/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 16:18:33,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 16:18:33,980 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 16:18:33,985 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 16:18:33,986 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 16:18:34,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 16:18:34,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 16:18:34,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 16:18:34,019 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 16:18:34,023 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 16:18:34,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 16:18:34,024 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 16:18:34,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 16:18:34,026 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 16:18:34,026 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 16:18:34,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 16:18:34,026 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 16:18:34,026 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 16:18:34,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 16:18:34,027 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 16:18:34,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 16:18:34,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 16:18:34,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 16:18:34,028 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 16:18:34,028 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 16:18:34,028 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 16:18:34,028 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 16:18:34,029 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 16:18:34,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 16:18:34,029 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 16:18:34,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 16:18:34,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 16:18:34,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:34,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 16:18:34,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 16:18:34,031 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 16:18:34,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 16:18:34,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 16:18:34,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 16:18:34,032 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 16:18:34,032 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 16:18:34,032 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 16:18:34,032 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 16:18:34,032 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 16:18:34,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 16:18:34,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 16:18:34,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 16:18:34,282 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 16:18:34,282 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 16:18:34,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2023-12-18 16:18:35,461 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 16:18:35,632 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 16:18:35,633 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2023-12-18 16:18:35,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39cf89fc9/41104a87d2bf456b8c54bd0b6eeb9f4a/FLAG5b6681afa [2023-12-18 16:18:35,653 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39cf89fc9/41104a87d2bf456b8c54bd0b6eeb9f4a [2023-12-18 16:18:35,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 16:18:35,656 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 16:18:35,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:35,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 16:18:35,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 16:18:35,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e71c668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35, skipping insertion in model container [2023-12-18 16:18:35,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,681 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 16:18:35,789 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-examples/sanfoundry_10_ground.c[324,337] [2023-12-18 16:18:35,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:35,812 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 16:18:35,821 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-examples/sanfoundry_10_ground.c[324,337] [2023-12-18 16:18:35,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 16:18:35,839 INFO L206 MainTranslator]: Completed translation [2023-12-18 16:18:35,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35 WrapperNode [2023-12-18 16:18:35,840 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 16:18:35,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:35,841 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 16:18:35,841 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 16:18:35,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,852 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,868 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2023-12-18 16:18:35,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 16:18:35,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 16:18:35,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 16:18:35,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 16:18:35,877 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,879 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,889 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2023-12-18 16:18:35,889 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,889 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,894 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,898 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,899 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 16:18:35,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 16:18:35,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 16:18:35,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 16:18:35,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (1/1) ... [2023-12-18 16:18:35,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 16:18:35,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:35,936 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) [2023-12-18 16:18:35,937 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 [2023-12-18 16:18:35,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 16:18:35,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 16:18:35,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 16:18:35,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 16:18:35,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 16:18:35,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 16:18:35,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 16:18:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 16:18:35,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 16:18:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 16:18:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 16:18:36,032 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 16:18:36,034 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 16:18:36,159 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 16:18:36,188 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 16:18:36,188 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-18 16:18:36,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:36 BoogieIcfgContainer [2023-12-18 16:18:36,189 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 16:18:36,191 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 16:18:36,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 16:18:36,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 16:18:36,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 04:18:35" (1/3) ... [2023-12-18 16:18:36,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488fb63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:36, skipping insertion in model container [2023-12-18 16:18:36,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:18:35" (2/3) ... [2023-12-18 16:18:36,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488fb63e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:18:36, skipping insertion in model container [2023-12-18 16:18:36,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:18:36" (3/3) ... [2023-12-18 