 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 54 [2023-12-20 10:50:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:50:14,711 INFO L225 Difference]: With dead ends: 332 [2023-12-20 10:50:14,711 INFO L226 Difference]: Without dead ends: 318 [2023-12-20 10:50:14,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2023-12-20 10:50:14,715 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 10:50:14,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 107 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 10:50:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-12-20 10:50:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 279. [2023-12-20 10:50:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.2697841726618706) internal successors, (353), 278 states have internal predecessors, (353), 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) [2023-12-20 10:50:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 353 transitions. [2023-12-20 10:50:14,794 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 353 transitions. Word has length 54 [2023-12-20 10:50:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:50:14,794 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 353 transitions. [2023-12-20 10:50:14,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 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) [2023-12-20 10:50:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 353 transitions. [2023-12-20 10:50:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-20 10:50:14,795 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:50:14,795 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:50:14,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 10:50:15,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-20 10:50:15,006 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:50:15,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:50:15,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1222261798, now seen corresponding path program 5 times [2023-12-20 10:50:15,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:50:15,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825640197] [2023-12-20 10:50:15,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:50:15,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:50:15,018 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 10:50:15,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208336774] [2023-12-20 10:50:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:50:15,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:50:15,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:50:15,020 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:50:15,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 10:50:16,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 10:50:16,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:50:16,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-20 10:50:16,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:50:16,805 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 13 treesize of output 9 [2023-12-20 10:50:16,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-12-20 10:50:16,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-20 10:50:16,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:50:16,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 25 [2023-12-20 10:50:16,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:50:16,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 32 treesize of output 34 [2023-12-20 10:50:16,977 INFO L349 Elim1Store]: treesize reduction 48, result has 57.1 percent of original size [2023-12-20 10:50:16,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 53 treesize of output 86 [2023-12-20 10:50:17,241 INFO L349 Elim1Store]: treesize reduction 48, result has 57.1 percent of original size [2023-12-20 10:50:17,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 107 treesize of output 122 [2023-12-20 10:50:17,659 INFO L349 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2023-12-20 10:50:17,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 165 treesize of output 134 [2023-12-20 10:50:18,189 INFO L349 Elim1Store]: treesize reduction 118, result has 23.4 percent of original size [2023-12-20 10:50:18,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 194 treesize of output 147 [2023-12-20 10:50:18,548 INFO L349 Elim1Store]: treesize reduction 96, result has 29.4 percent of original size [2023-12-20 10:50:18,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 146 treesize of output 134 [2023-12-20 10:50:19,058 INFO L349 Elim1Store]: treesize reduction 102, result has 21.5 percent of original size [2023-12-20 10:50:19,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 166 treesize of output 136 [2023-12-20 10:50:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 87 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-20 10:50:20,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:50:29,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 890 treesize of output 860