/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/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 04:11:04,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 04:11:04,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 04:11:04,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 04:11:04,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 04:11:04,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 04:11:04,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 04:11:04,895 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 04:11:04,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 04:11:04,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 04:11:04,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 04:11:04,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 04:11:04,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 04:11:04,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 04:11:04,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 04:11:04,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 04:11:04,911 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 04:11:04,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 04:11:04,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 04:11:04,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 04:11:04,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 04:11:04,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 04:11:04,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 04:11:04,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 04:11:04,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:11:04,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 04:11:04,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 04:11:04,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 04:11:04,914 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 04:11:04,914 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 04:11:04,914 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 04:11:04,914 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 04:11:04,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 04:11:04,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 04:11:04,914 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 04:11:05,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 04:11:05,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 04:11:05,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 04:11:05,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 04:11:05,098 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 04:11:05,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2022-01-10 04:11:05,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15039e7c4/4c75ca65ae954bd6ab851572151370c6/FLAGc139b1888 [2022-01-10 04:11:05,520 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 04:11:05,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2022-01-10 04:11:05,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15039e7c4/4c75ca65ae954bd6ab851572151370c6/FLAGc139b1888 [2022-01-10 04:11:05,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15039e7c4/4c75ca65ae954bd6ab851572151370c6 [2022-01-10 04:11:05,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 04:11:05,946 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 04:11:05,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 04:11:05,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 04:11:05,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 04:11:05,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:11:05" (1/1) ... [2022-01-10 04:11:05,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24bd91fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:05, skipping insertion in model container [2022-01-10 04:11:05,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:11:05" (1/1) ... [2022-01-10 04:11:05,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 04:11:05,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 04:11:06,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c[2544,2557] [2022-01-10 04:11:06,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:11:06,102 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 04:11:06,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c[2544,2557] [2022-01-10 04:11:06,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 04:11:06,124 INFO L208 MainTranslator]: Completed translation [2022-01-10 04:11:06,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06 WrapperNode [2022-01-10 04:11:06,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 04:11:06,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 04:11:06,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 04:11:06,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 04:11:06,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,146 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 87 [2022-01-10 04:11:06,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 04:11:06,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 04:11:06,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 04:11:06,148 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 04:11:06,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 04:11:06,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 04:11:06,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 04:11:06,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 04:11:06,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (1/1) ... [2022-01-10 04:11:06,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 04:11:06,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 04:11:06,204 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 04:11:06,205 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 04:11:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 04:11:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 04:11:06,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 04:11:06,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 04:11:06,280 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 04:11:06,281 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 04:11:06,362 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 04:11:06,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 04:11:06,366 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 04:11:06,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:11:06 BoogieIcfgContainer [2022-01-10 04:11:06,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 04:11:06,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 04:11:06,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 04:11:06,371 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 04:11:06,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:11:05" (1/3) ... [2022-01-10 04:11:06,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38541f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:11:06, skipping insertion in model container [2022-01-10 04:11:06,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:11:06" (2/3) ... [2022-01-10 04:11:06,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38541f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:11:06, skipping insertion in model container [2022-01-10 04:11:06,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:11:06" (3/3) ... [2022-01-10 04:11:06,372 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2022-01-10 04:11:06,376 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 04:11:06,376 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 04:11:06,412 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 04:11:06,417 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 04:11:06,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 04:11:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:06,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 04:11:06,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:06,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:06,440 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:06,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash -721193823, now seen corresponding path program 1 times [2022-01-10 04:11:06,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:06,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270058876] [2022-01-10 04:11:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:06,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:06,467 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 04:11:06,499 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 04:11:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:06,634 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 04:11:06,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:06,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:06,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270058876] [2022-01-10 04:11:06,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270058876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:06,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:06,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:06,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746030222] [2022-01-10 04:11:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:06,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:06,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:06,663 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:06,704 INFO L93 Difference]: Finished difference Result 59 states and 97 transitions. [2022-01-10 04:11:06,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:06,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 