16:18:36,196 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2023-12-18 16:18:36,213 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 16:18:36,213 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 16:18:36,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 16:18:36,262 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;@2efd47a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 16:18:36,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 16:18:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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) [2023-12-18 16:18:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-18 16:18:36,272 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,274 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1901142431, now seen corresponding path program 1 times [2023-12-18 16:18:36,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14863995] [2023-12-18 16:18:36,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 16:18:36,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14863995] [2023-12-18 16:18:36,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14863995] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:36,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 16:18:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672637288] [2023-12-18 16:18:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:36,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:36,651 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-12-18 16:18:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,710 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2023-12-18 16:18:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2023-12-18 16:18:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,719 INFO L225 Difference]: With dead ends: 33 [2023-12-18 16:18:36,719 INFO L226 Difference]: Without dead ends: 15 [2023-12-18 16:18:36,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:36,727 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-18 16:18:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-18 16:18:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 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) [2023-12-18 16:18:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2023-12-18 16:18:36,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 9 [2023-12-18 16:18:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,761 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2023-12-18 16:18:36,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-12-18 16:18:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2023-12-18 16:18:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 16:18:36,762 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 16:18:36,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash -37017485, now seen corresponding path program 1 times [2023-12-18 16:18:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439993730] [2023-12-18 16:18:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:36,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:36,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439993730] [2023-12-18 16:18:36,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439993730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:36,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:36,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 16:18:36,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760812090] [2023-12-18 16:18:36,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:36,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 16:18:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 16:18:36,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 16:18:36,921 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-12-18 16:18:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:36,977 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2023-12-18 16:18:36,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 16:18:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-12-18 16:18:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:36,980 INFO L225 Difference]: With dead ends: 31 [2023-12-18 16:18:36,980 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 16:18:36,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 16:18:36,981 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:36,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 16:18:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-12-18 16:18:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2023-12-18 16:18:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-12-18 16:18:36,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2023-12-18 16:18:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:36,987 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-12-18 16:18:36,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-12-18 16:18:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-12-18 16:18:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 16:18:36,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:36,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:36,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 16:18:36,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:36,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -851183943, now seen corresponding path program 1 times [2023-12-18 16:18:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917409536] [2023-12-18 16:18:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:36,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917409536] [2023-12-18 16:18:37,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917409536] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 16:18:37,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 16:18:37,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-18 16:18:37,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707992115] [2023-12-18 16:18:37,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 16:18:37,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-18 16:18:37,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:37,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-18 16:18:37,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:37,095 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-12-18 16:18:37,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,119 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2023-12-18 16:18:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-18 16:18:37,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2023-12-18 16:18:37,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,121 INFO L225 Difference]: With dead ends: 28 [2023-12-18 16:18:37,122 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 16:18:37,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-18 16:18:37,125 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 16:18:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 16:18:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-18 16:18:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2023-12-18 16:18:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-12-18 16:18:37,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2023-12-18 16:18:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,131 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-12-18 16:18:37,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-12-18 16:18:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-12-18 16:18:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 16:18:37,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 16:18:37,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:37,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1058582699, now seen corresponding path program 1 times [2023-12-18 16:18:37,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:37,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643788753] [2023-12-18 16:18:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643788753] [2023-12-18 16:18:37,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643788753] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:37,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377770576] [2023-12-18 16:18:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:37,244 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) [2023-12-18 16:18:37,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 16:18:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 16:18:37,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 