/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 00:50:09,143 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 00:50:09,196 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 00:50:09,202 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 00:50:09,203 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 00:50:09,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 00:50:09,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 00:50:09,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 00:50:09,219 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 00:50:09,220 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 00:50:09,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 00:50:09,220 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 00:50:09,220 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 00:50:09,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 00:50:09,221 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 00:50:09,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 00:50:09,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 00:50:09,222 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 00:50:09,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 00:50:09,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 00:50:09,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 00:50:09,225 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 00:50:09,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 00:50:09,226 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 00:50:09,226 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 00:50:09,226 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 00:50:09,226 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 00:50:09,227 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 00:50:09,227 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 00:50:09,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 00:50:09,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 00:50:09,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 00:50:09,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:50:09,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 00:50:09,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 00:50:09,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 00:50:09,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 00:50:09,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 00:50:09,229 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 00:50:09,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 00:50:09,229 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 00:50:09,232 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 00:50:09,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 00:50:09,233 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 00:50:09,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 00:50:09,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 00:50:09,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 00:50:09,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 00:50:09,435 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 00:50:09,436 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2023-12-16 00:50:10,356 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 00:50:10,741 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 00:50:10,742 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2023-12-16 00:50:10,766 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd75e3c53/cdde06c8f70048bc8a2633a2c4517f19/FLAG1f145f71e [2023-12-16 00:50:10,943 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd75e3c53/cdde06c8f70048bc8a2633a2c4517f19 [2023-12-16 00:50:10,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 00:50:10,946 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 00:50:10,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 00:50:10,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 00:50:10,952 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 00:50:10,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:50:10" (1/1) ... [2023-12-16 00:50:10,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48702b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:10, skipping insertion in model container [2023-12-16 00:50:10,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:50:10" (1/1) ... [2023-12-16 00:50:11,035 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 00:50:11,282 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[6487,6500] [2023-12-16 00:50:11,332 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[13423,13436] [2023-12-16 00:50:11,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:50:11,858 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 00:50:11,886 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[6487,6500] [2023-12-16 00:50:11,900 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c[13423,13436] [2023-12-16 00:50:12,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 00:50:12,239 INFO L206 MainTranslator]: Completed translation [2023-12-16 00:50:12,240 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12 WrapperNode [2023-12-16 00:50:12,240 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 00:50:12,241 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 00:50:12,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 00:50:12,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 00:50:12,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,499 INFO L138 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4981 [2023-12-16 00:50:12,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 00:50:12,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 00:50:12,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 00:50:12,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 00:50:12,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,554 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,819 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-16 00:50:12,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,836 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:12,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:13,015 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:13,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:13,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 00:50:13,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 00:50:13,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 00:50:13,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 00:50:13,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (1/1) ... [2023-12-16 00:50:13,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 00:50:13,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:13,111 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) [2023-12-16 00:50:13,175 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 [2023-12-16 00:50:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 00:50:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 00:50:13,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 00:50:13,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 00:50:13,307 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 00:50:13,308 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 00:50:16,898 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 00:50:16,934 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 00:50:16,934 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 00:50:16,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:50:16 BoogieIcfgContainer [2023-12-16 00:50:16,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 00:50:16,936 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 00:50:16,936 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 00:50:16,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 00:50:16,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:50:10" (1/3) ... [2023-12-16 00:50:16,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7de679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:50:16, skipping insertion in model container [2023-12-16 00:50:16,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:50:12" (2/3) ... [2023-12-16 00:50:16,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7de679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:50:16, skipping insertion in model container [2023-12-16 00:50:16,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:50:16" (3/3) ... [2023-12-16 00:50:16,940 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals+Problem12_label05.c [2023-12-16 00:50:16,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 00:50:16,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-12-16 00:50:17,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 00:50:17,057 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;@e7a6cb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 00:50:17,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-12-16 00:50:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 809 states, 806 states have (on average 1.978908188585608) internal successors, (1595), 808 states have internal predecessors, (1595), 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) [2023-12-16 00:50:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-16 00:50:17,125 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:17,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:17,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:17,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1258292883, now seen corresponding path program 1 times [2023-12-16 00:50:17,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:17,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364792063] [2023-12-16 00:50:17,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:17,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364792063] [2023-12-16 00:50:17,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364792063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:17,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:17,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 00:50:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319755435] [2023-12-16 00:50:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:17,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 00:50:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 00:50:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:50:17,580 INFO L87 Difference]: Start difference. First operand has 809 states, 806 states have (on average 1.978908188585608) internal successors, (1595), 808 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2023-12-16 00:50:17,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:17,718 INFO L93 Difference]: Finished difference Result 1597 states and 3151 transitions. [2023-12-16 00:50:17,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 00:50:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2023-12-16 00:50:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:17,735 INFO L225 Difference]: With dead ends: 1597 [2023-12-16 00:50:17,735 INFO L226 Difference]: Without dead ends: 805 [2023-12-16 00:50:17,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 00:50:17,745 INFO L413 NwaCegarLoop]: 1523 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:17,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1523 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:17,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-12-16 00:50:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2023-12-16 00:50:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 803 states have (on average 1.8978829389788294) internal successors, (1524), 804 states have internal predecessors, (1524), 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) [2023-12-16 00:50:17,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1524 transitions. [2023-12-16 00:50:17,819 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1524 transitions. Word has length 17 [2023-12-16 00:50:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:17,820 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1524 transitions. [2023-12-16 00:50:17,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2023-12-16 00:50:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1524 transitions. [2023-12-16 00:50:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-16 