04:11:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:06,713 INFO L225 Difference]: With dead ends: 59 [2022-01-10 04:11:06,713 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 04:11:06,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 04:11:06,728 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:06,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 91 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 04:11:06,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-01-10 04:11:06,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 54 transitions. [2022-01-10 04:11:06,761 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 54 transitions. Word has length 13 [2022-01-10 04:11:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:06,761 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 54 transitions. [2022-01-10 04:11:06,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 54 transitions. [2022-01-10 04:11:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 04:11:06,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:06,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:06,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 04:11:06,969 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 04:11:06,969 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:06,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash -41135453, now seen corresponding path program 1 times [2022-01-10 04:11:06,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935471910] [2022-01-10 04:11:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:06,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:06,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:06,972 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 04:11:06,974 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 04:11:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:07,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:07,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:07,042 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 04:11:07,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:07,043 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:07,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935471910] [2022-01-10 04:11:07,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935471910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:07,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:07,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:07,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924215592] [2022-01-10 04:11:07,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:07,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:07,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:07,045 INFO L87 Difference]: Start difference. First operand 31 states and 54 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:07,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:07,065 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2022-01-10 04:11:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:07,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 04:11:07,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:07,067 INFO L225 Difference]: With dead ends: 74 [2022-01-10 04:11:07,067 INFO L226 Difference]: Without dead ends: 45 [2022-01-10 04:11:07,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 04:11:07,068 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 28 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:07,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 87 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-10 04:11:07,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-01-10 04:11:07,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 42 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 74 transitions. [2022-01-10 04:11:07,078 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 74 transitions. Word has length 13 [2022-01-10 04:11:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:07,079 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 74 transitions. [2022-01-10 04:11:07,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 74 transitions. [2022-01-10 04:11:07,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 04:11:07,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:07,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:07,098 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 04:11:07,287 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 04:11:07,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:07,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:07,289 INFO L85 PathProgramCache]: Analyzing trace with hash -881957389, now seen corresponding path program 1 times [2022-01-10 04:11:07,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:07,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060980536] [2022-01-10 04:11:07,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:07,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:07,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:07,292 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 04:11:07,294 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 04:11:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:07,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:07,341 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 04:11:07,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:07,342 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:07,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060980536] [2022-01-10 04:11:07,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060980536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:07,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:07,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:07,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282518369] [2022-01-10 04:11:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:07,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:07,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:07,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:07,344 INFO L87 Difference]: Start difference. First operand 43 states and 74 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:11:07,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:07,353 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2022-01-10 04:11:07,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 04:11:07,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:07,354 INFO L225 Difference]: With dead ends: 69 [2022-01-10 04:11:07,354 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 04:11:07,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 04:11:07,355 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:07,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 96 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 04:11:07,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-01-10 04:11:07,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 0 states have call successors, (0), 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 04:11:07,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 76 transitions. [2022-01-10 04:11:07,359 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 76 transitions. Word has length 14 [2022-01-10 04:11:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:07,360 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 76 transitions. [2022-01-10 04:11:07,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:11:07,360 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 76 transitions. [2022-01-10 04:11:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 04:11:07,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:07,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:07,373 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 04:11:07,566 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 04:11:07,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:07,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1274984399, now seen corresponding path program 1 times [2022-01-10 04:11:07,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:07,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523734303] [2022-01-10 04:11:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:07,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:07,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:07,570 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 04:11:07,571 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 04:11:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:07,632 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 04:11:07,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:07,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:07,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523734303] [2022-01-10 04:11:07,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523734303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:07,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:07,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:07,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221524120] [2022-01-10 04:11:07,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:07,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:07,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:07,634 INFO L87 Difference]: Start difference. First operand 46 states and 76 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:11:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:07,645 