16:18:37,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377770576] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:37,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:37,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-12-18 16:18:37,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859774164] [2023-12-18 16:18:37,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 16:18:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 16:18:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-12-18 16:18:37,395 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2023-12-18 16:18:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:37,548 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-12-18 16:18:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-18 16:18:37,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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 14 [2023-12-18 16:18:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:37,550 INFO L225 Difference]: With dead ends: 70 [2023-12-18 16:18:37,550 INFO L226 Difference]: Without dead ends: 56 [2023-12-18 16:18:37,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2023-12-18 16:18:37,553 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:37,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-18 16:18:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 28. [2023-12-18 16:18:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 16:18:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-12-18 16:18:37,567 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 14 [2023-12-18 16:18:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:37,567 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-12-18 16:18:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 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) [2023-12-18 16:18:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-12-18 16:18:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-18 16:18:37,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:37,570 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:37,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 16:18:37,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,775 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:37,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 159487876, now seen corresponding path program 1 times [2023-12-18 16:18:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840845833] [2023-12-18 16:18:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:37,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-18 16:18:37,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840845833] [2023-12-18 16:18:37,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840845833] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945896923] [2023-12-18 16:18:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:37,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:37,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:37,917 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) [2023-12-18 16:18:37,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 16:18:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:37,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 16:18:37,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 16:18:38,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 16:18:38,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945896923] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:38,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:38,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-12-18 16:18:38,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012288364] [2023-12-18 16:18:38,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:38,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 16:18:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 16:18:38,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-12-18 16:18:38,168 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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) [2023-12-18 16:18:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:38,298 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2023-12-18 16:18:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 16:18:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 [2023-12-18 16:18:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:38,300 INFO L225 Difference]: With dead ends: 67 [2023-12-18 16:18:38,300 INFO L226 Difference]: Without dead ends: 36 [2023-12-18 16:18:38,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-12-18 16:18:38,302 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:38,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 62 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:38,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-18 16:18:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2023-12-18 16:18:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2023-12-18 16:18:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-12-18 16:18:38,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2023-12-18 16:18:38,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:38,314 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-12-18 16:18:38,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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) [2023-12-18 16:18:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-12-18 16:18:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 16:18:38,316 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:38,316 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:38,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:38,525 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:38,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2060541314, now seen corresponding path program 1 times [2023-12-18 16:18:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:38,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740564272] [2023-12-18 16:18:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:38,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:38,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740564272] [2023-12-18 16:18:38,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740564272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:38,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605759258] [2023-12-18 16:18:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:38,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:38,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:38,773 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) [2023-12-18 16:18:38,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 16:18:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:38,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-18 16:18:38,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:39,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:39,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605759258] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:39,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:39,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-12-18 16:18:39,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994407414] [2023-12-18 16:18:39,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:39,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 16:18:39,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 16:18:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 16:18:39,234 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 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) [2023-12-18 16:18:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:39,307 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2023-12-18 16:18:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 16:18:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 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 [2023-12-18 16:18:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:39,308 INFO L225 Difference]: With dead ends: 63 [2023-12-18 16:18:39,308 INFO L226 Difference]: Without dead ends: 47 [2023-12-18 16:18:39,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=550, Invalid=640, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 16:18:39,310 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:39,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-18 16:18:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-12-18 16:18:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2023-12-18 16:18:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-12-18 16:18:39,317 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 