00:50:17,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:17,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:17,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 00:50:17,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:17,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:17,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1845098897, now seen corresponding path program 1 times [2023-12-16 00:50:17,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:17,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145124374] [2023-12-16 00:50:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:17,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145124374] [2023-12-16 00:50:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145124374] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:18,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 00:50:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370355619] [2023-12-16 00:50:18,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:50:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:50:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:50:18,073 INFO L87 Difference]: Start difference. First operand 805 states and 1524 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-12-16 00:50:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:18,126 INFO L93 Difference]: Finished difference Result 839 states and 1576 transitions. [2023-12-16 00:50:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:50:18,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2023-12-16 00:50:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:18,129 INFO L225 Difference]: With dead ends: 839 [2023-12-16 00:50:18,129 INFO L226 Difference]: Without dead ends: 805 [2023-12-16 00:50:18,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:50:18,130 INFO L413 NwaCegarLoop]: 1521 mSDtfsCounter, 0 mSDsluCounter, 3022 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4543 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:18,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4543 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2023-12-16 00:50:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 805. [2023-12-16 00:50:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 803 states have (on average 1.8779576587795765) internal successors, (1508), 804 states have internal predecessors, (1508), 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) [2023-12-16 00:50:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1508 transitions. [2023-12-16 00:50:18,141 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1508 transitions. Word has length 17 [2023-12-16 00:50:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:18,142 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1508 transitions. [2023-12-16 00:50:18,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-12-16 00:50:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1508 transitions. [2023-12-16 00:50:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-16 00:50:18,143 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:18,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 00:50:18,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:18,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash 249094943, now seen corresponding path program 1 times [2023-12-16 00:50:18,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:18,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775880030] [2023-12-16 00:50:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:18,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775880030] [2023-12-16 00:50:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775880030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:18,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:50:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221073834] [2023-12-16 00:50:18,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:18,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:50:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:50:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:50:18,311 INFO L87 Difference]: Start difference. First operand 805 states and 1508 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2023-12-16 00:50:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:18,447 INFO L93 Difference]: Finished difference Result 991 states and 1802 transitions. [2023-12-16 00:50:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-16 00:50:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) Word has length 32 [2023-12-16 00:50:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:18,451 INFO L225 Difference]: With dead ends: 991 [2023-12-16 00:50:18,451 INFO L226 Difference]: Without dead ends: 960 [2023-12-16 00:50:18,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-16 00:50:18,464 INFO L413 NwaCegarLoop]: 1499 mSDtfsCounter, 4669 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4669 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:18,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4669 Valid, 1742 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:50:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2023-12-16 00:50:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 834. [2023-12-16 00:50:18,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 832 states have (on average 1.8677884615384615) internal successors, (1554), 833 states have internal predecessors, (1554), 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) [2023-12-16 00:50:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1554 transitions. [2023-12-16 00:50:18,478 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1554 transitions. Word has length 32 [2023-12-16 00:50:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:18,478 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1554 transitions. [2023-12-16 00:50:18,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2023-12-16 00:50:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1554 transitions. [2023-12-16 00:50:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-16 00:50:18,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:18,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 00:50:18,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:18,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1262463601, now seen corresponding path program 1 times [2023-12-16 00:50:18,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:18,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686389975] [2023-12-16 00:50:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:18,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:18,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686389975] [2023-12-16 00:50:18,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686389975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:18,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:18,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320364508] [2023-12-16 00:50:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:18,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:18,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:18,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:18,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:18,581 INFO L87 Difference]: Start difference. First operand 834 states and 1554 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-12-16 00:50:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:18,617 INFO L93 Difference]: Finished difference Result 943 states and 1725 transitions. [2023-12-16 00:50:18,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-16 00:50:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:18,627 INFO L225 Difference]: With dead ends: 943 [2023-12-16 00:50:18,627 INFO L226 Difference]: Without dead ends: 883 [2023-12-16 00:50:18,628 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 [2023-12-16 00:50:18,632 INFO L413 NwaCegarLoop]: 1501 mSDtfsCounter, 1466 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:18,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1466 Valid, 1542 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-12-16 00:50:18,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 879. [2023-12-16 00:50:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 877 states have (on average 1.8494868871151653) internal successors, (1622), 878 states have internal predecessors, (1622), 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) [2023-12-16 00:50:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1622 transitions. [2023-12-16 00:50:18,646 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1622 transitions. Word has length 34 [2023-12-16 00:50:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:18,646 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1622 transitions. [2023-12-16 00:50:18,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-12-16 00:50:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1622 transitions. [2023-12-16 00:50:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-16 00:50:18,647 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:18,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:18,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-16 00:50:18,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:18,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1260318649, now seen corresponding path program 1 times [2023-12-16 00:50:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:18,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464773087] [2023-12-16 00:50:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:18,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464773087] [2023-12-16 00:50:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464773087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:18,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:18,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:50:18,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632058927] [2023-12-16 00:50:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:50:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:50:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:50:18,806 INFO L87 Difference]: Start difference. First operand 879 states and 1622 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-12-16 00:50:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:18,867 INFO L93 Difference]: Finished difference Result 986 states and 1786 transitions. [2023-12-16 00:50:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:50:18,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-16 00:50:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:18,870 INFO L225 Difference]: With dead ends: 986 [2023-12-16 00:50:18,870 INFO L226 Difference]: Without dead ends: 881 [2023-12-16 00:50:18,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-16 00:50:18,872 INFO L413 NwaCegarLoop]: 1500 mSDtfsCounter, 2948 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2948 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:18,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2948 Valid, 1591 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2023-12-16 00:50:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 879. [2023-12-16 00:50:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 877 states have (on average 1.847206385404789) internal successors, (1620), 878 states have internal predecessors, (1620), 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) [2023-12-16 00:50:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1620 transitions. [2023-12-16 00:50:18,887 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1620 transitions. Word has length 34 [2023-12-16 00:50:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:18,888 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1620 transitions. [2023-12-16 00:50:18,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-12-16 00:50:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1620 transitions. [2023-12-16 00:50:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-16 00:50:18,891 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:18,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:18,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-16 