/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:10:13,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:10:13,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:10:13,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:10:13,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:10:13,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:10:13,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:10:13,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 01:10:13,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:10:13,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:10:13,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:10:13,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:10:13,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:10:13,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:10:13,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:10:13,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:10:13,129 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:10:13,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:10:13,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:10:13,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:10:13,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:10:13,131 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:10:13,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:10:13,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:10:13,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:10:13,290 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:10:13,291 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:10:13,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2022-01-10 01:10:13,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cd32fc2/25507761162442b8a558ab1fa843e203/FLAG57d5f7829 [2022-01-10 01:10:13,790 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:10:13,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c [2022-01-10 01:10:13,800 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cd32fc2/25507761162442b8a558ab1fa843e203/FLAG57d5f7829 [2022-01-10 01:10:14,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3cd32fc2/25507761162442b8a558ab1fa843e203 [2022-01-10 01:10:14,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:10:14,093 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:10:14,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:10:14,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:10:14,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:10:14,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fcbc4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14, skipping insertion in model container [2022-01-10 01:10:14,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:10:14,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:10:14,363 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2022-01-10 01:10:14,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:10:14,371 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:10:14,404 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.ufo.UNBOUNDED.pals.c[12966,12979] [2022-01-10 01:10:14,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:10:14,415 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:10:14,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14 WrapperNode [2022-01-10 01:10:14,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:10:14,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:10:14,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:10:14,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:10:14,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,479 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 443 [2022-01-10 01:10:14,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:10:14,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:10:14,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:10:14,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:10:14,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:10:14,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:10:14,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:10:14,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:10:14,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (1/1) ... [2022-01-10 01:10:14,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:10:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:10:14,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 01:10:14,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 01:10:14,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:10:14,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:10:14,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:10:14,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:10:14,652 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:10:14,654 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:10:14,978 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:10:14,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:10:14,984 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 01:10:14,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:10:14 BoogieIcfgContainer [2022-01-10 01:10:14,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:10:14,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:10:14,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:10:14,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:10:14,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:10:14" (1/3) ... [2022-01-10 01:10:14,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8c0c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:10:14, skipping insertion in model container [2022-01-10 01:10:14,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:10:14" (2/3) ... [2022-01-10 01:10:14,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8c0c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:10:14, skipping insertion in model container [2022-01-10 01:10:14,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:10:14" (3/3) ... [2022-01-10 01:10:14,995 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c [2022-01-10 01:10:14,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:10:14,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:10:15,030 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:10:15,034 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 01:10:15,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:10:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 01:10:15,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:15,066 INFO L514 BasicCegarLoop]: 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] [2022-01-10 01:10:15,067 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:15,071 INFO L85 PathProgramCache]: Analyzing trace with hash 298975739, now seen corresponding path program 1 times [2022-01-10 01:10:15,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:15,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173053289] [2022-01-10 01:10:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:15,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:15,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:15,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173053289] [2022-01-10 01:10:15,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173053289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:15,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:15,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 01:10:15,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922582009] [2022-01-10 01:10:15,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:15,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 01:10:15,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:15,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 01:10:15,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 01:10:15,311 INFO L87 Difference]: Start difference. First operand has 137 states, 135 states have (on average 1.7481481481481482) internal successors, (236), 136 states have internal predecessors, (236), 0 states have call successors, (0), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:15,341 INFO L93 Difference]: Finished difference Result 214 states and 367 transitions. [2022-01-10 01:10:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 01:10:15,343 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 01:10:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:15,353 INFO L225 Difference]: With dead ends: 214 [2022-01-10 01:10:15,353 INFO L226 Difference]: Without dead ends: 133 [2022-01-10 01:10:15,356 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:15,358 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:15,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-10 01:10:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-01-10 01:10:15,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.7348484848484849) internal successors, (229), 132 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 229 transitions. [2022-01-10 01:10:15,402 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 229 transitions. Word has length 37 [2022-01-10 01:10:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:15,403 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 229 transitions. [2022-01-10 