26 [2023-12-18 16:18:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:39,317 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-12-18 16:18:39,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 34 states have internal predecessors, (48), 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) [2023-12-18 16:18:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-12-18 16:18:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 16:18:39,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:39,318 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:39,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:39,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:39,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:39,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash -278712638, now seen corresponding path program 2 times [2023-12-18 16:18:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642958500] [2023-12-18 16:18:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:40,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:40,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642958500] [2023-12-18 16:18:40,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642958500] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:40,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960041662] [2023-12-18 16:18:40,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:18:40,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:40,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:40,112 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) [2023-12-18 16:18:40,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 16:18:40,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:18:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:40,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 16:18:40,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:40,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960041662] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:41,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:41,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2023-12-18 16:18:41,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330322005] [2023-12-18 16:18:41,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-18 16:18:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:41,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-18 16:18:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-12-18 16:18:41,468 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 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) [2023-12-18 16:18:41,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:41,580 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2023-12-18 16:18:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-18 16:18:41,581 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 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) Word has length 38 [2023-12-18 16:18:41,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:41,581 INFO L225 Difference]: With dead ends: 87 [2023-12-18 16:18:41,581 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 16:18:41,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2254, Invalid=2716, Unknown=0, NotChecked=0, Total=4970 [2023-12-18 16:18:41,584 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:41,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 88 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:41,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 16:18:41,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2023-12-18 16:18:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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) [2023-12-18 16:18:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-12-18 16:18:41,594 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 38 [2023-12-18 16:18:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:41,594 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-12-18 16:18:41,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 70 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) [2023-12-18 16:18:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-12-18 16:18:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 16:18:41,595 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:41,595 INFO L195 NwaCegarLoop]: trace histogram [46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:41,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:41,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:41,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:41,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash 939995458, now seen corresponding path program 3 times [2023-12-18 16:18:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:41,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322832347] [2023-12-18 16:18:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:41,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-18 16:18:43,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:43,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322832347] [2023-12-18 16:18:43,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322832347] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:43,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384200235] [2023-12-18 16:18:43,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:18:43,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:43,706 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) [2023-12-18 16:18:43,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 16:18:43,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 16:18:43,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:18:43,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 16:18:43,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-18 16:18:43,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2023-12-18 16:18:44,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384200235] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:44,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:44,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 5, 5] total 56 [2023-12-18 16:18:44,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474189671] [2023-12-18 16:18:44,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:44,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-18 16:18:44,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-18 16:18:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1396, Invalid=1796, Unknown=0, NotChecked=0, Total=3192 [2023-12-18 16:18:44,179 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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) [2023-12-18 16:18:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:49,017 INFO L93 Difference]: Finished difference Result 435 states and 542 transitions. [2023-12-18 16:18:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2023-12-18 16:18:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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 62 [2023-12-18 16:18:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:49,020 INFO L225 Difference]: With dead ends: 435 [2023-12-18 16:18:49,020 INFO L226 Difference]: Without dead ends: 419 [2023-12-18 16:18:49,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10609 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12550, Invalid=27250, Unknown=0, NotChecked=0, Total=39800 [2023-12-18 16:18:49,032 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 979 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:49,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 118 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 16:18:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-12-18 16:18:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 265. [2023-12-18 16:18:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.196969696969697) internal successors, (316), 264 states have internal predecessors, (316), 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) [2023-12-18 16:18:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 316 transitions. [2023-12-18 16:18:49,086 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 316 transitions. Word has length 62 [2023-12-18 16:18:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:49,086 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 316 transitions. [2023-12-18 16:18:49,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 56 states have internal predecessors, (86), 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) [2023-12-18 16:18:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 