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2022-01-10 04:11:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 04:11:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:07,646 INFO L225 Difference]: With dead ends: 85 [2022-01-10 04:11:07,646 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 04:11:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 04:11:07,647 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:07,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 77 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 04:11:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-01-10 04:11:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 0 states have call successors, (0), 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 04:11:07,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 101 transitions. [2022-01-10 04:11:07,652 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 101 transitions. Word has length 14 [2022-01-10 04:11:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:07,652 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 101 transitions. [2022-01-10 04:11:07,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:11:07,653 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 101 transitions. [2022-01-10 04:11:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 04:11:07,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:07,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:07,663 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 04:11:07,861 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 04:11:07,862 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -594926029, now seen corresponding path program 1 times [2022-01-10 04:11:07,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:07,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19695223] [2022-01-10 04:11:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:07,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:07,864 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 04:11:07,868 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 04:11:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:07,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:07,927 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 04:11:07,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:07,927 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:07,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19695223] [2022-01-10 04:11:07,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19695223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:07,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:07,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:07,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558660135] [2022-01-10 04:11:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:07,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:07,929 INFO L87 Difference]: Start difference. First operand 61 states and 101 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:11:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:07,937 INFO L93 Difference]: Finished difference Result 141 states and 235 transitions. [2022-01-10 04:11:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 04:11:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:07,938 INFO L225 Difference]: With dead ends: 141 [2022-01-10 04:11:07,938 INFO L226 Difference]: Without dead ends: 85 [2022-01-10 04:11:07,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 04:11:07,939 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 27 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:07,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 88 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-10 04:11:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-01-10 04:11:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.646341463414634) internal successors, (135), 82 states have internal predecessors, (135), 0 states have call successors, (0), 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 04:11:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 135 transitions. [2022-01-10 04:11:07,944 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 135 transitions. Word has length 14 [2022-01-10 04:11:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:07,944 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 135 transitions. [2022-01-10 04:11:07,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:11:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 135 transitions. [2022-01-10 04:11:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 04:11:07,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:07,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:07,961 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 04:11:08,153 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 04:11:08,154 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -869595720, now seen corresponding path program 1 times [2022-01-10 04:11:08,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302083487] [2022-01-10 04:11:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:08,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:08,156 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 04:11:08,157 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 04:11:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:08,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:08,211 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 04:11:08,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:08,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302083487] [2022-01-10 04:11:08,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302083487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:08,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:08,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:08,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36916719] [2022-01-10 04:11:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:08,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:08,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:08,213 INFO L87 Difference]: Start difference. First operand 83 states and 135 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:11:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:08,226 INFO L93 Difference]: Finished difference Result 126 states and 202 transitions. [2022-01-10 04:11:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 04:11:08,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:08,230 INFO L225 Difference]: With dead ends: 126 [2022-01-10 04:11:08,230 INFO L226 Difference]: Without dead ends: 87 [2022-01-10 04:11:08,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 04:11:08,234 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:08,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 92 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:08,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-10 04:11:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-01-10 04:11:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.6071428571428572) internal successors, (135), 84 states have internal predecessors, (135), 0 states have call successors, (0), 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 04:11:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 135 transitions. [2022-01-10 04:11:08,245 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 135 transitions. Word has length 15 [2022-01-10 04:11:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:08,245 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 135 transitions. [2022-01-10 04:11:08,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:11:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 135 transitions. [2022-01-10 04:11:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 04:11:08,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:08,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:08,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:08,450 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 04:11:08,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:08,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1262622730, now seen corresponding path program 1 times [2022-01-10 04:11:08,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:08,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201672020] [2022-01-10 04:11:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:08,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:08,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:08,453 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 04:11:08,454 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 04:11:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:08,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:08,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:08,502 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 04:11:08,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:08,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:08,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201672020] [2022-01-10 04:11:08,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201672020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:08,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:08,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:08,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722405947] [2022-01-10 04:11:08,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:08,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:08,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:08,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:08,504 INFO L87 Difference]: Start difference. First operand 85 states and 135 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:11:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:08,513 INFO L93 Difference]: Finished difference Result 237 states and 377 transitions. [2022-01-10 04:11:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 04:11:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:08,514 INFO L225 Difference]: With dead ends: 237 [2022-01-10 04:11:08,514 INFO L226 Difference]: Without dead ends: 159 [2022-01-10 04:11:08,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 04:11:08,515 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:08,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 79 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:08,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-10 04:11:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-01-10 04:11:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5576923076923077) internal successors, (243), 156 states have internal predecessors, (243), 0 states have call successors, (0), 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 04:11:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 243 transitions. [2022-01-10 04:11:08,529 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 243 transitions. Word has length 15 [2022-01-10 04:11:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:08,530 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 243 transitions. [2022-01-10 04:11:08,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:11:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 243 transitions. [2022-01-10 04:11:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 04:11:08,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:08,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:08,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 04:11:08,740 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 04:11:08,743 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1942681100, now seen corresponding path program 1 times [2022-01-10 04:11:08,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978578669] [2022-01-10 04:11:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:08,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:08,745 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 04:11:08,746 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 04:11:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:08,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:08,807 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 04:11:08,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:08,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:08,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978578669] [2022-01-10 04:11:08,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978578669] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:08,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:08,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:08,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354218066] [2022-01-10 04:11:08,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:08,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:08,809 INFO L87 Difference]: Start difference. First operand 157 states and 243 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:11:08,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:08,817 INFO L93 Difference]: Finished difference Result 193 states and 301 transitions. [2022-01-10 04:11:08,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:08,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 04:11:08,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:08,819 INFO L225 Difference]: With dead ends: 193 [2022-01-10 04:11:08,819 INFO L226 Difference]: Without dead ends: 191 [2022-01-10 04:11:08,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 04:11:08,819 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:08,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 98 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-10 04:11:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 157. [2022-01-10 04:11:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5320512820512822) internal successors, (239), 156 states have internal predecessors, (239), 0 states have call successors, (0), 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 04:11:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 239 transitions. [2022-01-10 04:11:08,825 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 239 transitions. Word has length 15 [2022-01-10 04:11:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:08,825 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 239 transitions. [2022-01-10 04:11:08,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:11:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 239 transitions. [2022-01-10 04:11:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 04:11:08,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:08,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:08,850 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 04:11:09,043 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 04:11:09,044 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash -486383640, now seen corresponding path program 1 times [2022-01-10 04:11:09,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:09,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810448917] [2022-01-10 04:11:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:09,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:09,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:09,046 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 04:11:09,047 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 04:11:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:09,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:09,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:09,107 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 04:11:09,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:09,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:09,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810448917] [2022-01-10 04:11:09,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810448917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:09,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:09,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:09,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745547626] [2022-01-10 04:11:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:09,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:09,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:09,109 INFO L87 Difference]: Start difference. First operand 157 states and 239 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:11:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:09,120 INFO L93 Difference]: Finished difference Result 277 states and 425 transitions. [2022-01-10 04:11:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-01-10 04:11:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:09,122 INFO L225 Difference]: With dead ends: 277 [2022-01-10 04:11:09,122 INFO L226 Difference]: Without dead ends: 275 [2022-01-10 04:11:09,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 04:11:09,124 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:09,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-10 04:11:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2022-01-10 04:11:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4955357142857142) internal successors, (335), 224 states have internal predecessors, (335), 0 states have call successors, (0), 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 04:11:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 335 transitions. [2022-01-10 04:11:09,134 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 335 transitions. Word has length 16 [2022-01-10 04:11:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:09,134 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 335 transitions. [2022-01-10 04:11:09,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:11:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 335 transitions. [2022-01-10 04:11:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 04:11:09,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:09,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:09,154 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 04:11:09,345 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 04:11:09,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:09,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 193674730, now seen corresponding path program 1 times [2022-01-10 04:11:09,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:09,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339156657] [2022-01-10 04:11:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:09,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:09,348 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 04:11:09,350 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 04:11:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:09,402 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 04:11:09,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:09,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339156657] [2022-01-10 04:11:09,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339156657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:09,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:09,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:09,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783810482] [2022-01-10 04:11:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:09,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:09,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:09,412 INFO L87 Difference]: Start difference. First operand 225 states and 335 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:11:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:09,427 INFO L93 Difference]: Finished difference Result 517 states and 769 transitions. [2022-01-10 04:11:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-01-10 04:11:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:09,429 INFO L225 Difference]: With dead ends: 517 [2022-01-10 04:11:09,429 INFO L226 Difference]: Without dead ends: 299 [2022-01-10 04:11:09,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 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 04:11:09,432 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:09,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 90 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-10 04:11:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-01-10 04:11:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.4425675675675675) internal successors, (427), 296 states have internal predecessors, (427), 0 states have call successors, (0), 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 04:11:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 427 transitions. [2022-01-10 04:11:09,442 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 427 transitions. Word has length 16 [2022-01-10 04:11:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:09,443 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 427 transitions. [2022-01-10 04:11:09,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 04:11:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 427 transitions. [2022-01-10 04:11:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 04:11:09,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:09,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:09,455 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 04:11:09,650 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 04:11:09,650 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2102192011, now seen corresponding path program 1 times [2022-01-10 04:11:09,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:09,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508077411] [2022-01-10 04:11:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:09,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:09,652 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 04:11:09,653 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 04:11:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:09,697 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 04:11:09,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:09,698 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:09,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508077411] [2022-01-10 04:11:09,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508077411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:09,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:09,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:09,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275710060] [2022-01-10 04:11:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:09,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:09,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:09,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:09,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:09,699 INFO L87 Difference]: Start difference. First operand 297 states and 427 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:09,709 INFO L93 Difference]: Finished difference Result 453 states and 649 transitions. [2022-01-10 04:11:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 04:11:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:09,710 INFO L225 Difference]: With dead ends: 453 [2022-01-10 04:11:09,710 INFO L226 Difference]: Without dead ends: 311 [2022-01-10 04:11:09,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 04:11:09,711 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 27 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:09,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 84 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-10 04:11:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-01-10 04:11:09,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.4123376623376624) internal successors, (435), 308 states have internal predecessors, (435), 0 states have call successors, (0), 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 04:11:09,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 435 transitions. [2022-01-10 04:11:09,718 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 435 transitions. Word has length 17 [2022-01-10 04:11:09,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:09,719 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 435 transitions. [2022-01-10 04:11:09,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:09,719 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 435 transitions. [2022-01-10 04:11:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 04:11:09,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:09,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:09,743 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 04:11:09,928 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 04:11:09,928 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1709165001, now seen corresponding path program 1 times [2022-01-10 04:11:09,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:09,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377091157] [2022-01-10 04:11:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:09,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:09,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:09,930 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 04:11:09,931 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 04:11:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:09,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:09,975 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 04:11:09,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:09,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:09,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377091157] [2022-01-10 04:11:09,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377091157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:09,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:09,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:09,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616380667] [2022-01-10 04:11:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:09,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:09,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:09,976 INFO L87 Difference]: Start difference. First operand 309 states and 435 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:09,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:09,987 INFO L93 Difference]: Finished difference Result 521 states and 733 transitions. [2022-01-10 04:11:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:09,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 04:11:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:09,989 INFO L225 Difference]: With dead ends: 521 [2022-01-10 04:11:09,989 INFO L226 Difference]: Without dead ends: 519 [2022-01-10 04:11:09,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 04:11:09,990 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:09,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-10 04:11:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 453. [2022-01-10 04:11:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.3694690265486726) internal successors, (619), 452 states have internal predecessors, (619), 0 states have call successors, (0), 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 04:11:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 619 transitions. [2022-01-10 04:11:09,998 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 619 transitions. Word has length 17 [2022-01-10 04:11:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:09,999 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 619 transitions. [2022-01-10 04:11:09,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 619 transitions. [2022-01-10 04:11:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 04:11:09,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:09,999 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:10,007 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 04:11:10,205 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 04:11:10,206 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1905743925, now seen corresponding path program 1 times [2022-01-10 04:11:10,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:10,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350828059] [2022-01-10 04:11:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:10,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:10,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:10,207 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 04:11:10,209 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 04:11:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:10,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:10,246 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 04:11:10,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:10,246 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:10,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350828059] [2022-01-10 04:11:10,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350828059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:10,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:10,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:10,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401977322] [2022-01-10 04:11:10,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:10,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:10,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:10,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:10,248 INFO L87 Difference]: Start difference. First operand 453 states and 619 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:10,265 INFO L93 Difference]: Finished difference Result 1017 states and 1373 transitions. [2022-01-10 04:11:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-10 04:11:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:10,267 INFO L225 Difference]: With dead ends: 1017 [2022-01-10 04:11:10,267 INFO L226 Difference]: Without dead ends: 583 [2022-01-10 04:11:10,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 04:11:10,268 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:10,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 91 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:10,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-10 04:11:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 581. [2022-01-10 04:11:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.3017241379310345) internal successors, (755), 580 states have internal predecessors, (755), 0 states have call successors, (0), 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 04:11:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 755 transitions. [2022-01-10 04:11:10,281 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 755 transitions. Word has length 17 [2022-01-10 04:11:10,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:10,282 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 755 transitions. [2022-01-10 04:11:10,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 04:11:10,282 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 755 transitions. [2022-01-10 04:11:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 04:11:10,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:10,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:10,303 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 04:11:10,491 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 04:11:10,491 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:10,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1444723487, now seen corresponding path program 1 times [2022-01-10 04:11:10,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052759227] [2022-01-10 04:11:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:10,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:10,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:10,494 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 04:11:10,495 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 04:11:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:10,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:10,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:10,544 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 04:11:10,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:10,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052759227] [2022-01-10 04:11:10,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052759227] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:10,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:10,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:10,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839893108] [2022-01-10 04:11:10,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:10,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:10,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:10,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:10,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:10,546 INFO L87 Difference]: Start difference. First operand 581 states and 755 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 04:11:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:10,565 INFO L93 Difference]: Finished difference Result 873 states and 1125 transitions. [2022-01-10 04:11:10,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-01-10 04:11:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:10,567 INFO L225 Difference]: With dead ends: 873 [2022-01-10 04:11:10,567 INFO L226 Difference]: Without dead ends: 599 [2022-01-10 04:11:10,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 04:11:10,569 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 26 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:10,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-10 04:11:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2022-01-10 04:11:10,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.266778523489933) internal successors, (755), 596 states have internal predecessors, (755), 0 states have call successors, (0), 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 04:11:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 755 transitions. [2022-01-10 04:11:10,613 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 755 transitions. Word has length 18 [2022-01-10 04:11:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:10,614 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 755 transitions. [2022-01-10 04:11:10,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 04:11:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 755 transitions. [2022-01-10 04:11:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 04:11:10,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:10,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:10,644 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 04:11:10,837 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 04:11:10,837 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1051696477, now seen corresponding path program 1 times [2022-01-10 04:11:10,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:10,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946978340] [2022-01-10 04:11:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:10,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:10,839 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 04:11:10,841 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 04:11:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:10,904 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 04:11:10,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:10,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946978340] [2022-01-10 04:11:10,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946978340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:10,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:10,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:10,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454253636] [2022-01-10 04:11:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:10,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:10,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:10,906 INFO L87 Difference]: Start difference. First operand 597 states and 755 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 04:11:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:10,923 INFO L93 Difference]: Finished difference Result 967 states and 1204 transitions. [2022-01-10 04:11:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-01-10 04:11:10,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:10,926 INFO L225 Difference]: With dead ends: 967 [2022-01-10 04:11:10,926 INFO L226 Difference]: Without dead ends: 965 [2022-01-10 04:11:10,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 04:11:10,927 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:10,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-01-10 04:11:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 901. [2022-01-10 04:11:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.23) internal successors, (1107), 900 states have internal predecessors, (1107), 0 states have call successors, (0), 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 04:11:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1107 transitions. [2022-01-10 04:11:10,946 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1107 transitions. Word has length 18 [2022-01-10 04:11:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:10,946 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1107 transitions. [2022-01-10 04:11:10,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 04:11:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1107 transitions. [2022-01-10 04:11:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 04:11:10,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 04:11:10,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:10,982 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 04:11:11,153 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 04:11:11,153 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 04:11:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 04:11:11,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1731754847, now seen corresponding path program 1 times [2022-01-10 04:11:11,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 04:11:11,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917740232] [2022-01-10 04:11:11,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 04:11:11,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 04:11:11,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 04:11:11,158 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 04:11:11,160 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 04:11:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 04:11:11,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 04:11:11,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 04:11:11,211 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 04:11:11,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 04:11:11,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 04:11:11,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917740232] [2022-01-10 04:11:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917740232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 04:11:11,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 04:11:11,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 04:11:11,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266042158] [2022-01-10 04:11:11,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 04:11:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 04:11:11,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 04:11:11,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 04:11:11,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 04:11:11,213 INFO L87 Difference]: Start difference. First operand 901 states and 1107 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 04:11:11,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 04:11:11,233 INFO L93 Difference]: Finished difference Result 1989 states and 2387 transitions. [2022-01-10 04:11:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 04:11:11,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-01-10 04:11:11,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 04:11:11,234 INFO L225 Difference]: With dead ends: 1989 [2022-01-10 04:11:11,234 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 04:11:11,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 04:11:11,235 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 04:11:11,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 04:11:11,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 04:11:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 04:11:11,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 04:11:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 04:11:11,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2022-01-10 04:11:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 04:11:11,237 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 04:11:11,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 04:11:11,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 04:11:11,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 04:11:11,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-10 04:11:11,254 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 04:11:11,452 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 04:11:11,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-10 04:11:11,464 INFO L858 garLoopResultBuilder]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,464 INFO L858 garLoopResultBuilder]: For program point L85(line 85) no Hoare annotation was computed. [2022-01-10 04:11:11,464 INFO L858 garLoopResultBuilder]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,464 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-01-10 04:11:11,464 INFO L858 garLoopResultBuilder]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L95(line 95) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L80(line 80) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L861 garLoopResultBuilder]: At program point L105(lines 7 109) the Hoare annotation is: true [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L31(lines 31 33) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L48(lines 48 50) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-01-10 04:11:11,465 INFO L858 garLoopResultBuilder]: For program point L90(line 90) no Hoare annotation was computed. [2022-01-10 04:11:11,466 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 107) no Hoare annotation was computed. [2022-01-10 04:11:11,466 INFO L858 garLoopResultBuilder]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,466 INFO L861 garLoopResultBuilder]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2022-01-10 04:11:11,466 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-10 04:11:11,466 INFO L861 garLoopResultBuilder]: At program point L108(lines 6 109) the Hoare annotation is: true [2022-01-10 04:11:11,466 INFO L858 garLoopResultBuilder]: For program point L75(line 75) no Hoare annotation was computed. [2022-01-10 04:11:11,466 INFO L858 garLoopResultBuilder]: For program point L100(line 100) no Hoare annotation was computed. [2022-01-10 04:11:11,466 INFO L854 garLoopResultBuilder]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2022-01-10 04:11:11,466 INFO L858 garLoopResultBuilder]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,467 INFO L858 garLoopResultBuilder]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2022-01-10 04:11:11,469 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 04:11:11,470 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-10 04:11:11,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 04:11:11 BoogieIcfgContainer [2022-01-10 04:11:11,478 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-10 04:11:11,479 INFO L158 Benchmark]: Toolchain (without parser) took 5532.73ms. Allocated memory was 190.8MB in the beginning and 326.1MB in the end (delta: 135.3MB). Free memory was 134.5MB in the beginning and 251.2MB in the end (delta: -116.7MB). Peak memory consumption was 18.3MB. Max. memory is 8.0GB. [2022-01-10 04:11:11,479 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 190.8MB. Free memory is still 151.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-10 04:11:11,479 INFO L158 Benchmark]: CACSL2BoogieTranslator took 176.95ms. Allocated memory was 190.8MB in the beginning and 326.1MB in the end (delta: 135.3MB). Free memory was 134.3MB in the beginning and 298.5MB in the end (delta: -164.2MB). Peak memory consumption was 6.8MB. Max. memory is 8.0GB. [2022-01-10 04:11:11,479 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.36ms. Allocated memory is still 326.1MB. Free memory was 298.0MB in the beginning and 296.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 04:11:11,480 INFO L158 Benchmark]: Boogie Preprocessor took 14.80ms. Allocated memory is still 326.1MB. Free memory was 296.9MB in the beginning and 295.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-10 04:11:11,480 INFO L158 Benchmark]: RCFGBuilder took 204.07ms. Allocated memory is still 326.1MB. Free memory was 295.4MB in the beginning and 283.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-10 04:11:11,480 INFO L158 Benchmark]: TraceAbstraction took 5109.80ms. Allocated memory is still 326.1MB. Free memory was 283.3MB in the beginning and 251.2MB in the end (delta: 32.1MB). Peak memory consumption was 31.6MB. Max. memory is 8.0GB. [2022-01-10 04:11:11,481 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 190.8MB. Free memory is still 151.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 176.95ms. Allocated memory was 190.8MB in the beginning and 326.1MB in the end (delta: 135.3MB). Free memory was 134.3MB in the beginning and 298.5MB in the end (delta: -164.2MB). Peak memory consumption was 6.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.36ms. Allocated memory is still 326.1MB. Free memory was 298.0MB in the beginning and 296.9MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.80ms. Allocated memory is still 326.1MB. Free memory was 296.9MB in the beginning and 295.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 204.07ms. Allocated memory is still 326.1MB. Free memory was 295.4MB in the beginning and 283.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 5109.80ms. Allocated memory is still 326.1MB. Free memory was 283.3MB in the beginning and 251.2MB in the end (delta: 32.1MB). Peak memory consumption was 31.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 107]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 16, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 391 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 391 mSDsluCounter, 1355 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 527 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85 IncrementalHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 828 mSDtfsCounter, 85 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 234 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=901occurred in iteration=15, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 73 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 250 NumberOfCodeBlocks, 250 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 234 ConstructedInterpolants, 0 QuantifiedInterpolants, 462 SizeOfPredicates, 0 NumberOfNonLiveVariables, 600 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2022-01-10 04:11:11,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...