01:10:15,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 229 transitions. [2022-01-10 01:10:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 01:10:15,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:15,406 INFO L514 BasicCegarLoop]: 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] [2022-01-10 01:10:15,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:10:15,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:15,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:15,409 INFO L85 PathProgramCache]: Analyzing trace with hash -518672711, now seen corresponding path program 1 times [2022-01-10 01:10:15,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:15,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595066208] [2022-01-10 01:10:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:15,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:15,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:15,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595066208] [2022-01-10 01:10:15,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595066208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:15,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:15,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:15,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116069392] [2022-01-10 01:10:15,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:15,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:15,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:15,533 INFO L87 Difference]: Start difference. First operand 133 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:15,613 INFO L93 Difference]: Finished difference Result 213 states and 360 transitions. [2022-01-10 01:10:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:10:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 01:10:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:15,615 INFO L225 Difference]: With dead ends: 213 [2022-01-10 01:10:15,615 INFO L226 Difference]: Without dead ends: 133 [2022-01-10 01:10:15,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:10:15,616 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 3 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:15,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 878 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-10 01:10:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-01-10 01:10:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.5303030303030303) internal successors, (202), 132 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 202 transitions. [2022-01-10 01:10:15,624 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 202 transitions. Word has length 37 [2022-01-10 01:10:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:15,625 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 202 transitions. [2022-01-10 01:10:15,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 202 transitions. [2022-01-10 01:10:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 01:10:15,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:15,626 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1] [2022-01-10 01:10:15,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:10:15,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash -707453694, now seen corresponding path program 1 times [2022-01-10 01:10:15,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528194318] [2022-01-10 01:10:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:15,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:15,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:15,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528194318] [2022-01-10 01:10:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528194318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:15,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:15,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:15,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596748473] [2022-01-10 01:10:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:15,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:15,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:15,683 INFO L87 Difference]: Start difference. First operand 133 states and 202 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:15,713 INFO L93 Difference]: Finished difference Result 276 states and 439 transitions. [2022-01-10 01:10:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:15,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-01-10 01:10:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:15,715 INFO L225 Difference]: With dead ends: 276 [2022-01-10 01:10:15,715 INFO L226 Difference]: Without dead ends: 200 [2022-01-10 01:10:15,715 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:15,716 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:15,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 355 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-10 01:10:15,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2022-01-10 01:10:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.5510204081632653) internal successors, (304), 196 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 304 transitions. [2022-01-10 01:10:15,725 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 304 transitions. Word has length 63 [2022-01-10 01:10:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:15,725 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 304 transitions. [2022-01-10 01:10:15,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 304 transitions. [2022-01-10 01:10:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 01:10:15,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:15,727 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:15,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 01:10:15,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:15,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1995563601, now seen corresponding path program 1 times [2022-01-10 01:10:15,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:15,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755860132] [2022-01-10 01:10:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:15,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:15,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:15,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755860132] [2022-01-10 01:10:15,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755860132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:15,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:15,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:15,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923679947] [2022-01-10 01:10:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:15,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:15,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:15,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:15,772 INFO L87 Difference]: Start difference. First operand 197 states and 304 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:15,791 INFO L93 Difference]: Finished difference Result 463 states and 736 transitions. [2022-01-10 01:10:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:15,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 01:10:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:15,793 INFO L225 Difference]: With dead ends: 463 [2022-01-10 01:10:15,793 INFO L226 Difference]: Without dead ends: 323 [2022-01-10 01:10:15,794 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:15,794 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 103 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:15,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 368 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-10 01:10:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2022-01-10 01:10:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5723270440251573) internal successors, (500), 318 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 500 transitions. [2022-01-10 01:10:15,806 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 500 transitions. Word has length 65 [2022-01-10 01:10:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:15,807 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 500 transitions. [2022-01-10 01:10:15,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 500 transitions. [2022-01-10 01:10:15,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 01:10:15,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:15,808 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:15,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 01:10:15,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2137075392, now seen corresponding path program 1 times [2022-01-10 01:10:15,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:15,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412399461] [2022-01-10 01:10:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:15,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:15,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:15,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412399461] [2022-01-10 01:10:15,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412399461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:15,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:15,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:15,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736637872] [2022-01-10 01:10:15,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:15,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:15,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:15,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:15,852 INFO L87 Difference]: Start difference. First operand 319 states and 500 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:15,879 INFO L93 Difference]: Finished difference Result 815 states and 1298 transitions. [2022-01-10 01:10:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-01-10 01:10:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:15,901 INFO L225 Difference]: With dead ends: 815 [2022-01-10 01:10:15,901 INFO L226 Difference]: Without dead ends: 553 [2022-01-10 01:10:15,902 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:15,902 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 97 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:15,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 369 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:15,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-10 01:10:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 547. [2022-01-10 01:10:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 546 states have (on average 1.575091575091575) internal successors, (860), 546 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 860 transitions. [2022-01-10 01:10:15,920 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 860 transitions. Word has length 67 [2022-01-10 01:10:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:15,920 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 860 transitions. [2022-01-10 01:10:15,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 860 transitions. [2022-01-10 01:10:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 01:10:15,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:15,921 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:15,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 01:10:15,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -544230961, now seen corresponding path program 1 times [2022-01-10 01:10:15,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:15,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613455403] [2022-01-10 01:10:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:15,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:16,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613455403] [2022-01-10 01:10:16,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613455403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:16,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:16,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:16,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700472269] [2022-01-10 01:10:16,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:16,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:16,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:16,003 INFO L87 Difference]: Start difference. First operand 547 states and 860 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:16,140 INFO L93 Difference]: Finished difference Result 2339 states and 3782 transitions. [2022-01-10 01:10:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 01:10:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-01-10 01:10:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:16,148 INFO L225 Difference]: With dead ends: 2339 [2022-01-10 01:10:16,148 INFO L226 Difference]: Without dead ends: 1849 [2022-01-10 01:10:16,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:10:16,153 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 861 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:16,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1129 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:10:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2022-01-10 01:10:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 975. [2022-01-10 01:10:16,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 1.5882956878850103) internal successors, (1547), 974 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1547 transitions. [2022-01-10 01:10:16,192 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1547 transitions. Word has length 69 [2022-01-10 01:10:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:16,194 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 1547 transitions. [2022-01-10 01:10:16,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1547 transitions. [2022-01-10 01:10:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-10 01:10:16,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:16,196 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:16,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:10:16,198 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:16,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:16,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1614123231, now seen corresponding path program 1 times [2022-01-10 01:10:16,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:16,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733608157] [2022-01-10 01:10:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:16,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:16,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:16,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733608157] [2022-01-10 01:10:16,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733608157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:16,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:16,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:10:16,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420664020] [2022-01-10 01:10:16,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:16,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:10:16,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:10:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:16,267 INFO L87 Difference]: Start difference. First operand 975 states and 1547 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:16,358 INFO L93 Difference]: Finished difference Result 2837 states and 4577 transitions. [2022-01-10 01:10:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:10:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-01-10 01:10:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:16,365 INFO L225 Difference]: With dead ends: 2837 [2022-01-10 01:10:16,365 INFO L226 Difference]: Without dead ends: 1919 [2022-01-10 01:10:16,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:16,369 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 365 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:16,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 660 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-01-10 01:10:16,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1438. [2022-01-10 01:10:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 1.5984690327070286) internal successors, (2297), 1437 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 2297 transitions. [2022-01-10 01:10:16,414 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 2297 transitions. Word has length 70 [2022-01-10 01:10:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:16,414 INFO L470 AbstractCegarLoop]: Abstraction has 1438 states and 2297 transitions. [2022-01-10 01:10:16,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 2297 transitions. [2022-01-10 01:10:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 01:10:16,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:16,415 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:16,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 01:10:16,415 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:16,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash -252040890, now seen corresponding path program 1 times [2022-01-10 01:10:16,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:16,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447357731] [2022-01-10 01:10:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:16,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:16,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:16,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447357731] [2022-01-10 01:10:16,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447357731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:16,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:16,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:10:16,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270504158] [2022-01-10 01:10:16,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:16,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:10:16,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:10:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:16,492 INFO L87 Difference]: Start difference. First operand 1438 states and 2297 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:16,592 INFO L93 Difference]: Finished difference Result 4165 states and 6715 transitions. [2022-01-10 01:10:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:10:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2022-01-10 01:10:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:16,601 INFO L225 Difference]: With dead ends: 4165 [2022-01-10 01:10:16,601 INFO L226 Difference]: Without dead ends: 2784 [2022-01-10 01:10:16,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:16,604 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 363 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:16,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2022-01-10 01:10:16,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2099. [2022-01-10 01:10:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 1.5986653956148713) internal successors, (3354), 2098 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3354 transitions. [2022-01-10 01:10:16,681 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3354 transitions. Word has length 71 [2022-01-10 01:10:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:16,681 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 3354 transitions. [2022-01-10 01:10:16,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3354 transitions. [2022-01-10 01:10:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 01:10:16,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:16,684 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:16,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 01:10:16,685 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:16,688 INFO L85 PathProgramCache]: Analyzing trace with hash -630566449, now seen corresponding path program 1 times [2022-01-10 01:10:16,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:16,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499896605] [2022-01-10 01:10:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:16,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:16,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:16,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499896605] [2022-01-10 01:10:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499896605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:16,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:16,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:16,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114209869] [2022-01-10 01:10:16,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:16,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:16,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:16,723 INFO L87 Difference]: Start difference. First operand 2099 states and 3354 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:16,814 INFO L93 Difference]: Finished difference Result 4342 states and 6948 transitions. [2022-01-10 01:10:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:16,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-01-10 01:10:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:16,823 INFO L225 Difference]: With dead ends: 4342 [2022-01-10 01:10:16,823 INFO L226 Difference]: Without dead ends: 3126 [2022-01-10 01:10:16,824 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:16,825 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 96 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:16,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-01-10 01:10:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3124. [2022-01-10 01:10:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 1.585014409221902) internal successors, (4950), 3123 states have internal predecessors, (4950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 4950 transitions. [2022-01-10 01:10:16,913 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 4950 transitions. Word has length 72 [2022-01-10 01:10:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:16,913 INFO L470 AbstractCegarLoop]: Abstraction has 3124 states and 4950 transitions. [2022-01-10 01:10:16,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 4950 transitions. [2022-01-10 01:10:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 01:10:16,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:16,915 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:16,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 01:10:16,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash -808156936, now seen corresponding path program 1 times [2022-01-10 01:10:16,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:16,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547409681] [2022-01-10 01:10:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:16,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:16,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547409681] [2022-01-10 01:10:16,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547409681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:16,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:16,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:10:16,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43385992] [2022-01-10 01:10:16,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:16,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:10:16,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:10:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:16,948 INFO L87 Difference]: Start difference. First operand 3124 states and 4950 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:17,164 INFO L93 Difference]: Finished difference Result 9396 states and 15009 transitions. [2022-01-10 01:10:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:10:17,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-01-10 01:10:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:17,181 INFO L225 Difference]: With dead ends: 9396 [2022-01-10 01:10:17,181 INFO L226 Difference]: Without dead ends: 6460 [2022-01-10 01:10:17,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:17,185 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 361 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:17,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 661 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:10:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2022-01-10 01:10:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 4776. [2022-01-10 01:10:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4776 states, 4775 states have (on average 1.584083769633508) internal successors, (7564), 4775 states have internal predecessors, (7564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4776 states to 4776 states and 7564 transitions. [2022-01-10 01:10:17,346 INFO L78 Accepts]: Start accepts. Automaton has 4776 states and 7564 transitions. Word has length 72 [2022-01-10 01:10:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:17,346 INFO L470 AbstractCegarLoop]: Abstraction has 4776 states and 7564 transitions. [2022-01-10 01:10:17,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4776 states and 7564 transitions. [2022-01-10 01:10:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 01:10:17,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:17,347 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:17,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 01:10:17,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1968035874, now seen corresponding path program 1 times [2022-01-10 01:10:17,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:17,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592965994] [2022-01-10 01:10:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:17,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:17,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:17,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592965994] [2022-01-10 01:10:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592965994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:17,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:17,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870632300] [2022-01-10 01:10:17,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:17,392 INFO L87 Difference]: Start difference. First operand 4776 states and 7564 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:17,540 INFO L93 Difference]: Finished difference Result 10472 states and 16650 transitions. [2022-01-10 01:10:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-01-10 01:10:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:17,571 INFO L225 Difference]: With dead ends: 10472 [2022-01-10 01:10:17,571 INFO L226 Difference]: Without dead ends: 7115 [2022-01-10 01:10:17,576 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:17,577 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 102 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:17,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 443 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7115 states. [2022-01-10 01:10:17,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7115 to 7113. [2022-01-10 01:10:17,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7113 states, 7112 states have (on average 1.5752249718785152) internal successors, (11203), 7112 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 11203 transitions. [2022-01-10 01:10:17,820 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 11203 transitions. Word has length 72 [2022-01-10 01:10:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:17,820 INFO L470 AbstractCegarLoop]: Abstraction has 7113 states and 11203 transitions. [2022-01-10 01:10:17,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 11203 transitions. [2022-01-10 01:10:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 01:10:17,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:17,823 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:17,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:10:17,824 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash 952039085, now seen corresponding path program 1 times [2022-01-10 01:10:17,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:17,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340309004] [2022-01-10 01:10:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:17,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:17,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:17,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340309004] [2022-01-10 01:10:17,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340309004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:17,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:17,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:17,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354694107] [2022-01-10 01:10:17,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:17,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:17,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:17,887 INFO L87 Difference]: Start difference. First operand 7113 states and 11203 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:18,164 INFO L93 Difference]: Finished difference Result 15869 states and 25266 transitions. [2022-01-10 01:10:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:18,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2022-01-10 01:10:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:18,180 INFO L225 Difference]: With dead ends: 15869 [2022-01-10 01:10:18,181 INFO L226 Difference]: Without dead ends: 10691 [2022-01-10 01:10:18,186 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:18,186 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 108 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:18,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 464 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:18,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10691 states. [2022-01-10 01:10:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10691 to 10689. [2022-01-10 01:10:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 1.5716691616766467) internal successors, (16798), 10688 states have internal predecessors, (16798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 16798 transitions. [2022-01-10 01:10:18,555 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 16798 transitions. Word has length 72 [2022-01-10 01:10:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:18,555 INFO L470 AbstractCegarLoop]: Abstraction has 10689 states and 16798 transitions. [2022-01-10 01:10:18,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:18,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 16798 transitions. [2022-01-10 01:10:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 01:10:18,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:18,557 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:18,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 01:10:18,557 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1377255792, now seen corresponding path program 1 times [2022-01-10 01:10:18,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:18,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518884642] [2022-01-10 01:10:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:18,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:18,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:18,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518884642] [2022-01-10 01:10:18,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518884642] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:18,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:18,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:18,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576295612] [2022-01-10 01:10:18,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:18,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:18,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:18,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:18,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:18,650 INFO L87 Difference]: Start difference. First operand 10689 states and 16798 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:18,990 INFO L93 Difference]: Finished difference Result 21301 states and 33492 transitions. [2022-01-10 01:10:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:10:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-01-10 01:10:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:19,010 INFO L225 Difference]: With dead ends: 21301 [2022-01-10 01:10:19,010 INFO L226 Difference]: Without dead ends: 10691 [2022-01-10 01:10:19,020 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:19,021 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 362 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:19,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 544 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10691 states. [2022-01-10 01:10:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10691 to 10689. [2022-01-10 01:10:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 1.5599738023952097) internal successors, (16673), 10688 states have internal predecessors, (16673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 16673 transitions. [2022-01-10 01:10:19,413 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 16673 transitions. Word has length 74 [2022-01-10 01:10:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:19,413 INFO L470 AbstractCegarLoop]: Abstraction has 10689 states and 16673 transitions. [2022-01-10 01:10:19,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 16673 transitions. [2022-01-10 01:10:19,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 01:10:19,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:19,414 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:19,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 01:10:19,414 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1698241801, now seen corresponding path program 1 times [2022-01-10 01:10:19,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:19,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367903552] [2022-01-10 01:10:19,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:19,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:19,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:19,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367903552] [2022-01-10 01:10:19,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367903552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:19,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:19,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:19,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122672624] [2022-01-10 01:10:19,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:19,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:19,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:19,507 INFO L87 Difference]: Start difference. First operand 10689 states and 16673 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:20,172 INFO L93 Difference]: Finished difference Result 30615 states and 47912 transitions. [2022-01-10 01:10:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:10:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 01:10:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:20,210 INFO L225 Difference]: With dead ends: 30615 [2022-01-10 01:10:20,210 INFO L226 Difference]: Without dead ends: 20005 [2022-01-10 01:10:20,221 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:20,221 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 356 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:20,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 546 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20005 states. [2022-01-10 01:10:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20005 to 20003. [2022-01-10 01:10:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20003 states, 20002 states have (on average 1.5475452454754524) internal successors, (30954), 20002 states have internal predecessors, (30954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20003 states to 20003 states and 30954 transitions. [2022-01-10 01:10:20,867 INFO L78 Accepts]: Start accepts. Automaton has 20003 states and 30954 transitions. Word has length 77 [2022-01-10 01:10:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:20,867 INFO L470 AbstractCegarLoop]: Abstraction has 20003 states and 30954 transitions. [2022-01-10 01:10:20,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 20003 states and 30954 transitions. [2022-01-10 01:10:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 01:10:20,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:20,868 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:20,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 01:10:20,868 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:20,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:20,868 INFO L85 PathProgramCache]: Analyzing trace with hash 677312633, now seen corresponding path program 1 times [2022-01-10 01:10:20,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:20,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769624084] [2022-01-10 01:10:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:20,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:10:20,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:20,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769624084] [2022-01-10 01:10:20,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769624084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:20,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:20,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 01:10:20,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300112173] [2022-01-10 01:10:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:20,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 01:10:20,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 01:10:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:10:20,967 INFO L87 Difference]: Start difference. First operand 20003 states and 30954 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:22,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:22,257 INFO L93 Difference]: Finished difference Result 39191 states and 60008 transitions. [2022-01-10 01:10:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 01:10:22,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-01-10 01:10:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:22,362 INFO L225 Difference]: With dead ends: 39191 [2022-01-10 01:10:22,362 INFO L226 Difference]: Without dead ends: 39189 [2022-01-10 01:10:22,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-01-10 01:10:22,376 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 917 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:22,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 1064 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39189 states. [2022-01-10 01:10:23,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39189 to 21089. [2022-01-10 01:10:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21089 states, 21088 states have (on average 1.518920713201821) internal successors, (32031), 21088 states have internal predecessors, (32031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21089 states to 21089 states and 32031 transitions. [2022-01-10 01:10:23,306 INFO L78 Accepts]: Start accepts. Automaton has 21089 states and 32031 transitions. Word has length 78 [2022-01-10 01:10:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:23,306 INFO L470 AbstractCegarLoop]: Abstraction has 21089 states and 32031 transitions. [2022-01-10 01:10:23,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 21089 states and 32031 transitions. [2022-01-10 01:10:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 01:10:23,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:23,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:23,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 01:10:23,309 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:23,309 INFO L85 PathProgramCache]: Analyzing trace with hash -931565963, now seen corresponding path program 1 times [2022-01-10 01:10:23,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:23,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742805994] [2022-01-10 01:10:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:23,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 01:10:23,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:23,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742805994] [2022-01-10 01:10:23,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742805994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:23,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:23,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:23,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385247465] [2022-01-10 01:10:23,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:23,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:23,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:23,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:23,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:23,351 INFO L87 Difference]: Start difference. First operand 21089 states and 32031 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:24,777 INFO L93 Difference]: Finished difference Result 51599 states and 78693 transitions. [2022-01-10 01:10:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:10:24,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 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 105 [2022-01-10 01:10:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:24,841 INFO L225 Difference]: With dead ends: 51599 [2022-01-10 01:10:24,841 INFO L226 Difference]: Without dead ends: 41597 [2022-01-10 01:10:24,857 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:24,857 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 463 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:24,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 834 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41597 states. [2022-01-10 01:10:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41597 to 32429. [2022-01-10 01:10:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32429 states, 32428 states have (on average 1.5179782903663501) internal successors, (49225), 32428 states have internal predecessors, (49225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32429 states to 32429 states and 49225 transitions. [2022-01-10 01:10:26,312 INFO L78 Accepts]: Start accepts. Automaton has 32429 states and 49225 transitions. Word has length 105 [2022-01-10 01:10:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:26,312 INFO L470 AbstractCegarLoop]: Abstraction has 32429 states and 49225 transitions. [2022-01-10 01:10:26,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 32429 states and 49225 transitions. [2022-01-10 01:10:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 01:10:26,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:26,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:26,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 01:10:26,315 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2025931908, now seen corresponding path program 1 times [2022-01-10 01:10:26,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:26,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026620522] [2022-01-10 01:10:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:26,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 01:10:26,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:26,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026620522] [2022-01-10 01:10:26,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026620522] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:26,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:26,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:26,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892633953] [2022-01-10 01:10:26,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:26,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:26,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:26,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:26,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:26,369 INFO L87 Difference]: Start difference. First operand 32429 states and 49225 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:28,068 INFO L93 Difference]: Finished difference Result 55607 states and 84829 transitions. [2022-01-10 01:10:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:10:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 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 105 [2022-01-10 01:10:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:28,134 INFO L225 Difference]: With dead ends: 55607 [2022-01-10 01:10:28,134 INFO L226 Difference]: Without dead ends: 45605 [2022-01-10 01:10:28,157 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:28,158 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 457 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:28,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 894 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:28,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45605 states. [2022-01-10 01:10:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45605 to 43951. [2022-01-10 01:10:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43951 states, 43950 states have (on average 1.5191581342434586) internal successors, (66767), 43950 states have internal predecessors, (66767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43951 states to 43951 states and 66767 transitions. [2022-01-10 01:10:30,125 INFO L78 Accepts]: Start accepts. Automaton has 43951 states and 66767 transitions. Word has length 105 [2022-01-10 01:10:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:30,125 INFO L470 AbstractCegarLoop]: Abstraction has 43951 states and 66767 transitions. [2022-01-10 01:10:30,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 43951 states and 66767 transitions. [2022-01-10 01:10:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-10 01:10:30,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:30,127 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:30,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 01:10:30,128 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash 651039571, now seen corresponding path program 1 times [2022-01-10 01:10:30,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:30,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332795268] [2022-01-10 01:10:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:30,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:10:30,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:30,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332795268] [2022-01-10 01:10:30,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332795268] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:30,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:30,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:10:30,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786643075] [2022-01-10 01:10:30,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:30,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:10:30,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:30,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:10:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:10:30,182 INFO L87 Difference]: Start difference. First operand 43951 states and 66767 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:32,214 INFO L93 Difference]: Finished difference Result 62443 states and 95439 transitions. [2022-01-10 01:10:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:10:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 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 105 [2022-01-10 01:10:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:32,294 INFO L225 Difference]: With dead ends: 62443 [2022-01-10 01:10:32,294 INFO L226 Difference]: Without dead ends: 52181 [2022-01-10 01:10:32,306 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:32,306 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 464 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:32,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 856 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:32,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52181 states. [2022-01-10 01:10:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52181 to 50527. [2022-01-10 01:10:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50527 states, 50526 states have (on average 1.5221272216284685) internal successors, (76907), 50526 states have internal predecessors, (76907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50527 states to 50527 states and 76907 transitions. [2022-01-10 01:10:34,364 INFO L78 Accepts]: Start accepts. Automaton has 50527 states and 76907 transitions. Word has length 105 [2022-01-10 01:10:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:34,364 INFO L470 AbstractCegarLoop]: Abstraction has 50527 states and 76907 transitions. [2022-01-10 01:10:34,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 50527 states and 76907 transitions. [2022-01-10 01:10:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 01:10:34,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:34,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:34,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 01:10:34,368 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:34,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1079524893, now seen corresponding path program 1 times [2022-01-10 01:10:34,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:34,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235737791] [2022-01-10 01:10:34,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:34,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:10:34,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235737791] [2022-01-10 01:10:34,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235737791] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:34,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:34,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:10:34,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271943882] [2022-01-10 01:10:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:34,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:10:34,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:10:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:34,402 INFO L87 Difference]: Start difference. First operand 50527 states and 76907 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:36,801 INFO L93 Difference]: Finished difference Result 82500 states and 126296 transitions. [2022-01-10 01:10:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:10:36,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 106 [2022-01-10 01:10:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:36,906 INFO L225 Difference]: With dead ends: 82500 [2022-01-10 01:10:36,906 INFO L226 Difference]: Without dead ends: 65662 [2022-01-10 01:10:36,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:36,926 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 198 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:36,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 619 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65662 states. [2022-01-10 01:10:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65662 to 64010. [2022-01-10 01:10:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64010 states, 64009 states have (on average 1.522676498617382) internal successors, (97465), 64009 states have internal predecessors, (97465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64010 states to 64010 states and 97465 transitions. [2022-01-10 01:10:39,536 INFO L78 Accepts]: Start accepts. Automaton has 64010 states and 97465 transitions. Word has length 106 [2022-01-10 01:10:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:39,536 INFO L470 AbstractCegarLoop]: Abstraction has 64010 states and 97465 transitions. [2022-01-10 01:10:39,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 64010 states and 97465 transitions. [2022-01-10 01:10:39,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 01:10:39,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:39,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:39,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 01:10:39,539 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:39,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1502226719, now seen corresponding path program 1 times [2022-01-10 01:10:39,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:39,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724723181] [2022-01-10 01:10:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:39,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:10:39,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:39,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724723181] [2022-01-10 01:10:39,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724723181] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:39,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:39,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:10:39,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595152360] [2022-01-10 01:10:39,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:39,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:10:39,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:10:39,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:10:39,584 INFO L87 Difference]: Start difference. First operand 64010 states and 97465 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:43,732 INFO L93 Difference]: Finished difference Result 138467 states and 211675 transitions. [2022-01-10 01:10:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:10:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 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 106 [2022-01-10 01:10:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:43,968 INFO L225 Difference]: With dead ends: 138467 [2022-01-10 01:10:43,969 INFO L226 Difference]: Without dead ends: 108275 [2022-01-10 01:10:44,006 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:10:44,006 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 85 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:44,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 367 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108275 states. [2022-01-10 01:10:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108275 to 107997. [2022-01-10 01:10:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107997 states, 107996 states have (on average 1.523000851883403) internal successors, (164478), 107996 states have internal predecessors, (164478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107997 states to 107997 states and 164478 transitions. [2022-01-10 01:10:48,790 INFO L78 Accepts]: Start accepts. Automaton has 107997 states and 164478 transitions. Word has length 106 [2022-01-10 01:10:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:10:48,790 INFO L470 AbstractCegarLoop]: Abstraction has 107997 states and 164478 transitions. [2022-01-10 01:10:48,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 107997 states and 164478 transitions. [2022-01-10 01:10:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 01:10:48,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:10:48,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:10:48,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 01:10:48,793 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:10:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:10:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash 68281019, now seen corresponding path program 1 times [2022-01-10 01:10:48,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:10:48,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881455279] [2022-01-10 01:10:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:10:48,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:10:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:10:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 01:10:49,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:10:49,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881455279] [2022-01-10 01:10:49,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881455279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:10:49,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:10:49,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:10:49,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173711743] [2022-01-10 01:10:49,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:10:49,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:10:49,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:10:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:10:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:49,026 INFO L87 Difference]: Start difference. First operand 107997 states and 164478 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:10:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:10:54,189 INFO L93 Difference]: Finished difference Result 165350 states and 252847 transitions. [2022-01-10 01:10:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:10:54,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 107 [2022-01-10 01:10:54,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:10:54,473 INFO L225 Difference]: With dead ends: 165350 [2022-01-10 01:10:54,473 INFO L226 Difference]: Without dead ends: 134100 [2022-01-10 01:10:54,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:10:54,511 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 206 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:10:54,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 613 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:10:54,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134100 states. [2022-01-10 01:11:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134100 to 127520. [2022-01-10 01:11:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127520 states, 127519 states have (on average 1.522047694853316) internal successors, (194090), 127519 states have internal predecessors, (194090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:11:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127520 states to 127520 states and 194090 transitions. [2022-01-10 01:11:00,517 INFO L78 Accepts]: Start accepts. Automaton has 127520 states and 194090 transitions. Word has length 107 [2022-01-10 01:11:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:11:00,518 INFO L470 AbstractCegarLoop]: Abstraction has 127520 states and 194090 transitions. [2022-01-10 01:11:00,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:11:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 127520 states and 194090 transitions. [2022-01-10 01:11:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 01:11:00,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:11:00,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:11:00,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 01:11:00,520 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:11:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:11:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash -952787335, now seen corresponding path program 1 times [2022-01-10 01:11:00,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:11:00,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354054419] [2022-01-10 01:11:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:11:00,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:11:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:11:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 01:11:00,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:11:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354054419] [2022-01-10 01:11:00,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354054419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:11:00,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:11:00,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:11:00,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173106250] [2022-01-10 01:11:00,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:11:00,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:11:00,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:11:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:11:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:11:00,550 INFO L87 Difference]: Start difference. First operand 127520 states and 194090 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:11:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:11:08,961 INFO L93 Difference]: Finished difference Result 270171 states and 412262 transitions. [2022-01-10 01:11:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:11:08,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 107 [2022-01-10 01:11:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:11:09,554 INFO L225 Difference]: With dead ends: 270171 [2022-01-10 01:11:09,555 INFO L226 Difference]: Without dead ends: 209751 [2022-01-10 01:11:09,629 INFO L932 BasicCegarLoop]: 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 [2022-01-10 01:11:09,630 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 85 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:11:09,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 366 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:11:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209751 states. [2022-01-10 01:11:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209751 to 209221. [2022-01-10 01:11:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209221 states, 209220 states have (on average 1.5206720198833763) internal successors, (318155), 209220 states have internal predecessors, (318155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:11:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209221 states to 209221 states and 318155 transitions. [2022-01-10 01:11:19,834 INFO L78 Accepts]: Start accepts. Automaton has 209221 states and 318155 transitions. Word has length 107 [2022-01-10 01:11:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:11:19,834 INFO L470 AbstractCegarLoop]: Abstraction has 209221 states and 318155 transitions. [2022-01-10 01:11:19,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:11:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 209221 states and 318155 transitions. [2022-01-10 01:11:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-10 01:11:19,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:11:19,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:11:19,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 01:11:19,842 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:11:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:11:19,843 INFO L85 PathProgramCache]: Analyzing trace with hash -144788360, now seen corresponding path program 1 times [2022-01-10 01:11:19,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:11:19,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329027818] [2022-01-10 01:11:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:11:19,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:11:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:11:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:11:19,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:11:19,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329027818] [2022-01-10 01:11:19,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329027818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:11:19,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:11:19,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:11:19,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415970341] [2022-01-10 01:11:19,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:11:19,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:11:19,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:11:19,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:11:19,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:11:19,925 INFO L87 Difference]: Start difference. First operand 209221 states and 318155 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)