316 transitions. [2023-12-18 16:18:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 16:18:49,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:49,088 INFO L195 NwaCegarLoop]: trace histogram [49, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:49,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-18 16:18:49,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:49,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:49,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:49,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2082833861, now seen corresponding path program 1 times [2023-12-18 16:18:49,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:49,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977791690] [2023-12-18 16:18:49,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:49,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:18:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:18:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977791690] [2023-12-18 16:18:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977791690] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:18:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141090921] [2023-12-18 16:18:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:51,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:18:51,160 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) [2023-12-18 16:18:51,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 16:18:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:18:51,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-18 16:18:51,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:18:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:18:52,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:18:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:18:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141090921] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:18:55,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:18:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 151 [2023-12-18 16:18:55,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867815513] [2023-12-18 16:18:55,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:18:55,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2023-12-18 16:18:55,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:18:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2023-12-18 16:18:55,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10300, Invalid=12652, Unknown=0, NotChecked=0, Total=22952 [2023-12-18 16:18:55,350 INFO L87 Difference]: Start difference. First operand 265 states and 316 transitions. Second operand has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 states have internal predecessors, (166), 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) [2023-12-18 16:18:55,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:18:55,543 INFO L93 Difference]: Finished difference Result 538 states and 691 transitions. [2023-12-18 16:18:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-18 16:18:55,544 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 states have internal predecessors, (166), 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 69 [2023-12-18 16:18:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:18:55,545 INFO L225 Difference]: With dead ends: 538 [2023-12-18 16:18:55,545 INFO L226 Difference]: Without dead ends: 324 [2023-12-18 16:18:55,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=10300, Invalid=12652, Unknown=0, NotChecked=0, Total=22952 [2023-12-18 16:18:55,549 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 16:18:55,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 16:18:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-18 16:18:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 316. [2023-12-18 16:18:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.1650793650793652) internal successors, (367), 315 states have internal predecessors, (367), 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) [2023-12-18 16:18:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 367 transitions. [2023-12-18 16:18:55,586 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 367 transitions. Word has length 69 [2023-12-18 16:18:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:18:55,586 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 367 transitions. [2023-12-18 16:18:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 151 states have internal predecessors, (166), 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) [2023-12-18 16:18:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 367 transitions. [2023-12-18 16:18:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-18 16:18:55,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:18:55,588 INFO L195 NwaCegarLoop]: trace histogram [100, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:18:55,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 16:18:55,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:18:55,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:18:55,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:18:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash -314447804, now seen corresponding path program 2 times [2023-12-18 16:18:55,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:18:55,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173885653] [2023-12-18 16:18:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:18:55,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:18:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:19:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173885653] [2023-12-18 16:19:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173885653] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392877452] [2023-12-18 16:19:01,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:19:01,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:01,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:01,829 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) [2023-12-18 16:19:01,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 16:19:02,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:19:02,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:02,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 103 conjunts are in the unsatisfiable core [2023-12-18 16:19:02,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:19:06,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:19:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392877452] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:17,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 304 [2023-12-18 16:19:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584986359] [2023-12-18 16:19:17,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 305 states [2023-12-18 16:19:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 305 interpolants. [2023-12-18 16:19:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41410, Invalid=51310, Unknown=0, NotChecked=0, Total=92720 [2023-12-18 16:19:17,431 INFO L87 Difference]: Start difference. First operand 316 states and 367 transitions. Second operand has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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) [2023-12-18 16:19:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:19:18,014 INFO L93 Difference]: Finished difference Result 640 states and 844 transitions. [2023-12-18 16:19:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-12-18 16:19:18,015 INFO L78 Accepts]: Start accepts. Automaton has has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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 120 [2023-12-18 16:19:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:19:18,017 INFO L225 Difference]: With dead ends: 640 [2023-12-18 16:19:18,017 INFO L226 Difference]: Without dead ends: 426 [2023-12-18 16:19:18,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40499 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=41410, Invalid=51310, Unknown=0, NotChecked=0, Total=92720 [2023-12-18 16:19:18,022 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 16:19:18,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 16:19:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2023-12-18 16:19:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 418. [2023-12-18 16:19:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 1.1247002398081534) internal successors, (469), 417 states have internal predecessors, (469), 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) [2023-12-18 