00:50:18,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:18,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash -543584939, now seen corresponding path program 1 times [2023-12-16 00:50:18,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:18,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569620786] [2023-12-16 00:50:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:18,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:19,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569620786] [2023-12-16 00:50:19,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569620786] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-16 00:50:19,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814204925] [2023-12-16 00:50:19,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:50:19,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:50:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:50:19,004 INFO L87 Difference]: Start difference. First operand 879 states and 1620 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-12-16 00:50:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,062 INFO L93 Difference]: Finished difference Result 887 states and 1629 transitions. [2023-12-16 00:50:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:50:19,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 35 [2023-12-16 00:50:19,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,066 INFO L225 Difference]: With dead ends: 887 [2023-12-16 00:50:19,066 INFO L226 Difference]: Without dead ends: 885 [2023-12-16 00:50:19,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:50:19,068 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 1 mSDsluCounter, 3000 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4504 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4504 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2023-12-16 00:50:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 883. [2023-12-16 00:50:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 881 states have (on average 1.8422247446083995) internal successors, (1623), 882 states have internal predecessors, (1623), 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) [2023-12-16 00:50:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1623 transitions. [2023-12-16 00:50:19,087 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1623 transitions. Word has length 35 [2023-12-16 00:50:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:19,087 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 1623 transitions. [2023-12-16 00:50:19,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2023-12-16 00:50:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1623 transitions. [2023-12-16 00:50:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-16 00:50:19,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:19,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:19,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-16 00:50:19,088 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:19,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:19,089 INFO L85 PathProgramCache]: Analyzing trace with hash -709644761, now seen corresponding path program 1 times [2023-12-16 00:50:19,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:19,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926120327] [2023-12-16 00:50:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:19,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:19,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926120327] [2023-12-16 00:50:19,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926120327] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:19,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596364271] [2023-12-16 00:50:19,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:19,117 INFO L87 Difference]: Start difference. First operand 883 states and 1623 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,138 INFO L93 Difference]: Finished difference Result 1085 states and 1923 transitions. [2023-12-16 00:50:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-16 00:50:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,141 INFO L225 Difference]: With dead ends: 1085 [2023-12-16 00:50:19,142 INFO L226 Difference]: Without dead ends: 976 [2023-12-16 00:50:19,143 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 [2023-12-16 00:50:19,144 INFO L413 NwaCegarLoop]: 1520 mSDtfsCounter, 1473 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 1577 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2023-12-16 00:50:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 974. [2023-12-16 00:50:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 972 states have (on average 1.8045267489711934) internal successors, (1754), 973 states have internal predecessors, (1754), 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) [2023-12-16 00:50:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1754 transitions. [2023-12-16 00:50:19,159 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1754 transitions. Word has length 36 [2023-12-16 00:50:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:19,160 INFO L495 AbstractCegarLoop]: Abstraction has 974 states and 1754 transitions. [2023-12-16 00:50:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1754 transitions. [2023-12-16 00:50:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-16 00:50:19,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:19,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-16 00:50:19,161 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:19,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1598378201, now seen corresponding path program 1 times [2023-12-16 00:50:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410607215] [2023-12-16 00:50:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:19,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410607215] [2023-12-16 00:50:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410607215] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139257340] [2023-12-16 00:50:19,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:19,191 INFO L87 Difference]: Start difference. First operand 974 states and 1754 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,213 INFO L93 Difference]: Finished difference Result 1342 states and 2288 transitions. [2023-12-16 00:50:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-16 00:50:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,217 INFO L225 Difference]: With dead ends: 1342 [2023-12-16 00:50:19,217 INFO L226 Difference]: Without dead ends: 1142 [2023-12-16 00:50:19,218 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 [2023-12-16 00:50:19,218 INFO L413 NwaCegarLoop]: 1530 mSDtfsCounter, 1475 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 1583 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2023-12-16 00:50:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1140. [2023-12-16 00:50:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1138 states have (on average 1.7434094903339192) internal successors, (1984), 1139 states have internal predecessors, (1984), 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) [2023-12-16 00:50:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1984 transitions. [2023-12-16 00:50:19,235 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1984 transitions. Word has length 36 [2023-12-16 00:50:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:19,236 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1984 transitions. [2023-12-16 00:50:19,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1984 transitions. [2023-12-16 00:50:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-16 00:50:19,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:19,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:19,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-16 00:50:19,237 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:19,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:19,238 INFO L85 PathProgramCache]: Analyzing trace with hash -566209588, now seen corresponding path program 1 times [2023-12-16 00:50:19,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:19,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792179661] [2023-12-16 00:50:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:19,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:19,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792179661] [2023-12-16 00:50:19,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792179661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:19,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134360647] [2023-12-16 00:50:19,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:19,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:19,277 INFO L87 Difference]: Start difference. First operand 1140 states and 1984 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-12-16 00:50:19,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,301 INFO L93 Difference]: Finished difference Result 1531 states and 2558 transitions. [2023-12-16 00:50:19,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:19,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 [2023-12-16 00:50:19,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,307 INFO L225 Difference]: With dead ends: 1531 [2023-12-16 00:50:19,307 INFO L226 Difference]: Without dead ends: 1312 [2023-12-16 00:50:19,309 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 [2023-12-16 00:50:19,310 INFO L413 NwaCegarLoop]: 1535 mSDtfsCounter, 1474 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 1584 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 1584 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2023-12-16 00:50:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1310. [2023-12-16 00:50:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1308 states have (on average 1.698776758409786) internal successors, (2222), 1309 states have internal predecessors, (2222), 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) [2023-12-16 00:50:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2222 transitions. [2023-12-16 00:50:19,336 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2222 transitions. Word has length 38 [2023-12-16 00:50:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:19,337 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 2222 transitions. [2023-12-16 00:50:19,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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) [2023-12-16 00:50:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2222 transitions. [2023-12-16 00:50:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 00:50:19,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:19,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:19,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-16 00:50:19,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:19,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1445833490, now seen corresponding path program 1 times [2023-12-16 00:50:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:19,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417375131] [2023-12-16 00:50:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:19,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 00:50:19,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417375131] [2023-12-16 00:50:19,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417375131] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:50:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925339101] [2023-12-16 00:50:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:50:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:50:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:50:19,474 INFO L87 Difference]: Start difference. First operand 1310 states and 2222 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,572 INFO L93 Difference]: Finished difference Result 3034 states and 4670 transitions. [2023-12-16 00:50:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:50:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-16 00:50:19,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,579 INFO L225 Difference]: With dead ends: 3034 [2023-12-16 00:50:19,580 INFO L226 Difference]: Without dead ends: 2500 [2023-12-16 00:50:19,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:50:19,581 INFO L413 NwaCegarLoop]: 1543 mSDtfsCounter, 3051 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3051 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3051 Valid, 3138 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2023-12-16 00:50:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 1842. [2023-12-16 00:50:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1840 states have (on average 1.6141304347826086) internal successors, (2970), 1841 states have internal predecessors, (2970), 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) [2023-12-16 00:50:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2970 transitions. [2023-12-16 00:50:19,617 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2970 transitions. Word has length 50 [2023-12-16 00:50:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:19,617 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2970 transitions. [2023-12-16 00:50:19,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2970 transitions. [2023-12-16 00:50:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-16 00:50:19,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:19,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:19,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-16 00:50:19,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:19,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:19,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1960400366, now seen corresponding path program 1 times [2023-12-16 00:50:19,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:19,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388912381] [2023-12-16 00:50:19,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:19,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-16 00:50:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388912381] [2023-12-16 00:50:19,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388912381] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:50:19,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362645142] [2023-12-16 00:50:19,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:50:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:50:19,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:50:19,675 INFO L87 Difference]: Start difference. First operand 1842 states and 2970 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,781 INFO L93 Difference]: Finished difference Result 3566 states and 5418 transitions. [2023-12-16 00:50:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:50:19,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-16 00:50:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,790 INFO L225 Difference]: With dead ends: 3566 [2023-12-16 00:50:19,791 INFO L226 Difference]: Without dead ends: 3032 [2023-12-16 00:50:19,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:50:19,794 INFO L413 NwaCegarLoop]: 1544 mSDtfsCounter, 3043 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3043 SdHoareTripleChecker+Valid, 3153 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3043 Valid, 3153 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2023-12-16 00:50:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2642. [2023-12-16 00:50:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2640 states have (on average 1.5462121212121211) internal successors, (4082), 2641 states have internal predecessors, (4082), 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) [2023-12-16 00:50:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4082 transitions. [2023-12-16 00:50:19,852 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4082 transitions. Word has length 50 [2023-12-16 00:50:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:19,853 INFO L495 AbstractCegarLoop]: Abstraction has 2642 states and 4082 transitions. [2023-12-16 00:50:19,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4082 transitions. [2023-12-16 00:50:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-16 00:50:19,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:19,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:19,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-16 00:50:19,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:19,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:19,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2001029718, now seen corresponding path program 1 times [2023-12-16 00:50:19,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:19,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722258509] [2023-12-16 00:50:19,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:19,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:19,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722258509] [2023-12-16 00:50:19,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722258509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:19,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:19,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539534552] [2023-12-16 00:50:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:19,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:19,924 INFO L87 Difference]: Start difference. First operand 2642 states and 4082 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-12-16 00:50:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:19,961 INFO L93 Difference]: Finished difference Result 4005 states and 6032 transitions. [2023-12-16 00:50:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:19,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 52 [2023-12-16 00:50:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:19,967 INFO L225 Difference]: With dead ends: 4005 [2023-12-16 00:50:19,967 INFO L226 Difference]: Without dead ends: 2139 [2023-12-16 00:50:19,969 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 [2023-12-16 00:50:19,970 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 34 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3020 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:19,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3020 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:19,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2023-12-16 00:50:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2137. [2023-12-16 00:50:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2135 states have (on average 1.5836065573770493) internal successors, (3381), 2136 states have internal predecessors, (3381), 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) [2023-12-16 00:50:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 3381 transitions. [2023-12-16 00:50:20,043 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 3381 transitions. Word has length 52 [2023-12-16 00:50:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:20,043 INFO L495 AbstractCegarLoop]: Abstraction has 2137 states and 3381 transitions. [2023-12-16 00:50:20,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-12-16 00:50:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 3381 transitions. [2023-12-16 00:50:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-16 00:50:20,044 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:20,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:20,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-16 00:50:20,044 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:20,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 626025683, now seen corresponding path program 1 times [2023-12-16 00:50:20,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:20,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56787090] [2023-12-16 00:50:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:20,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:50:20,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:20,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56787090] [2023-12-16 00:50:20,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56787090] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:20,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:20,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 00:50:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574211109] [2023-12-16 00:50:20,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:20,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 00:50:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 00:50:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:50:20,126 INFO L87 Difference]: Start difference. First operand 2137 states and 3381 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:20,211 INFO L93 Difference]: Finished difference Result 3297 states and 5041 transitions. [2023-12-16 00:50:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-16 00:50:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-16 00:50:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:20,220 INFO L225 Difference]: With dead ends: 3297 [2023-12-16 00:50:20,220 INFO L226 Difference]: Without dead ends: 2911 [2023-12-16 00:50:20,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-16 00:50:20,222 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 3043 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3043 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:20,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3043 Valid, 3138 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:20,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2023-12-16 00:50:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2521. [2023-12-16 00:50:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2521 states, 2519 states have (on average 1.5581579992060341) internal successors, (3925), 2520 states have internal predecessors, (3925), 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) [2023-12-16 00:50:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2521 states to 2521 states and 3925 transitions. [2023-12-16 00:50:20,275 INFO L78 Accepts]: Start accepts. Automaton has 2521 states and 3925 transitions. Word has length 52 [2023-12-16 00:50:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:20,275 INFO L495 AbstractCegarLoop]: Abstraction has 2521 states and 3925 transitions. [2023-12-16 00:50:20,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2521 states and 3925 transitions. [2023-12-16 00:50:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-16 00:50:20,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:20,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:20,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-16 00:50:20,276 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:20,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:20,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1629170632, now seen corresponding path program 1 times [2023-12-16 00:50:20,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:20,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289672465] [2023-12-16 00:50:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:20,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:20,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:20,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289672465] [2023-12-16 00:50:20,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289672465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:20,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:20,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:20,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177255997] [2023-12-16 00:50:20,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:20,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:20,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:20,335 INFO L87 Difference]: Start difference. First operand 2521 states and 3925 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-12-16 00:50:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:20,366 INFO L93 Difference]: Finished difference Result 3389 states and 5151 transitions. [2023-12-16 00:50:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2023-12-16 00:50:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:20,370 INFO L225 Difference]: With dead ends: 3389 [2023-12-16 00:50:20,370 INFO L226 Difference]: Without dead ends: 1659 [2023-12-16 00:50:20,372 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 [2023-12-16 00:50:20,372 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 29 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:20,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3005 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:20,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2023-12-16 00:50:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1657. [2023-12-16 00:50:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1655 states have (on average 1.6211480362537765) internal successors, (2683), 1656 states have internal predecessors, (2683), 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) [2023-12-16 00:50:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2683 transitions. [2023-12-16 00:50:20,400 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2683 transitions. Word has length 53 [2023-12-16 00:50:20,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:20,401 INFO L495 AbstractCegarLoop]: Abstraction has 1657 states and 2683 transitions. [2023-12-16 00:50:20,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2023-12-16 00:50:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2683 transitions. [2023-12-16 00:50:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-16 00:50:20,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:20,401 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:20,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-16 00:50:20,402 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:20,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1014743962, now seen corresponding path program 1 times [2023-12-16 00:50:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:20,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600313404] [2023-12-16 00:50:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600313404] [2023-12-16 00:50:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600313404] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:20,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:20,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:20,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399920600] [2023-12-16 00:50:20,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:20,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-16 00:50:20,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-16 00:50:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-16 00:50:20,446 INFO L87 Difference]: Start difference. First operand 1657 states and 2683 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:20,471 INFO L93 Difference]: Finished difference Result 2093 states and 3288 transitions. [2023-12-16 00:50:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-16 00:50:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-16 00:50:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:20,474 INFO L225 Difference]: With dead ends: 2093 [2023-12-16 00:50:20,474 INFO L226 Difference]: Without dead ends: 1227 [2023-12-16 00:50:20,475 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 [2023-12-16 00:50:20,476 INFO L413 NwaCegarLoop]: 1515 mSDtfsCounter, 26 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2990 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:20,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2990 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 00:50:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2023-12-16 00:50:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1225. [2023-12-16 00:50:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1223 states have (on average 1.6933769419460343) internal successors, (2071), 1224 states have internal predecessors, (2071), 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) [2023-12-16 00:50:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2071 transitions. [2023-12-16 00:50:20,495 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2071 transitions. Word has length 55 [2023-12-16 00:50:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:20,495 INFO L495 AbstractCegarLoop]: Abstraction has 1225 states and 2071 transitions. [2023-12-16 00:50:20,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2071 transitions. [2023-12-16 00:50:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-16 00:50:20,496 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:20,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:20,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-16 00:50:20,496 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:20,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1240304108, now seen corresponding path program 1 times [2023-12-16 00:50:20,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:20,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452644192] [2023-12-16 00:50:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:20,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:22,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452644192] [2023-12-16 00:50:22,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452644192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249874404] [2023-12-16 00:50:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:22,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:22,601 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) [2023-12-16 00:50:22,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 00:50:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:22,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-16 00:50:22,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:50:22,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 00:50:23,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249874404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:23,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:23,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 4] total 18 [2023-12-16 00:50:23,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362250743] [2023-12-16 00:50:23,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:23,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-16 00:50:23,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:23,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-16 00:50:23,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-12-16 00:50:23,026 INFO L87 Difference]: Start difference. First operand 1225 states and 2071 transitions. Second operand has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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) [2023-12-16 00:50:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:25,596 INFO L93 Difference]: Finished difference Result 3378 states and 4914 transitions. [2023-12-16 00:50:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-16 00:50:25,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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 57 [2023-12-16 00:50:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:25,604 INFO L225 Difference]: With dead ends: 3378 [2023-12-16 00:50:25,604 INFO L226 Difference]: Without dead ends: 2944 [2023-12-16 00:50:25,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=744, Invalid=2916, Unknown=0, NotChecked=0, Total=3660 [2023-12-16 00:50:25,606 INFO L413 NwaCegarLoop]: 1495 mSDtfsCounter, 15526 mSDsluCounter, 4739 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15526 SdHoareTripleChecker+Valid, 6234 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:25,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15526 Valid, 6234 Invalid, 609 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-16 00:50:25,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2023-12-16 00:50:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2786. [2023-12-16 00:50:25,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2784 states have (on average 1.4428879310344827) internal successors, (4017), 2785 states have internal predecessors, (4017), 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) [2023-12-16 00:50:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 4017 transitions. [2023-12-16 00:50:25,683 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 4017 transitions. Word has length 57 [2023-12-16 00:50:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:25,683 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 4017 transitions. [2023-12-16 00:50:25,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.722222222222221) internal successors, (157), 18 states have internal predecessors, (157), 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) [2023-12-16 00:50:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 4017 transitions. [2023-12-16 00:50:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-16 00:50:25,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:25,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:25,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-16 00:50:25,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-16 00:50:25,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:25,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1506068895, now seen corresponding path program 1 times [2023-12-16 00:50:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:25,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847620404] [2023-12-16 00:50:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:26,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847620404] [2023-12-16 00:50:26,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847620404] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:26,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034068963] [2023-12-16 00:50:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:26,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:26,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:26,640 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) [2023-12-16 00:50:26,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 00:50:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:26,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 00:50:26,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:27,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:27,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034068963] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:27,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:27,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2023-12-16 00:50:27,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091442976] [2023-12-16 00:50:27,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:27,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-16 00:50:27,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-16 00:50:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2023-12-16 00:50:27,715 INFO L87 Difference]: Start difference. First operand 2786 states and 4017 transitions. Second operand has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 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) [2023-12-16 00:50:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:28,571 INFO L93 Difference]: Finished difference Result 6754 states and 9033 transitions. [2023-12-16 00:50:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 00:50:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-16 00:50:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:28,593 INFO L225 Difference]: With dead ends: 6754 [2023-12-16 00:50:28,593 INFO L226 Difference]: Without dead ends: 5024 [2023-12-16 00:50:28,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1822, Unknown=0, NotChecked=0, Total=2352 [2023-12-16 00:50:28,597 INFO L413 NwaCegarLoop]: 1493 mSDtfsCounter, 19339 mSDsluCounter, 7683 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19339 SdHoareTripleChecker+Valid, 9176 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:28,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19339 Valid, 9176 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:50:28,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5024 states. [2023-12-16 00:50:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5024 to 4692. [2023-12-16 00:50:28,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4692 states, 4690 states have (on average 1.3562899786780385) internal successors, (6361), 4691 states have internal predecessors, (6361), 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) [2023-12-16 00:50:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 6361 transitions. [2023-12-16 00:50:28,815 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 6361 transitions. Word has length 58 [2023-12-16 00:50:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:28,816 INFO L495 AbstractCegarLoop]: Abstraction has 4692 states and 6361 transitions. [2023-12-16 00:50:28,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.8125) internal successors, (154), 32 states have internal predecessors, (154), 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) [2023-12-16 00:50:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 6361 transitions. [2023-12-16 00:50:28,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-16 00:50:28,819 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:28,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:28,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 00:50:29,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-16 00:50:29,025 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:29,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash 983464685, now seen corresponding path program 1 times [2023-12-16 00:50:29,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:29,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083439843] [2023-12-16 00:50:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083439843] [2023-12-16 00:50:29,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083439843] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907959004] [2023-12-16 00:50:29,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:29,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:29,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:29,225 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) [2023-12-16 00:50:29,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 00:50:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:29,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 00:50:29,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:29,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:30,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:30,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907959004] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:30,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:30,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 28 [2023-12-16 00:50:30,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32378260] [2023-12-16 00:50:30,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:30,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-16 00:50:30,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:30,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-16 00:50:30,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2023-12-16 00:50:30,332 INFO L87 Difference]: Start difference. First operand 4692 states and 6361 transitions. Second operand has 28 states, 28 states have (on average 5.357142857142857) internal successors, (150), 28 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:30,861 INFO L93 Difference]: Finished difference Result 9297 states and 12133 transitions. [2023-12-16 00:50:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-16 00:50:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.357142857142857) internal successors, (150), 28 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-16 00:50:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:30,875 INFO L225 Difference]: With dead ends: 9297 [2023-12-16 00:50:30,876 INFO L226 Difference]: Without dead ends: 5967 [2023-12-16 00:50:30,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=1211, Unknown=0, NotChecked=0, Total=1560 [2023-12-16 00:50:30,883 INFO L413 NwaCegarLoop]: 1492 mSDtfsCounter, 11961 mSDsluCounter, 6087 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11961 SdHoareTripleChecker+Valid, 7579 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:30,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11961 Valid, 7579 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 00:50:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5967 states. [2023-12-16 00:50:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5967 to 5785. [2023-12-16 00:50:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 5783 states have (on average 1.335638941725748) internal successors, (7724), 5784 states have internal predecessors, (7724), 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) [2023-12-16 00:50:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 7724 transitions. [2023-12-16 00:50:31,050 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 7724 transitions. Word has length 58 [2023-12-16 00:50:31,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:31,050 INFO L495 AbstractCegarLoop]: Abstraction has 5785 states and 7724 transitions. [2023-12-16 00:50:31,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.357142857142857) internal successors, (150), 28 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 7724 transitions. [2023-12-16 00:50:31,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-16 00:50:31,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:31,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:31,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 00:50:31,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-16 00:50:31,256 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:31,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:31,256 INFO L85 PathProgramCache]: Analyzing trace with hash -985944595, now seen corresponding path program 1 times [2023-12-16 00:50:31,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:31,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120903061] [2023-12-16 00:50:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:31,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:31,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:31,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120903061] [2023-12-16 00:50:31,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120903061] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:31,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496480499] [2023-12-16 00:50:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:31,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:31,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:31,621 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) [2023-12-16 00:50:31,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 00:50:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:31,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 00:50:31,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:32,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:32,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:32,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496480499] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:32,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 28 [2023-12-16 00:50:32,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469954744] [2023-12-16 00:50:32,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:32,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-16 00:50:32,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:32,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-16 00:50:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2023-12-16 00:50:32,973 INFO L87 Difference]: Start difference. First operand 5785 states and 7724 transitions. Second operand has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 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) [2023-12-16 00:50:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:33,606 INFO L93 Difference]: Finished difference Result 10441 states and 13512 transitions. [2023-12-16 00:50:33,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-16 00:50:33,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-16 00:50:33,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:33,616 INFO L225 Difference]: With dead ends: 10441 [2023-12-16 00:50:33,616 INFO L226 Difference]: Without dead ends: 6245 [2023-12-16 00:50:33,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2023-12-16 00:50:33,621 INFO L413 NwaCegarLoop]: 1500 mSDtfsCounter, 10650 mSDsluCounter, 7739 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10650 SdHoareTripleChecker+Valid, 9239 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:33,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10650 Valid, 9239 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:50:33,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6245 states. [2023-12-16 00:50:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6245 to 5853. [2023-12-16 00:50:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5853 states, 5851 states have (on average 1.3278072124423175) internal successors, (7769), 5852 states have internal predecessors, (7769), 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) [2023-12-16 00:50:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5853 states to 5853 states and 7769 transitions. [2023-12-16 00:50:33,758 INFO L78 Accepts]: Start accepts. Automaton has 5853 states and 7769 transitions. Word has length 58 [2023-12-16 00:50:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:33,758 INFO L495 AbstractCegarLoop]: Abstraction has 5853 states and 7769 transitions. [2023-12-16 00:50:33,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.178571428571429) internal successors, (145), 28 states have internal predecessors, (145), 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) [2023-12-16 00:50:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 5853 states and 7769 transitions. [2023-12-16 00:50:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-16 00:50:33,759 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:33,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:33,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 00:50:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:33,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:33,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash -171888270, now seen corresponding path program 1 times [2023-12-16 00:50:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226887268] [2023-12-16 00:50:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:33,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:34,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226887268] [2023-12-16 00:50:34,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226887268] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:34,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770826896] [2023-12-16 00:50:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:34,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:34,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:34,515 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) [2023-12-16 00:50:34,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 00:50:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:34,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-16 00:50:34,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:35,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:36,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770826896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:36,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:36,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2023-12-16 00:50:36,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811034252] [2023-12-16 00:50:36,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:36,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-16 00:50:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-16 00:50:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2023-12-16 00:50:36,017 INFO L87 Difference]: Start difference. First operand 5853 states and 7769 transitions. Second operand has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 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) [2023-12-16 00:50:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:40,766 INFO L93 Difference]: Finished difference Result 11747 states and 15083 transitions. [2023-12-16 00:50:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-12-16 00:50:40,766 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-16 00:50:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:40,777 INFO L225 Difference]: With dead ends: 11747 [2023-12-16 00:50:40,778 INFO L226 Difference]: Without dead ends: 8723 [2023-12-16 00:50:40,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3199 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2207, Invalid=9135, Unknown=0, NotChecked=0, Total=11342 [2023-12-16 00:50:40,784 INFO L413 NwaCegarLoop]: 1513 mSDtfsCounter, 10742 mSDsluCounter, 20171 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10742 SdHoareTripleChecker+Valid, 21684 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:40,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10742 Valid, 21684 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-16 00:50:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8723 states. [2023-12-16 00:50:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8723 to 4620. [2023-12-16 00:50:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 4618 states have (on average 1.3471199653529666) internal successors, (6221), 4619 states have internal predecessors, (6221), 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) [2023-12-16 00:50:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6221 transitions. [2023-12-16 00:50:40,918 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6221 transitions. Word has length 59 [2023-12-16 00:50:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:40,919 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 6221 transitions. [2023-12-16 00:50:40,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 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) [2023-12-16 00:50:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6221 transitions. [2023-12-16 00:50:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-16 00:50:40,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:40,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:40,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-16 00:50:41,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:41,125 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:41,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1020930071, now seen corresponding path program 1 times [2023-12-16 00:50:41,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:41,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862238993] [2023-12-16 00:50:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:41,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:41,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:41,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862238993] [2023-12-16 00:50:41,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862238993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 00:50:41,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 00:50:41,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-16 00:50:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409362889] [2023-12-16 00:50:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 00:50:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-16 00:50:41,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:41,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-16 00:50:41,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-16 00:50:41,196 INFO L87 Difference]: Start difference. First operand 4620 states and 6221 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:46,251 INFO L93 Difference]: Finished difference Result 6875 states and 10530 transitions. [2023-12-16 00:50:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-16 00:50:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-16 00:50:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:46,274 INFO L225 Difference]: With dead ends: 6875 [2023-12-16 00:50:46,274 INFO L226 Difference]: Without dead ends: 6122 [2023-12-16 00:50:46,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-16 00:50:46,278 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 2320 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5521 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2320 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 6621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:46,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2320 Valid, 777 Invalid, 6621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5521 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-16 00:50:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2023-12-16 00:50:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 6122. [2023-12-16 00:50:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 6120 states have (on average 1.363888888888889) internal successors, (8347), 6121 states have internal predecessors, (8347), 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) [2023-12-16 00:50:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 8347 transitions. [2023-12-16 00:50:46,446 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 8347 transitions. Word has length 59 [2023-12-16 00:50:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:46,446 INFO L495 AbstractCegarLoop]: Abstraction has 6122 states and 8347 transitions. [2023-12-16 00:50:46,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 00:50:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 8347 transitions. [2023-12-16 00:50:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-16 00:50:46,447 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:46,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:46,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-16 00:50:46,447 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:46,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash 236649807, now seen corresponding path program 1 times [2023-12-16 00:50:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706183179] [2023-12-16 00:50:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:46,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:46,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:46,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706183179] [2023-12-16 00:50:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706183179] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:46,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600229440] [2023-12-16 00:50:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:46,990 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) [2023-12-16 00:50:46,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 00:50:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:47,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-16 00:50:47,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:47,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600229440] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:48,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:48,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2023-12-16 00:50:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402257999] [2023-12-16 00:50:48,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:48,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-16 00:50:48,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:48,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-16 00:50:48,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2023-12-16 00:50:48,467 INFO L87 Difference]: Start difference. First operand 6122 states and 8347 transitions. Second operand has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 31 states have internal predecessors, (142), 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) [2023-12-16 00:50:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:49,573 INFO L93 Difference]: Finished difference Result 6932 states and 9354 transitions. [2023-12-16 00:50:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-16 00:50:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 31 states have internal predecessors, (142), 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 60 [2023-12-16 00:50:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:49,579 INFO L225 Difference]: With dead ends: 6932 [2023-12-16 00:50:49,579 INFO L226 Difference]: Without dead ends: 4489 [2023-12-16 00:50:49,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=533, Invalid=1819, Unknown=0, NotChecked=0, Total=2352 [2023-12-16 00:50:49,582 INFO L413 NwaCegarLoop]: 1493 mSDtfsCounter, 13963 mSDsluCounter, 11906 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13963 SdHoareTripleChecker+Valid, 13399 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:49,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13963 Valid, 13399 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 00:50:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4489 states. [2023-12-16 00:50:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4489 to 4413. [2023-12-16 00:50:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4411 states have (on average 1.4150986170936295) internal successors, (6242), 4412 states have internal predecessors, (6242), 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) [2023-12-16 00:50:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6242 transitions. [2023-12-16 00:50:49,670 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6242 transitions. Word has length 60 [2023-12-16 00:50:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:49,671 INFO L495 AbstractCegarLoop]: Abstraction has 4413 states and 6242 transitions. [2023-12-16 00:50:49,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 31 states have internal predecessors, (142), 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) [2023-12-16 00:50:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6242 transitions. [2023-12-16 00:50:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-16 00:50:49,672 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:49,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:49,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-16 00:50:49,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:49,885 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:49,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1767313277, now seen corresponding path program 1 times [2023-12-16 00:50:49,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:49,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146052209] [2023-12-16 00:50:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:49,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:50,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:50,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146052209] [2023-12-16 00:50:50,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146052209] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:50,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851376621] [2023-12-16 00:50:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:50,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:50,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:50,588 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) [2023-12-16 00:50:50,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 00:50:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:50,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-16 00:50:50,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:51,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:50:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:52,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851376621] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:50:52,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:50:52,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 31 [2023-12-16 00:50:52,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677453853] [2023-12-16 00:50:52,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:50:52,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-16 00:50:52,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:50:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-16 00:50:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2023-12-16 00:50:52,623 INFO L87 Difference]: Start difference. First operand 4413 states and 6242 transitions. Second operand has 32 states, 32 states have (on average 7.125) internal successors, (228), 31 states have internal predecessors, (228), 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) [2023-12-16 00:50:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 00:50:54,281 INFO L93 Difference]: Finished difference Result 5671 states and 7807 transitions. [2023-12-16 00:50:54,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-16 00:50:54,282 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 7.125) internal successors, (228), 31 states have internal predecessors, (228), 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 97 [2023-12-16 00:50:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 00:50:54,301 INFO L225 Difference]: With dead ends: 5671 [2023-12-16 00:50:54,301 INFO L226 Difference]: Without dead ends: 4495 [2023-12-16 00:50:54,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=855, Invalid=3051, Unknown=0, NotChecked=0, Total=3906 [2023-12-16 00:50:54,306 INFO L413 NwaCegarLoop]: 1532 mSDtfsCounter, 19663 mSDsluCounter, 12303 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19663 SdHoareTripleChecker+Valid, 13835 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-16 00:50:54,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19663 Valid, 13835 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-16 00:50:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2023-12-16 00:50:54,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4413. [2023-12-16 00:50:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4411 states have (on average 1.411017909771027) internal successors, (6224), 4412 states have internal predecessors, (6224), 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) [2023-12-16 00:50:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6224 transitions. [2023-12-16 00:50:54,418 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6224 transitions. Word has length 97 [2023-12-16 00:50:54,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 00:50:54,418 INFO L495 AbstractCegarLoop]: Abstraction has 4413 states and 6224 transitions. [2023-12-16 00:50:54,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 7.125) internal successors, (228), 31 states have internal predecessors, (228), 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) [2023-12-16 00:50:54,418 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6224 transitions. [2023-12-16 00:50:54,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-12-16 00:50:54,419 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 00:50:54,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:50:54,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-16 00:50:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:54,624 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 00:50:54,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 00:50:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash -350030467, now seen corresponding path program 1 times [2023-12-16 00:50:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 00:50:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725369209] [2023-12-16 00:50:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 00:50:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 19 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:55,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 00:50:55,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725369209] [2023-12-16 00:50:55,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725369209] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 00:50:55,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387779286] [2023-12-16 00:50:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 00:50:55,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 00:50:55,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 00:50:55,475 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) [2023-12-16 00:50:55,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-16 00:50:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 00:50:55,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-16 00:50:55,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 00:50:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:50:57,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 00:51:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 00:51:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387779286] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 00:51:01,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-16 00:51:01,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 20] total 52 [2023-12-16 00:51:01,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059318768] [2023-12-16 00:51:01,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-16 00:51:01,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-16 00:51:01,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 00:51:01,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-16 00:51:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2023-12-16 00:51:01,195 INFO L87 Difference]: Start difference. First operand 4413 states and 6224 transitions. Second operand has 52 states, 52 states have (on average 5.134615384615385) internal successors, (267), 52 states have internal predecessors, (267), 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) Received shutdown request... [2023-12-16 00:51:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-12-16 00:51:15,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5735 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2535, Invalid=18345, Unknown=0, NotChecked=0, Total=20880 [2023-12-16 00:51:15,949 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 3168 mSDsluCounter, 2782 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3168 SdHoareTripleChecker+Valid, 2920 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-16 00:51:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3168 Valid, 2920 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-16 00:51:15,950 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-12-16 00:51:15,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-16 00:51:15,966 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 [2023-12-16 00:51:15,970 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 00:51:16,155 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,SelfDestructingSolverStorable23 [2023-12-16 00:51:16,156 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (4413states) and FLOYD_HOARE automaton (currently 95 states, 52 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-14-4-3-2-2-3-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ∨-3-1 context. [2023-12-16 00:51:16,158 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-12-16 00:51:16,160 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 00:51:16,162 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 00:51:16,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 12:51:16 BoogieIcfgContainer [2023-12-16 00:51:16,167 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 00:51:16,171 INFO L158 Benchmark]: Toolchain (without parser) took 65224.70ms. Allocated memory was 198.2MB in the beginning and 1.6GB in the end (delta: 1.4GB). Free memory was 120.3MB in the beginning and 1.1GB in the end (delta: -971.6MB). Peak memory consumption was 413.4MB. Max. memory is 8.0GB. [2023-12-16 00:51:16,172 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 198.2MB. Free memory was 148.1MB in the beginning and 147.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 00:51:16,173 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1293.51ms. Allocated memory was 198.2MB in the beginning and 266.3MB in the end (delta: 68.2MB). Free memory was 120.2MB in the beginning and 167.5MB in the end (delta: -47.3MB). Peak memory consumption was 74.3MB. Max. memory is 8.0GB. [2023-12-16 00:51:16,173 INFO L158 Benchmark]: Boogie Procedure Inliner took 258.24ms. Allocated memory is still 266.3MB. Free memory was 167.5MB in the beginning and 160.2MB in the end (delta: 7.3MB). Peak memory consumption was 93.8MB. Max. memory is 8.0GB. [2023-12-16 00:51:16,174 INFO L158 Benchmark]: Boogie Preprocessor took 580.71ms. Allocated memory was 266.3MB in the beginning and 524.3MB in the end (delta: 257.9MB). Free memory was 160.2MB in the beginning and 369.2MB in the end (delta: -209.0MB). Peak memory consumption was 63.6MB. Max. memory is 8.0GB. [2023-12-16 00:51:16,176 INFO L158 Benchmark]: RCFGBuilder took 3852.54ms. Allocated memory was 524.3MB in the beginning and 915.4MB in the end (delta: 391.1MB). Free memory was 369.2MB in the beginning and 436.0MB in the end (delta: -66.8MB). Peak memory consumption was 326.4MB. Max. memory is 8.0GB. [2023-12-16 00:51:16,178 INFO L158 Benchmark]: TraceAbstraction took 59234.65ms. Allocated memory was 915.4MB in the beginning and 1.6GB in the end (delta: 665.8MB). Free memory was 435.5MB in the beginning and 1.1GB in the end (delta: -656.5MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2023-12-16 00:51:16,183 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 198.2MB. Free memory was 148.1MB in the beginning and 147.9MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 1293.51ms. Allocated memory was 198.2MB in the beginning and 266.3MB in the end (delta: 68.2MB). Free memory was 120.2MB in the beginning and 167.5MB in the end (delta: -47.3MB). Peak memory consumption was 74.3MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 258.24ms. Allocated memory is still 266.3MB. Free memory was 167.5MB in the beginning and 160.2MB in the end (delta: 7.3MB). Peak memory consumption was 93.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 580.71ms. Allocated memory was 266.3MB in the beginning and 524.3MB in the end (delta: 257.9MB). Free memory was 160.2MB in the beginning and 369.2MB in the end (delta: -209.0MB). Peak memory consumption was 63.6MB. Max. memory is 8.0GB. * RCFGBuilder took 3852.54ms. Allocated memory was 524.3MB in the beginning and 915.4MB in the end (delta: 391.1MB). Free memory was 369.2MB in the beginning and 436.0MB in the end (delta: -66.8MB). Peak memory consumption was 326.4MB. Max. memory is 8.0GB. * TraceAbstraction took 59234.65ms. Allocated memory was 915.4MB in the beginning and 1.6GB in the end (delta: 665.8MB). Free memory was 435.5MB in the beginning and 1.1GB in the end (delta: -656.5MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 297]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 297). Cancelled while NwaCegarLoop was constructing difference of abstraction (4413states) and FLOYD_HOARE automaton (currently 95 states, 52 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-14-4-3-2-2-3-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ∨-3-1 context. - TimeoutResultAtElement [Line: 492]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 492). Cancelled while NwaCegarLoop was constructing difference of abstraction (4413states) and FLOYD_HOARE automaton (currently 95 states, 52 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-14-4-3-2-2-3-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ∨-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 809 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 59.1s, OverallIterations: 24, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 33.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 130064 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 130064 mSDsluCounter, 123476 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 89234 mSDsCounter, 1562 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12637 IncrementalHoareTripleChecker+Invalid, 14199 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1562 mSolverCounterUnsat, 34242 mSDtfsCounter, 12637 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1549 GetRequests, 966 SyntacticMatches, 2 SemanticMatches, 580 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12330 ImplicationChecksByTransitivity, 26.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6122occurred in iteration=21, InterpolantAutomatonStates: 296, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 23 MinimizatonAttempts, 6909 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 20.7s InterpolantComputationTime, 1738 NumberOfCodeBlocks, 1738 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2242 ConstructedInterpolants, 0 QuantifiedInterpolants, 35194 SizeOfPredicates, 55 NumberOfNonLiveVariables, 2585 ConjunctsInSsa, 165 ConjunctsInUnsatCore, 40 InterpolantComputations, 16 PerfectInterpolantSequences, 391/786 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown