/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_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:46:53,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:46:53,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:46:53,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:46:53,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:46:53,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:46:53,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:46:53,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:46:53,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:46:53,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:46:53,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:46:53,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-10 06:46:53,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:46:53,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:46:53,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:46:53,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 06:46:53,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:46:53,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:46:53,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:46:53,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:46:53,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:46:53,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:46:53,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:46:53,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:46:53,284 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:46:53,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:46:53,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:46:53,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:46:53,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:46:53,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:46:53,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:53,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:46:53,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:46:53,288 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:46:53,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:46:53,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:46:53,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:46:53,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:46:53,438 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:46:53,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2022-01-10 06:46:53,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071935ae1/d6fd3d58b0de4b72ae9ad97c3cdbc79b/FLAG332a60ebb [2022-01-10 06:46:53,866 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:46:53,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2022-01-10 06:46:53,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071935ae1/d6fd3d58b0de4b72ae9ad97c3cdbc79b/FLAG332a60ebb [2022-01-10 06:46:53,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071935ae1/d6fd3d58b0de4b72ae9ad97c3cdbc79b [2022-01-10 06:46:53,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:46:53,890 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:46:53,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:53,893 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:46:53,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:46:53,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:53" (1/1) ... [2022-01-10 06:46:53,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ed69e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:53, skipping insertion in model container [2022-01-10 06:46:53,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:46:53" (1/1) ... [2022-01-10 06:46:53,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:46:53,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:46:54,130 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.3.4.ufo.BOUNDED-6.pals.c[12764,12777] [2022-01-10 06:46:54,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:54,138 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:46:54,185 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.3.4.ufo.BOUNDED-6.pals.c[12764,12777] [2022-01-10 06:46:54,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:46:54,206 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:46:54,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54 WrapperNode [2022-01-10 06:46:54,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:46:54,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:54,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:46:54,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:46:54,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,225 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,247 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 421 [2022-01-10 06:46:54,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:46:54,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:46:54,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:46:54,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:46:54,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:46:54,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:46:54,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:46:54,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:46:54,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (1/1) ... [2022-01-10 06:46:54,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:46:54,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:46:54,306 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 06:46:54,308 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 06:46:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:46:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:46:54,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:46:54,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:46:54,429 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:46:54,430 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:46:54,848 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:46:54,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:46:54,860 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 06:46:54,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:54 BoogieIcfgContainer [2022-01-10 06:46:54,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:46:54,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:46:54,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:46:54,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:46:54,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:46:53" (1/3) ... [2022-01-10 06:46:54,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdecebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:54, skipping insertion in model container [2022-01-10 06:46:54,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:46:54" (2/3) ... [2022-01-10 06:46:54,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdecebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:46:54, skipping insertion in model container [2022-01-10 06:46:54,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:46:54" (3/3) ... [2022-01-10 06:46:54,869 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c [2022-01-10 06:46:54,874 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:46:54,874 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:46:54,921 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:46:54,926 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 06:46:54,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:46:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 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 06:46:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:46:54,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:54,959 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 06:46:54,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:54,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:54,963 INFO L85 PathProgramCache]: Analyzing trace with hash -306716250, now seen corresponding path program 1 times [2022-01-10 06:46:54,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:54,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731164930] [2022-01-10 06:46:54,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:54,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:54,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:54,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:54,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 06:46:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:55,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 06:46:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:55,185 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 06:46:55,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:55,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:55,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731164930] [2022-01-10 06:46:55,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731164930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:55,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:55,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:46:55,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470235943] [2022-01-10 06:46:55,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:55,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 06:46:55,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 06:46:55,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 06:46:55,210 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.7596899224806202) internal successors, (227), 130 states have internal predecessors, (227), 0 states have call successors, (0), 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 06:46:55,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:55,230 INFO L93 Difference]: Finished difference Result 206 states and 352 transitions. [2022-01-10 06:46:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 06:46:55,232 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 06:46:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:55,245 INFO L225 Difference]: With dead ends: 206 [2022-01-10 06:46:55,246 INFO L226 Difference]: Without dead ends: 127 [2022-01-10 06:46:55,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 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 06:46:55,251 INFO L933 BasicCegarLoop]: 224 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, 224 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 06:46:55,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-10 06:46:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-10 06:46:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.746031746031746) internal successors, (220), 126 states have internal predecessors, (220), 0 states have call successors, (0), 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 06:46:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2022-01-10 06:46:55,286 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 37 [2022-01-10 06:46:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:55,287 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2022-01-10 06:46:55,287 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 06:46:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2022-01-10 06:46:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 06:46:55,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:55,288 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 06:46:55,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:55,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:55,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1124364700, now seen corresponding path program 1 times [2022-01-10 06:46:55,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:55,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891407256] [2022-01-10 06:46:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:55,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:55,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:55,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 06:46:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:46:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:55,649 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 06:46:55,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:55,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:55,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891407256] [2022-01-10 06:46:55,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891407256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:55,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:55,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:46:55,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258056995] [2022-01-10 06:46:55,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:55,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:46:55,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:55,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:46:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:46:55,652 INFO L87 Difference]: Start difference. First operand 127 states and 220 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 06:46:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:55,733 INFO L93 Difference]: Finished difference Result 271 states and 460 transitions. [2022-01-10 06:46:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:46:55,734 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 06:46:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:55,738 INFO L225 Difference]: With dead ends: 271 [2022-01-10 06:46:55,738 INFO L226 Difference]: Without dead ends: 197 [2022-01-10 06:46:55,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 06:46:55,740 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 120 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:55,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 832 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-10 06:46:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2022-01-10 06:46:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5317460317460319) internal successors, (193), 126 states have internal predecessors, (193), 0 states have call successors, (0), 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 06:46:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 193 transitions. [2022-01-10 06:46:55,759 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 193 transitions. Word has length 37 [2022-01-10 06:46:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:55,759 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 193 transitions. [2022-01-10 06:46:55,759 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 06:46:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 193 transitions. [2022-01-10 06:46:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-10 06:46:55,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:55,761 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 06:46:55,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,967 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1313145683, now seen corresponding path program 1 times [2022-01-10 06:46:55,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:55,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976831236] [2022-01-10 06:46:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:55,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:55,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:55,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:55,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 06:46:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:56,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:56,203 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 06:46:56,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:56,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976831236] [2022-01-10 06:46:56,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976831236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:56,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:56,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:56,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138156877] [2022-01-10 06:46:56,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:56,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:56,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:56,205 INFO L87 Difference]: Start difference. First operand 127 states and 193 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 06:46:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:56,244 INFO L93 Difference]: Finished difference Result 258 states and 412 transitions. [2022-01-10 06:46:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:56,244 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 06:46:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:56,245 INFO L225 Difference]: With dead ends: 258 [2022-01-10 06:46:56,245 INFO L226 Difference]: Without dead ends: 188 [2022-01-10 06:46:56,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 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 06:46:56,246 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:56,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 421 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-10 06:46:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-01-10 06:46:56,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5567567567567568) internal successors, (288), 185 states have internal predecessors, (288), 0 states have call successors, (0), 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 06:46:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2022-01-10 06:46:56,253 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 63 [2022-01-10 06:46:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2022-01-10 06:46:56,253 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 06:46:56,253 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2022-01-10 06:46:56,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:46:56,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:56,255 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 06:46:56,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:56,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:56,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash -255493166, now seen corresponding path program 1 times [2022-01-10 06:46:56,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:56,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788649501] [2022-01-10 06:46:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:56,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:56,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:56,471 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:56,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 06:46:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:56,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:56,622 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 06:46:56,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:56,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:56,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788649501] [2022-01-10 06:46:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788649501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:56,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:56,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:56,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130299072] [2022-01-10 06:46:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:56,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:56,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:56,624 INFO L87 Difference]: Start difference. First operand 186 states and 288 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 06:46:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:56,644 INFO L93 Difference]: Finished difference Result 313 states and 501 transitions. [2022-01-10 06:46:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:56,644 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 06:46:56,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:56,645 INFO L225 Difference]: With dead ends: 313 [2022-01-10 06:46:56,645 INFO L226 Difference]: Without dead ends: 243 [2022-01-10 06:46:56,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 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 06:46:56,646 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 102 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 441 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 06:46:56,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 441 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-10 06:46:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2022-01-10 06:46:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5833333333333333) internal successors, (380), 240 states have internal predecessors, (380), 0 states have call successors, (0), 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 06:46:56,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 380 transitions. [2022-01-10 06:46:56,653 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 380 transitions. Word has length 65 [2022-01-10 06:46:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:56,653 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 380 transitions. [2022-01-10 06:46:56,654 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 06:46:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 380 transitions. [2022-01-10 06:46:56,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 06:46:56,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:56,655 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 06:46:56,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:56,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:56,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:56,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1395779292, now seen corresponding path program 1 times [2022-01-10 06:46:56,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:56,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795845052] [2022-01-10 06:46:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:56,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:56,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:56,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 06:46:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:57,062 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 06:46:57,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:57,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:57,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795845052] [2022-01-10 06:46:57,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795845052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:57,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:57,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:57,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128280047] [2022-01-10 06:46:57,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:57,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:57,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:57,071 INFO L87 Difference]: Start difference. First operand 241 states and 380 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 06:46:57,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:57,107 INFO L93 Difference]: Finished difference Result 701 states and 1103 transitions. [2022-01-10 06:46:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:57,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 06:46:57,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:57,109 INFO L225 Difference]: With dead ends: 701 [2022-01-10 06:46:57,109 INFO L226 Difference]: Without dead ends: 469 [2022-01-10 06:46:57,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 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 06:46:57,112 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 393 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:57,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 463 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-10 06:46:57,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 467. [2022-01-10 06:46:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 1.5665236051502145) internal successors, (730), 466 states have internal predecessors, (730), 0 states have call successors, (0), 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 06:46:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 730 transitions. [2022-01-10 06:46:57,130 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 730 transitions. Word has length 65 [2022-01-10 06:46:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:57,131 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 730 transitions. [2022-01-10 06:46:57,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 06:46:57,132 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 730 transitions. [2022-01-10 06:46:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 06:46:57,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:57,133 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] [2022-01-10 06:46:57,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:57,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:57,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:57,342 INFO L85 PathProgramCache]: Analyzing trace with hash 913413416, now seen corresponding path program 1 times [2022-01-10 06:46:57,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:57,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493477627] [2022-01-10 06:46:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:57,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:57,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:57,344 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:57,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 06:46:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:57,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:57,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:57,478 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 06:46:57,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:57,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:57,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493477627] [2022-01-10 06:46:57,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493477627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:57,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:57,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079179021] [2022-01-10 06:46:57,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:57,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:57,480 INFO L87 Difference]: Start difference. First operand 467 states and 730 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:57,495 INFO L93 Difference]: Finished difference Result 1363 states and 2128 transitions. [2022-01-10 06:46:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 06:46:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:57,498 INFO L225 Difference]: With dead ends: 1363 [2022-01-10 06:46:57,498 INFO L226 Difference]: Without dead ends: 924 [2022-01-10 06:46:57,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 06:46:57,500 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 182 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:57,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 544 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-10 06:46:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 469. [2022-01-10 06:46:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.564102564102564) internal successors, (732), 468 states have internal predecessors, (732), 0 states have call successors, (0), 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 06:46:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 732 transitions. [2022-01-10 06:46:57,513 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 732 transitions. Word has length 66 [2022-01-10 06:46:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:57,514 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 732 transitions. [2022-01-10 06:46:57,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:46:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 732 transitions. [2022-01-10 06:46:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:46:57,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:57,515 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 06:46:57,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 06:46:57,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:57,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2137442455, now seen corresponding path program 1 times [2022-01-10 06:46:57,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083038114] [2022-01-10 06:46:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:57,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:57,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:57,723 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:57,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 06:46:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:57,905 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 06:46:57,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:57,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083038114] [2022-01-10 06:46:57,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083038114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:57,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:57,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:57,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109379464] [2022-01-10 06:46:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:57,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:57,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:57,906 INFO L87 Difference]: Start difference. First operand 469 states and 732 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:57,942 INFO L93 Difference]: Finished difference Result 1367 states and 2134 transitions. [2022-01-10 06:46:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:57,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:57,945 INFO L225 Difference]: With dead ends: 1367 [2022-01-10 06:46:57,945 INFO L226 Difference]: Without dead ends: 910 [2022-01-10 06:46:57,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 06:46:57,946 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 386 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:57,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 461 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-01-10 06:46:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 908. [2022-01-10 06:46:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 1.5490628445424477) internal successors, (1405), 907 states have internal predecessors, (1405), 0 states have call successors, (0), 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 06:46:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1405 transitions. [2022-01-10 06:46:57,967 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1405 transitions. Word has length 67 [2022-01-10 06:46:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:57,968 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 1405 transitions. [2022-01-10 06:46:57,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1405 transitions. [2022-01-10 06:46:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 06:46:57,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:57,969 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 06:46:57,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-01-10 06:46:58,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:58,177 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 45483464, now seen corresponding path program 1 times [2022-01-10 06:46:58,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:58,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586078278] [2022-01-10 06:46:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:58,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:58,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:58,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 06:46:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:58,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:58,306 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 06:46:58,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:58,306 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:58,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586078278] [2022-01-10 06:46:58,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586078278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:58,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435998791] [2022-01-10 06:46:58,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:58,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:58,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:58,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:58,308 INFO L87 Difference]: Start difference. First operand 908 states and 1405 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:58,328 INFO L93 Difference]: Finished difference Result 1581 states and 2441 transitions. [2022-01-10 06:46:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:58,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:58,330 INFO L225 Difference]: With dead ends: 1581 [2022-01-10 06:46:58,330 INFO L226 Difference]: Without dead ends: 689 [2022-01-10 06:46:58,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 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 06:46:58,332 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 69 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:58,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 610 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-01-10 06:46:58,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 689. [2022-01-10 06:46:58,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.5392441860465116) internal successors, (1059), 688 states have internal predecessors, (1059), 0 states have call successors, (0), 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 06:46:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1059 transitions. [2022-01-10 06:46:58,346 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1059 transitions. Word has length 67 [2022-01-10 06:46:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:58,347 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 1059 transitions. [2022-01-10 06:46:58,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 06:46:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1059 transitions. [2022-01-10 06:46:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 06:46:58,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:58,348 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 06:46:58,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:58,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:58,556 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1836023516, now seen corresponding path program 1 times [2022-01-10 06:46:58,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:58,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442475606] [2022-01-10 06:46:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:58,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:58,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:58,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:58,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 06:46:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:58,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:58,728 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 06:46:58,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:58,728 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:58,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442475606] [2022-01-10 06:46:58,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442475606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:58,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:58,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:58,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970168931] [2022-01-10 06:46:58,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:58,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:58,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:58,730 INFO L87 Difference]: Start difference. First operand 689 states and 1059 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 06:46:58,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:58,755 INFO L93 Difference]: Finished difference Result 1685 states and 2680 transitions. [2022-01-10 06:46:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:58,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 06:46:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:58,760 INFO L225 Difference]: With dead ends: 1685 [2022-01-10 06:46:58,760 INFO L226 Difference]: Without dead ends: 1157 [2022-01-10 06:46:58,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 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 06:46:58,762 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 91 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:58,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 356 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2022-01-10 06:46:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1155. [2022-01-10 06:46:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.5658578856152514) internal successors, (1807), 1154 states have internal predecessors, (1807), 0 states have call successors, (0), 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 06:46:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1807 transitions. [2022-01-10 06:46:58,788 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1807 transitions. Word has length 69 [2022-01-10 06:46:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:58,789 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1807 transitions. [2022-01-10 06:46:58,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 06:46:58,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1807 transitions. [2022-01-10 06:46:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:46:58,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:58,792 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 06:46:58,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:59,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:59,000 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1905627253, now seen corresponding path program 1 times [2022-01-10 06:46:59,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:59,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776455715] [2022-01-10 06:46:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:59,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:59,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:59,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 06:46:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:46:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:59,169 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 06:46:59,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:59,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:59,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776455715] [2022-01-10 06:46:59,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776455715] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:59,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:59,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:46:59,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112083420] [2022-01-10 06:46:59,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:59,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:46:59,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:59,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:46:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:46:59,171 INFO L87 Difference]: Start difference. First operand 1155 states and 1807 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 06:46:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:59,237 INFO L93 Difference]: Finished difference Result 3362 states and 5262 transitions. [2022-01-10 06:46:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:46:59,238 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 06:46:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:59,243 INFO L225 Difference]: With dead ends: 3362 [2022-01-10 06:46:59,244 INFO L226 Difference]: Without dead ends: 2242 [2022-01-10 06:46:59,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 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 06:46:59,245 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 445 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:46:59,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 366 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-01-10 06:46:59,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2240. [2022-01-10 06:46:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 1.5533720410897722) internal successors, (3478), 2239 states have internal predecessors, (3478), 0 states have call successors, (0), 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 06:46:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3478 transitions. [2022-01-10 06:46:59,290 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3478 transitions. Word has length 71 [2022-01-10 06:46:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:59,290 INFO L470 AbstractCegarLoop]: Abstraction has 2240 states and 3478 transitions. [2022-01-10 06:46:59,291 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 06:46:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3478 transitions. [2022-01-10 06:46:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:46:59,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:59,292 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 06:46:59,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:59,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:59,503 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 126166603, now seen corresponding path program 1 times [2022-01-10 06:46:59,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339278245] [2022-01-10 06:46:59,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:59,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:59,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:59,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 06:46:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:46:59,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:46:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:46:59,637 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 06:46:59,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:46:59,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:46:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339278245] [2022-01-10 06:46:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339278245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:46:59,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:46:59,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:46:59,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358239292] [2022-01-10 06:46:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:46:59,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:46:59,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:46:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:46:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:46:59,639 INFO L87 Difference]: Start difference. First operand 2240 states and 3478 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 06:46:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:46:59,685 INFO L93 Difference]: Finished difference Result 4112 states and 6500 transitions. [2022-01-10 06:46:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:46:59,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 06:46:59,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:46:59,694 INFO L225 Difference]: With dead ends: 4112 [2022-01-10 06:46:59,694 INFO L226 Difference]: Without dead ends: 3079 [2022-01-10 06:46:59,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 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 06:46:59,696 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 94 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 430 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 06:46:59,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 430 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:46:59,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-01-10 06:46:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 3077. [2022-01-10 06:46:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 1.5588426527958388) internal successors, (4795), 3076 states have internal predecessors, (4795), 0 states have call successors, (0), 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 06:46:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 4795 transitions. [2022-01-10 06:46:59,758 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 4795 transitions. Word has length 71 [2022-01-10 06:46:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:46:59,758 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 4795 transitions. [2022-01-10 06:46:59,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 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 06:46:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 4795 transitions. [2022-01-10 06:46:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 06:46:59,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:46:59,760 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 06:46:59,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 06:46:59,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:46:59,971 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:46:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:46:59,972 INFO L85 PathProgramCache]: Analyzing trace with hash 590514351, now seen corresponding path program 1 times [2022-01-10 06:46:59,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:46:59,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172761995] [2022-01-10 06:46:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:46:59,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:46:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:46:59,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:46:59,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 06:47:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:00,099 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 06:47:00,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:00,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172761995] [2022-01-10 06:47:00,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172761995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:00,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:00,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:00,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014925241] [2022-01-10 06:47:00,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:00,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:00,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:00,100 INFO L87 Difference]: Start difference. First operand 3077 states and 4795 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 06:47:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:00,185 INFO L93 Difference]: Finished difference Result 9137 states and 14244 transitions. [2022-01-10 06:47:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:00,186 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 06:47:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:00,200 INFO L225 Difference]: With dead ends: 9137 [2022-01-10 06:47:00,200 INFO L226 Difference]: Without dead ends: 6116 [2022-01-10 06:47:00,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 06:47:00,204 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 168 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:00,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 500 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2022-01-10 06:47:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 3083. [2022-01-10 06:47:00,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 1.5577547047371836) internal successors, (4801), 3082 states have internal predecessors, (4801), 0 states have call successors, (0), 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 06:47:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 4801 transitions. [2022-01-10 06:47:00,283 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 4801 transitions. Word has length 72 [2022-01-10 06:47:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:00,283 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 4801 transitions. [2022-01-10 06:47:00,284 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 06:47:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 4801 transitions. [2022-01-10 06:47:00,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:47:00,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:00,285 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] [2022-01-10 06:47:00,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:00,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:00,491 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1199259078, now seen corresponding path program 1 times [2022-01-10 06:47:00,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:00,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132858135] [2022-01-10 06:47:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:00,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:00,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:00,493 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:00,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 06:47:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:00,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:00,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:00,665 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 06:47:00,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:00,666 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132858135] [2022-01-10 06:47:00,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132858135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:00,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:00,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:00,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744663661] [2022-01-10 06:47:00,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:00,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:00,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:00,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:00,667 INFO L87 Difference]: Start difference. First operand 3083 states and 4801 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:00,802 INFO L93 Difference]: Finished difference Result 9037 states and 14064 transitions. [2022-01-10 06:47:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 06:47:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:00,818 INFO L225 Difference]: With dead ends: 9037 [2022-01-10 06:47:00,818 INFO L226 Difference]: Without dead ends: 5995 [2022-01-10 06:47:00,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 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 06:47:00,822 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 364 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:00,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 444 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2022-01-10 06:47:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 5993. [2022-01-10 06:47:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5993 states, 5992 states have (on average 1.5397196261682242) internal successors, (9226), 5992 states have internal predecessors, (9226), 0 states have call successors, (0), 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 06:47:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5993 states to 5993 states and 9226 transitions. [2022-01-10 06:47:00,970 INFO L78 Accepts]: Start accepts. Automaton has 5993 states and 9226 transitions. Word has length 73 [2022-01-10 06:47:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:00,970 INFO L470 AbstractCegarLoop]: Abstraction has 5993 states and 9226 transitions. [2022-01-10 06:47:00,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5993 states and 9226 transitions. [2022-01-10 06:47:00,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 06:47:00,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:00,972 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] [2022-01-10 06:47:00,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:01,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:01,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash -994296201, now seen corresponding path program 1 times [2022-01-10 06:47:01,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:01,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677799564] [2022-01-10 06:47:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:01,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:01,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:01,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:01,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 06:47:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:01,309 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 06:47:01,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:01,309 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:01,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677799564] [2022-01-10 06:47:01,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677799564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:01,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:01,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:01,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460236315] [2022-01-10 06:47:01,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:01,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:01,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:01,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:01,310 INFO L87 Difference]: Start difference. First operand 5993 states and 9226 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:01,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:01,389 INFO L93 Difference]: Finished difference Result 10498 states and 16134 transitions. [2022-01-10 06:47:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-01-10 06:47:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:01,412 INFO L225 Difference]: With dead ends: 10498 [2022-01-10 06:47:01,412 INFO L226 Difference]: Without dead ends: 4554 [2022-01-10 06:47:01,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 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 06:47:01,419 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 47 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:01,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 589 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:01,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2022-01-10 06:47:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 4553. [2022-01-10 06:47:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 1.531634446397188) internal successors, (6972), 4552 states have internal predecessors, (6972), 0 states have call successors, (0), 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 06:47:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6972 transitions. [2022-01-10 06:47:01,547 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6972 transitions. Word has length 73 [2022-01-10 06:47:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:01,547 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6972 transitions. [2022-01-10 06:47:01,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6972 transitions. [2022-01-10 06:47:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:47:01,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:01,549 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] [2022-01-10 06:47:01,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:01,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:01,756 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1311372683, now seen corresponding path program 1 times [2022-01-10 06:47:01,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:01,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415768347] [2022-01-10 06:47:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:01,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:01,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:01,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:01,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 06:47:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:01,933 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 06:47:01,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:01,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:01,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415768347] [2022-01-10 06:47:01,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415768347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:01,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:01,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:01,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142017675] [2022-01-10 06:47:01,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:01,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:01,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:01,934 INFO L87 Difference]: Start difference. First operand 4553 states and 6972 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 06:47:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:02,039 INFO L93 Difference]: Finished difference Result 12144 states and 18935 transitions. [2022-01-10 06:47:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:02,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-01-10 06:47:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:02,053 INFO L225 Difference]: With dead ends: 12144 [2022-01-10 06:47:02,053 INFO L226 Difference]: Without dead ends: 8092 [2022-01-10 06:47:02,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 73 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 06:47:02,060 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 81 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:02,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 352 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8092 states. [2022-01-10 06:47:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8092 to 8090. [2022-01-10 06:47:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 8089 states have (on average 1.53949808381753) internal successors, (12453), 8089 states have internal predecessors, (12453), 0 states have call successors, (0), 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 06:47:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 12453 transitions. [2022-01-10 06:47:02,244 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 12453 transitions. Word has length 75 [2022-01-10 06:47:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:02,244 INFO L470 AbstractCegarLoop]: Abstraction has 8090 states and 12453 transitions. [2022-01-10 06:47:02,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 06:47:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 12453 transitions. [2022-01-10 06:47:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:47:02,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:02,246 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 06:47:02,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:02,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:02,458 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:02,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:02,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1994583226, now seen corresponding path program 1 times [2022-01-10 06:47:02,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815853485] [2022-01-10 06:47:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:02,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:02,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:02,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:02,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 06:47:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:02,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:02,608 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 06:47:02,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:02,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:02,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815853485] [2022-01-10 06:47:02,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815853485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:02,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:02,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:02,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495563529] [2022-01-10 06:47:02,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:02,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:02,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:02,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:02,609 INFO L87 Difference]: Start difference. First operand 8090 states and 12453 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:47:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:02,820 INFO L93 Difference]: Finished difference Result 21196 states and 32624 transitions. [2022-01-10 06:47:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:02,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:47:02,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:02,843 INFO L225 Difference]: With dead ends: 21196 [2022-01-10 06:47:02,843 INFO L226 Difference]: Without dead ends: 13193 [2022-01-10 06:47:02,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 06:47:02,853 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 396 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:02,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 371 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13193 states. [2022-01-10 06:47:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13193 to 13191. [2022-01-10 06:47:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13191 states, 13190 states have (on average 1.5210007581501137) internal successors, (20062), 13190 states have internal predecessors, (20062), 0 states have call successors, (0), 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 06:47:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13191 states to 13191 states and 20062 transitions. [2022-01-10 06:47:03,165 INFO L78 Accepts]: Start accepts. Automaton has 13191 states and 20062 transitions. Word has length 77 [2022-01-10 06:47:03,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:03,165 INFO L470 AbstractCegarLoop]: Abstraction has 13191 states and 20062 transitions. [2022-01-10 06:47:03,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:47:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 13191 states and 20062 transitions. [2022-01-10 06:47:03,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 06:47:03,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:03,167 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 06:47:03,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:03,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:03,374 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1358664692, now seen corresponding path program 1 times [2022-01-10 06:47:03,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037665891] [2022-01-10 06:47:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:03,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:03,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:03,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 06:47:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:03,519 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 06:47:03,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:03,519 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:03,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037665891] [2022-01-10 06:47:03,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037665891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:03,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:03,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:03,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994194002] [2022-01-10 06:47:03,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:03,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:03,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:03,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:03,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:03,520 INFO L87 Difference]: Start difference. First operand 13191 states and 20062 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:47:03,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:03,724 INFO L93 Difference]: Finished difference Result 20183 states and 30701 transitions. [2022-01-10 06:47:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:47:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:03,743 INFO L225 Difference]: With dead ends: 20183 [2022-01-10 06:47:03,743 INFO L226 Difference]: Without dead ends: 11494 [2022-01-10 06:47:03,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 06:47:03,752 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 47 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:03,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 580 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2022-01-10 06:47:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 11494. [2022-01-10 06:47:04,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11494 states, 11493 states have (on average 1.5179674584529714) internal successors, (17446), 11493 states have internal predecessors, (17446), 0 states have call successors, (0), 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 06:47:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11494 states to 11494 states and 17446 transitions. [2022-01-10 06:47:04,041 INFO L78 Accepts]: Start accepts. Automaton has 11494 states and 17446 transitions. Word has length 77 [2022-01-10 06:47:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:04,041 INFO L470 AbstractCegarLoop]: Abstraction has 11494 states and 17446 transitions. [2022-01-10 06:47:04,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 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 06:47:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 11494 states and 17446 transitions. [2022-01-10 06:47:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:47:04,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:04,043 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 06:47:04,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:47:04,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:04,250 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash 150493366, now seen corresponding path program 1 times [2022-01-10 06:47:04,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:04,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210508999] [2022-01-10 06:47:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:04,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:04,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 06:47:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:04,384 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 06:47:04,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:04,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210508999] [2022-01-10 06:47:04,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210508999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:04,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:04,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095354086] [2022-01-10 06:47:04,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:04,386 INFO L87 Difference]: Start difference. First operand 11494 states and 17446 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 06:47:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:04,692 INFO L93 Difference]: Finished difference Result 31424 states and 47834 transitions. [2022-01-10 06:47:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 06:47:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:04,755 INFO L225 Difference]: With dead ends: 31424 [2022-01-10 06:47:04,756 INFO L226 Difference]: Without dead ends: 22886 [2022-01-10 06:47:04,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 06:47:04,769 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 154 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:04,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 510 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22886 states. [2022-01-10 06:47:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22886 to 11504. [2022-01-10 06:47:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11504 states, 11503 states have (on average 1.5175171694340608) internal successors, (17456), 11503 states have internal predecessors, (17456), 0 states have call successors, (0), 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 06:47:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11504 states to 11504 states and 17456 transitions. [2022-01-10 06:47:05,099 INFO L78 Accepts]: Start accepts. Automaton has 11504 states and 17456 transitions. Word has length 78 [2022-01-10 06:47:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:05,099 INFO L470 AbstractCegarLoop]: Abstraction has 11504 states and 17456 transitions. [2022-01-10 06:47:05,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 06:47:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11504 states and 17456 transitions. [2022-01-10 06:47:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 06:47:05,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:05,101 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 06:47:05,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-01-10 06:47:05,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:05,308 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:05,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:05,308 INFO L85 PathProgramCache]: Analyzing trace with hash 384835178, now seen corresponding path program 1 times [2022-01-10 06:47:05,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:05,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376290363] [2022-01-10 06:47:05,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:05,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:05,310 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:05,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 06:47:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:05,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:47:05,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:05,463 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 06:47:05,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:05,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:05,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376290363] [2022-01-10 06:47:05,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376290363] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:05,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:05,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:47:05,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882100192] [2022-01-10 06:47:05,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:05,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:47:05,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:47:05,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:47:05,464 INFO L87 Difference]: Start difference. First operand 11504 states and 17456 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 06:47:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:05,746 INFO L93 Difference]: Finished difference Result 21602 states and 33129 transitions. [2022-01-10 06:47:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:47:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 06:47:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:05,766 INFO L225 Difference]: With dead ends: 21602 [2022-01-10 06:47:05,766 INFO L226 Difference]: Without dead ends: 15810 [2022-01-10 06:47:05,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 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 06:47:05,775 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 84 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 405 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 06:47:05,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 405 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15810 states. [2022-01-10 06:47:06,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15810 to 15808. [2022-01-10 06:47:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15808 states, 15807 states have (on average 1.5164167773771113) internal successors, (23970), 15807 states have internal predecessors, (23970), 0 states have call successors, (0), 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 06:47:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15808 states to 15808 states and 23970 transitions. [2022-01-10 06:47:06,182 INFO L78 Accepts]: Start accepts. Automaton has 15808 states and 23970 transitions. Word has length 78 [2022-01-10 06:47:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:06,182 INFO L470 AbstractCegarLoop]: Abstraction has 15808 states and 23970 transitions. [2022-01-10 06:47:06,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 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 06:47:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 15808 states and 23970 transitions. [2022-01-10 06:47:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:47:06,184 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:06,184 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, 1] [2022-01-10 06:47:06,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:06,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:06,393 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2026068107, now seen corresponding path program 1 times [2022-01-10 06:47:06,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:06,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565763627] [2022-01-10 06:47:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:06,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:06,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:06,395 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:06,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 06:47:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:06,572 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 06:47:06,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:06,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565763627] [2022-01-10 06:47:06,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565763627] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:06,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:06,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:06,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995969076] [2022-01-10 06:47:06,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:06,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:06,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:06,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:06,573 INFO L87 Difference]: Start difference. First operand 15808 states and 23970 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 06:47:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:07,191 INFO L93 Difference]: Finished difference Result 40852 states and 61920 transitions. [2022-01-10 06:47:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-01-10 06:47:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:07,230 INFO L225 Difference]: With dead ends: 40852 [2022-01-10 06:47:07,231 INFO L226 Difference]: Without dead ends: 25198 [2022-01-10 06:47:07,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 06:47:07,248 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 345 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:07,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 426 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25198 states. [2022-01-10 06:47:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25198 to 25196. [2022-01-10 06:47:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25196 states, 25195 states have (on average 1.4993451081563802) internal successors, (37776), 25195 states have internal predecessors, (37776), 0 states have call successors, (0), 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 06:47:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25196 states to 25196 states and 37776 transitions. [2022-01-10 06:47:07,937 INFO L78 Accepts]: Start accepts. Automaton has 25196 states and 37776 transitions. Word has length 79 [2022-01-10 06:47:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:07,937 INFO L470 AbstractCegarLoop]: Abstraction has 25196 states and 37776 transitions. [2022-01-10 06:47:07,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 06:47:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 25196 states and 37776 transitions. [2022-01-10 06:47:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:47:07,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:07,940 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, 1] [2022-01-10 06:47:07,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:08,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:08,146 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:08,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1037970342, now seen corresponding path program 1 times [2022-01-10 06:47:08,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:08,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429189826] [2022-01-10 06:47:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:08,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:08,148 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:08,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 06:47:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:08,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:08,283 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 06:47:08,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:08,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:08,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429189826] [2022-01-10 06:47:08,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429189826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:08,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:08,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:08,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333496703] [2022-01-10 06:47:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:08,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:08,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:08,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:08,285 INFO L87 Difference]: Start difference. First operand 25196 states and 37776 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 06:47:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:08,770 INFO L93 Difference]: Finished difference Result 35835 states and 53772 transitions. [2022-01-10 06:47:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2022-01-10 06:47:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:08,798 INFO L225 Difference]: With dead ends: 35835 [2022-01-10 06:47:08,798 INFO L226 Difference]: Without dead ends: 21717 [2022-01-10 06:47:08,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 06:47:08,810 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 21 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:08,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 556 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:47:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21717 states. [2022-01-10 06:47:09,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21717 to 21717. [2022-01-10 06:47:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21717 states, 21716 states have (on average 1.496454227297845) internal successors, (32497), 21716 states have internal predecessors, (32497), 0 states have call successors, (0), 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 06:47:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21717 states to 21717 states and 32497 transitions. [2022-01-10 06:47:09,422 INFO L78 Accepts]: Start accepts. Automaton has 21717 states and 32497 transitions. Word has length 79 [2022-01-10 06:47:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:09,422 INFO L470 AbstractCegarLoop]: Abstraction has 21717 states and 32497 transitions. [2022-01-10 06:47:09,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 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 06:47:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 21717 states and 32497 transitions. [2022-01-10 06:47:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:47:09,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:09,424 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, 1, 1, 1] [2022-01-10 06:47:09,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-01-10 06:47:09,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:09,625 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:09,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1760005626, now seen corresponding path program 1 times [2022-01-10 06:47:09,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:09,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187494076] [2022-01-10 06:47:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:09,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:09,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:09,627 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:09,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 06:47:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:09,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:47:09,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:09,996 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 06:47:09,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:09,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187494076] [2022-01-10 06:47:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187494076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:47:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823673110] [2022-01-10 06:47:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:47:09,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:47:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:09,998 INFO L87 Difference]: Start difference. First operand 21717 states and 32497 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 06:47:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:11,469 INFO L93 Difference]: Finished difference Result 83483 states and 127199 transitions. [2022-01-10 06:47:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:47:11,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2022-01-10 06:47:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:11,562 INFO L225 Difference]: With dead ends: 83483 [2022-01-10 06:47:11,562 INFO L226 Difference]: Without dead ends: 62799 [2022-01-10 06:47:11,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:11,590 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 359 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:11,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 849 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62799 states. [2022-01-10 06:47:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62799 to 53489. [2022-01-10 06:47:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53489 states, 53488 states have (on average 1.4936621298235118) internal successors, (79893), 53488 states have internal predecessors, (79893), 0 states have call successors, (0), 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 06:47:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53489 states to 53489 states and 79893 transitions. [2022-01-10 06:47:13,222 INFO L78 Accepts]: Start accepts. Automaton has 53489 states and 79893 transitions. Word has length 81 [2022-01-10 06:47:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:13,223 INFO L470 AbstractCegarLoop]: Abstraction has 53489 states and 79893 transitions. [2022-01-10 06:47:13,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 06:47:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 53489 states and 79893 transitions. [2022-01-10 06:47:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 06:47:13,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:13,225 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, 1, 1, 1, 1] [2022-01-10 06:47:13,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:13,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:13,427 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1097734209, now seen corresponding path program 1 times [2022-01-10 06:47:13,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:13,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868111041] [2022-01-10 06:47:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:13,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:13,429 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:13,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 06:47:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:13,685 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 06:47:13,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:13,685 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:13,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868111041] [2022-01-10 06:47:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868111041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:13,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:13,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:13,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570691287] [2022-01-10 06:47:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:13,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:13,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:13,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:13,686 INFO L87 Difference]: Start difference. First operand 53489 states and 79893 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 06:47:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:16,035 INFO L93 Difference]: Finished difference Result 147841 states and 223454 transitions. [2022-01-10 06:47:16,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-01-10 06:47:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:16,196 INFO L225 Difference]: With dead ends: 147841 [2022-01-10 06:47:16,196 INFO L226 Difference]: Without dead ends: 95385 [2022-01-10 06:47:16,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 79 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 06:47:16,243 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 328 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:16,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 439 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95385 states. [2022-01-10 06:47:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95385 to 85699. [2022-01-10 06:47:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85699 states, 85698 states have (on average 1.495472473103223) internal successors, (128159), 85698 states have internal predecessors, (128159), 0 states have call successors, (0), 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 06:47:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85699 states to 85699 states and 128159 transitions. [2022-01-10 06:47:19,205 INFO L78 Accepts]: Start accepts. Automaton has 85699 states and 128159 transitions. Word has length 82 [2022-01-10 06:47:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:19,205 INFO L470 AbstractCegarLoop]: Abstraction has 85699 states and 128159 transitions. [2022-01-10 06:47:19,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 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 06:47:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 85699 states and 128159 transitions. [2022-01-10 06:47:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 06:47:19,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:19,207 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, 1, 1, 1, 1, 1] [2022-01-10 06:47:19,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:19,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:19,413 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2083806191, now seen corresponding path program 1 times [2022-01-10 06:47:19,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:19,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060700678] [2022-01-10 06:47:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:19,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:19,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:19,415 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:19,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 06:47:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:19,670 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 06:47:19,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:19,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:19,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060700678] [2022-01-10 06:47:19,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060700678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:19,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:19,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:19,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170848312] [2022-01-10 06:47:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:19,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:19,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:19,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:19,671 INFO L87 Difference]: Start difference. First operand 85699 states and 128159 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:23,359 INFO L93 Difference]: Finished difference Result 226929 states and 341170 transitions. [2022-01-10 06:47:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:23,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-01-10 06:47:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:23,609 INFO L225 Difference]: With dead ends: 226929 [2022-01-10 06:47:23,609 INFO L226 Difference]: Without dead ends: 142263 [2022-01-10 06:47:23,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 06:47:23,657 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 242 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:23,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 587 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142263 states. [2022-01-10 06:47:27,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142263 to 132397. [2022-01-10 06:47:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132397 states, 132396 states have (on average 1.4857624097404756) internal successors, (196709), 132396 states have internal predecessors, (196709), 0 states have call successors, (0), 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 06:47:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132397 states to 132397 states and 196709 transitions. [2022-01-10 06:47:28,088 INFO L78 Accepts]: Start accepts. Automaton has 132397 states and 196709 transitions. Word has length 83 [2022-01-10 06:47:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:28,089 INFO L470 AbstractCegarLoop]: Abstraction has 132397 states and 196709 transitions. [2022-01-10 06:47:28,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:28,089 INFO L276 IsEmpty]: Start isEmpty. Operand 132397 states and 196709 transitions. [2022-01-10 06:47:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:47:28,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:28,091 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, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:28,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 06:47:28,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:28,297 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1758306440, now seen corresponding path program 1 times [2022-01-10 06:47:28,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:28,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952892369] [2022-01-10 06:47:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:28,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:28,299 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:28,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 06:47:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:47:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:28,561 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 06:47:28,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:28,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:28,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952892369] [2022-01-10 06:47:28,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952892369] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:28,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:28,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:47:28,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178470680] [2022-01-10 06:47:28,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:28,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:47:28,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:47:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:47:28,563 INFO L87 Difference]: Start difference. First operand 132397 states and 196709 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:35,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:35,531 INFO L93 Difference]: Finished difference Result 388909 states and 578138 transitions. [2022-01-10 06:47:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 06:47:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-01-10 06:47:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:36,225 INFO L225 Difference]: With dead ends: 388909 [2022-01-10 06:47:36,225 INFO L226 Difference]: Without dead ends: 257545 [2022-01-10 06:47:36,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 81 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 06:47:36,354 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 324 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:36,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 435 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:36,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257545 states. [2022-01-10 06:47:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257545 to 194231. [2022-01-10 06:47:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194231 states, 194230 states have (on average 1.4721670184832416) internal successors, (285939), 194230 states have internal predecessors, (285939), 0 states have call successors, (0), 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 06:47:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194231 states to 194231 states and 285939 transitions. [2022-01-10 06:47:43,625 INFO L78 Accepts]: Start accepts. Automaton has 194231 states and 285939 transitions. Word has length 84 [2022-01-10 06:47:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:47:43,626 INFO L470 AbstractCegarLoop]: Abstraction has 194231 states and 285939 transitions. [2022-01-10 06:47:43,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 06:47:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 194231 states and 285939 transitions. [2022-01-10 06:47:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 06:47:43,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:47:43,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:47:43,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 06:47:43,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 06:47:43,832 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:47:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:47:43,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1561363380, now seen corresponding path program 1 times [2022-01-10 06:47:43,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:47:43,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670141175] [2022-01-10 06:47:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:47:43,833 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:47:43,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:47:43,834 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 06:47:43,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 06:47:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:47:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:47:43,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:47:44,212 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 06:47:44,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:47:44,213 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:47:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670141175] [2022-01-10 06:47:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670141175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:47:44,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:47:44,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:47:44,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506688619] [2022-01-10 06:47:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:47:44,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:47:44,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:47:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:47:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:44,214 INFO L87 Difference]: Start difference. First operand 194231 states and 285939 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 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 06:47:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:47:53,241 INFO L93 Difference]: Finished difference Result 516351 states and 766455 transitions. [2022-01-10 06:47:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:47:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2022-01-10 06:47:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:47:53,978 INFO L225 Difference]: With dead ends: 516351 [2022-01-10 06:47:53,979 INFO L226 Difference]: Without dead ends: 323153 [2022-01-10 06:47:54,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:47:54,112 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 434 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:47:54,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 669 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:47:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323153 states.