16:19:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 469 transitions. [2023-12-18 16:19:18,057 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 469 transitions. Word has length 120 [2023-12-18 16:19:18,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:19:18,058 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 469 transitions. [2023-12-18 16:19:18,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 305 states, 305 states have (on average 1.0459016393442624) internal successors, (319), 304 states have internal predecessors, (319), 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) [2023-12-18 16:19:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 469 transitions. [2023-12-18 16:19:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-12-18 16:19:18,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:19:18,061 INFO L195 NwaCegarLoop]: trace histogram [202, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:19:18,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 16:19:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:18,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:19:18,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:19:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2113666788, now seen corresponding path program 3 times [2023-12-18 16:19:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:19:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820034340] [2023-12-18 16:19:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:19:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:19:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:19:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20516 backedges. 0 proven. 20503 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-18 16:19:39,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:19:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820034340] [2023-12-18 16:19:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820034340] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:19:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943669766] [2023-12-18 16:19:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 16:19:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:19:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:19:39,573 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) [2023-12-18 16:19:39,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 16:19:39,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 16:19:39,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:19:39,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 16:19:39,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:19:40,941 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-12-18 16:19:40,942 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 1 case distinctions, treesize of input 28 treesize of output 16 [2023-12-18 16:19:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20516 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 20506 trivial. 0 not checked. [2023-12-18 16:19:41,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:19:43,597 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 22 treesize of output 18 [2023-12-18 16:19:43,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 16:19:43,604 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 30 treesize of output 24 [2023-12-18 16:19:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20516 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20506 trivial. 0 not checked. [2023-12-18 16:19:44,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943669766] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:19:44,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:19:44,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [204, 10, 10] total 222 [2023-12-18 16:19:44,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616858363] [2023-12-18 16:19:44,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:19:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 223 states [2023-12-18 16:19:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:19:44,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2023-12-18 16:19:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21398, Invalid=28108, Unknown=0, NotChecked=0, Total=49506 [2023-12-18 16:19:44,050 INFO L87 Difference]: Start difference. First operand 418 states and 469 transitions. Second operand has 223 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 222 states have internal predecessors, (253), 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) [2023-12-18 16:21:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:21:25,971 INFO L93 Difference]: Finished difference Result 1720 states and 1982 transitions. [2023-12-18 16:21:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2023-12-18 16:21:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 223 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 222 states have internal predecessors, (253), 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 222 [2023-12-18 16:21:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:21:25,979 INFO L225 Difference]: With dead ends: 1720 [2023-12-18 16:21:25,980 INFO L226 Difference]: Without dead ends: 1506 [2023-12-18 16:21:26,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1264 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 839 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195048 ImplicationChecksByTransitivity, 87.1s TimeCoverageRelationStatistics Valid=213981, Invalid=492459, Unknown=0, NotChecked=0, Total=706440 [2023-12-18 16:21:26,046 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4440 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 2095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4440 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2095 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-18 16:21:26,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4440 Valid, 102 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2095 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-18 16:21:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2023-12-18 16:21:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 426. [2023-12-18 16:21:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.1294117647058823) internal successors, (480), 425 states have internal predecessors, (480), 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) [2023-12-18 16:21:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 480 transitions. [2023-12-18 16:21:26,109 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 480 transitions. Word has length 222 [2023-12-18 16:21:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:21:26,109 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 480 transitions. [2023-12-18 16:21:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 223 states, 223 states have (on average 1.1345291479820627) internal successors, (253), 222 states have internal predecessors, (253), 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) [2023-12-18 16:21:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 480 transitions. [2023-12-18 16:21:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-12-18 16:21:26,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:21:26,111 INFO L195 NwaCegarLoop]: trace histogram [203, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:21:26,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 16:21:26,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-18 16:21:26,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:21:26,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:21:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1148532763, now seen corresponding path program 4 times [2023-12-18 16:21:26,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:21:26,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448230946] [2023-12-18 16:21:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:21:26,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:21:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:21:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20724 backedges. 0 proven. 20706 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 16:21:47,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:21:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448230946] [2023-12-18 16:21:47,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448230946] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:21:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181071813] [2023-12-18 16:21:47,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 16:21:47,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:21:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:21:47,745 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) [2023-12-18 16:21:47,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 16:21:48,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 16:21:48,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:21:48,089 WARN L260 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-18 16:21:48,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:21:48,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 16:21:48,858 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 37 treesize of output 15 [2023-12-18 16:21:48,957 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 16:21:48,958 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 1 case distinctions, treesize of input 32 treesize of output 12 [2023-12-18 16:21:49,058 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-12-18 16:21:49,058 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 1 case distinctions, treesize of input 32 treesize of output 12 [2023-12-18 16:21:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20724 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 20706 trivial. 0 not checked. [2023-12-18 16:21:49,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:22:00,851 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 60 treesize of output 52 [2023-12-18 16:22:00,870 INFO L349 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2023-12-18 16:22:00,871 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 351 treesize of output 235 [2023-12-18 16:22:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20724 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 20706 trivial. 0 not checked. [2023-12-18 16:22:00,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181071813] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:22:00,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:22:00,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [205, 15, 15] total 230 [2023-12-18 16:22:00,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535078106] [2023-12-18 16:22:00,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:22:00,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 230 states [2023-12-18 16:22:00,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:22:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2023-12-18 16:22:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21237, Invalid=31427, Unknown=6, NotChecked=0, Total=52670 [2023-12-18 16:22:00,931 INFO L87 Difference]: Start difference. First operand 426 states and 480 transitions. Second operand has 230 states, 230 states have (on average 1.117391304347826) internal successors, (257), 230 states have internal predecessors, (257), 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) [2023-12-18 16:22:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:22:06,255 INFO L93 Difference]: Finished difference Result 680 states and 793 transitions. [2023-12-18 16:22:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2023-12-18 16:22:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 230 states, 230 states have (on average 1.117391304347826) internal successors, (257), 230 states have internal predecessors, (257), 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 225 [2023-12-18 16:22:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:22:06,257 INFO L225 Difference]: With dead ends: 680 [2023-12-18 16:22:06,257 INFO L226 Difference]: Without dead ends: 459 [2023-12-18 16:22:06,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5339 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=21739, Invalid=40505, Unknown=6, NotChecked=0, Total=62250 [2023-12-18 16:22:06,262 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 202 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 16:22:06,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 74 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 16:22:06,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-12-18 16:22:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 422. [2023-12-18 16:22:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.1235154394299287) internal successors, (473), 421 states have internal predecessors, (473), 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) [2023-12-18 16:22:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 473 transitions. [2023-12-18 16:22:06,325 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 473 transitions. Word has length 225 [2023-12-18 16:22:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:22:06,326 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 473 transitions. [2023-12-18 16:22:06,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 230 states, 230 states have (on average 1.117391304347826) internal successors, (257), 230 states have internal predecessors, (257), 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) [2023-12-18 16:22:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 473 transitions. [2023-12-18 16:22:06,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-12-18 16:22:06,328 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:22:06,328 INFO L195 NwaCegarLoop]: trace histogram [204, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:22:06,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-18 16:22:06,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:22:06,532 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:22:06,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:22:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1492300560, now seen corresponding path program 1 times [2023-12-18 16:22:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:22:06,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613297247] [2023-12-18 16:22:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:22:06,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:22:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:22:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 16:22:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:22:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613297247] [2023-12-18 16:22:28,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613297247] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:22:28,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724565081] [2023-12-18 16:22:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:22:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:22:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:22:28,198 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) [2023-12-18 16:22:28,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 16:22:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:22:28,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 207 conjunts are in the unsatisfiable core [2023-12-18 16:22:28,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:22:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 16:22:45,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:23:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20925 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 16:23:32,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724565081] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:23:32,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:23:32,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [206, 206, 206] total 616 [2023-12-18 16:23:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442192129] [2023-12-18 16:23:32,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:23:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 617 states [2023-12-18 16:23:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:23:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 617 interpolants. [2023-12-18 16:23:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169330, Invalid=210742, Unknown=0, NotChecked=0, Total=380072 [2023-12-18 16:23:32,777 INFO L87 Difference]: Start difference. First operand 422 states and 473 transitions. Second operand has 617 states, 617 states have (on average 1.0259319286871962) internal successors, (633), 616 states have internal predecessors, (633), 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) [2023-12-18 16:23:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:23:36,023 INFO L93 Difference]: Finished difference Result 854 states and 1162 transitions. [2023-12-18 16:23:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2023-12-18 16:23:36,025 INFO L78 Accepts]: Start accepts. Automaton has has 617 states, 617 states have (on average 1.0259319286871962) internal successors, (633), 616 states have internal predecessors, (633), 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 227 [2023-12-18 16:23:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:23:36,027 INFO L225 Difference]: With dead ends: 854 [2023-12-18 16:23:36,027 INFO L226 Difference]: Without dead ends: 638 [2023-12-18 16:23:36,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 615 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167483 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=169330, Invalid=210742, Unknown=0, NotChecked=0, Total=380072 [2023-12-18 16:23:36,045 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 16:23:36,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 16:23:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2023-12-18 16:23:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 628. [2023-12-18 16:23:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.0829346092503986) internal successors, (679), 627 states have internal predecessors, (679), 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) [2023-12-18 16:23:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 679 transitions. [2023-12-18 16:23:36,136 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 679 transitions. Word has length 227 [2023-12-18 16:23:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:23:36,136 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 679 transitions. [2023-12-18 16:23:36,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 617 states, 617 states have (on average 1.0259319286871962) internal successors, (633), 616 states have internal predecessors, (633), 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) [2023-12-18 16:23:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 679 transitions. [2023-12-18 16:23:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2023-12-18 16:23:36,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:23:36,142 INFO L195 NwaCegarLoop]: trace histogram [410, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:23:36,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 16:23:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 16:23:36,352 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:23:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:23:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1042469680, now seen corresponding path program 2 times [2023-12-18 16:23:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:23:36,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959558497] [2023-12-18 16:23:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:23:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:23:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 16:25:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 84270 backedges. 0 proven. 84255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 16:25:06,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 16:25:06,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959558497] [2023-12-18 16:25:06,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959558497] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 16:25:06,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343360130] [2023-12-18 16:25:06,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 16:25:06,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 16:25:06,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 16:25:06,156 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) [2023-12-18 16:25:06,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 16:25:07,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 16:25:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 16:25:07,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 3798 conjuncts, 413 conjunts are in the unsatisfiable core [2023-12-18 16:25:07,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 16:26:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 84270 backedges. 0 proven. 84255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 16:26:11,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 16:29:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 84270 backedges. 0 proven. 84255 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-18 16:29:22,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343360130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 16:29:22,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 16:29:22,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [412, 412, 412] total 1234 [2023-12-18 16:29:22,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195772476] [2023-12-18 16:29:22,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 16:29:22,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1235 states [2023-12-18 16:29:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 16:29:22,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1235 interpolants. [2023-12-18 16:29:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678150, Invalid=845840, Unknown=0, NotChecked=0, Total=1523990 [2023-12-18 16:29:22,296 INFO L87 Difference]: Start difference. First operand 628 states and 679 transitions. Second operand has 1235 states, 1235 states have (on average 1.0129554655870445) internal successors, (1251), 1234 states have internal predecessors, (1251), 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) [2023-12-18 16:29:52,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 16:29:52,002 INFO L93 Difference]: Finished difference Result 1266 states and 1780 transitions. [2023-12-18 16:29:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 824 states. [2023-12-18 16:29:52,009 INFO L78 Accepts]: Start accepts. Automaton has has 1235 states, 1235 states have (on average 1.0129554655870445) internal successors, (1251), 1234 states have internal predecessors, (1251), 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 433 [2023-12-18 16:29:52,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 16:29:52,014 INFO L225 Difference]: With dead ends: 1266 [2023-12-18 16:29:52,014 INFO L226 Difference]: Without dead ends: 1050 [2023-12-18 16:29:52,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674449 ImplicationChecksByTransitivity, 313.7s TimeCoverageRelationStatistics Valid=678150, Invalid=845840, Unknown=0, NotChecked=0, Total=1523990 [2023-12-18 16:29:52,108 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-18 16:29:52,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-18 16:29:52,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2023-12-18 16:29:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1040. [2023-12-18 16:29:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 1.0500481231953802) internal successors, (1091), 1039 states have internal predecessors, (1091), 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) [2023-12-18 16:29:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1091 transitions. [2023-12-18 16:29:52,325 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1091 transitions. Word has length 433 [2023-12-18 16:29:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 16:29:52,325 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1091 transitions. [2023-12-18 16:29:52,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 1235 states, 1235 states have (on average 1.0129554655870445) internal successors, (1251), 1234 states have internal predecessors, (1251), 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) [2023-12-18 16:29:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1091 transitions. [2023-12-18 16:29:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2023-12-18 16:29:52,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 16:29:52,347 INFO L195 NwaCegarLoop]: trace histogram [822, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 16:29:52,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 16:29:52,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 16:29:52,562 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 16:29:52,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 16:29:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1416358768, now seen corresponding path program 3 times [2023-12-18 16:29:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 16:29:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675743252] [2023-12-18 16:29:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 16:29:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 16:29:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-12-18 16:31:32,942 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-18 16:31:33,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown