/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/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:00:21,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:00:21,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:00:21,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:00:21,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:00:21,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:00:21,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:00:21,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:00:21,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:00:21,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:00:21,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:00:21,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:00:21,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:00:21,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:00:21,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:00:21,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:00:21,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:00:21,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:00:21,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:00:21,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:00:21,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:00:21,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:00:21,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:00:21,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:00:21,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:00:21,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:00:21,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:00:21,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:00:21,373 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 08:00:21,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:00:21,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:00:21,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:00:21,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:00:21,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:00:21,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:00:21,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:00:21,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:00:21,419 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:00:21,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:00:21,420 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:00:21,421 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:00:21,421 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:00:21,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:00:21,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:00:21,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:00:21,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:00:21,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:00:21,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:00:21,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:00:21,435 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:00:21,436 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:00:21,436 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:00:21,436 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:00:21,436 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:00:21,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:00:21,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:00:21,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:00:21,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:00:21,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:00:21,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:00:21,868 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:00:21,868 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:00:21,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c [2022-01-10 08:00:21,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec71dd4e/c60afa7bc4d6417d987e2d39b95c7ee2/FLAG072b0a858 [2022-01-10 08:00:22,528 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:00:22,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c [2022-01-10 08:00:22,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec71dd4e/c60afa7bc4d6417d987e2d39b95c7ee2/FLAG072b0a858 [2022-01-10 08:00:22,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ec71dd4e/c60afa7bc4d6417d987e2d39b95c7ee2 [2022-01-10 08:00:22,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:00:22,671 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:00:22,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:00:22,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:00:22,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:00:22,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:00:22" (1/1) ... [2022-01-10 08:00:22,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ab2ef62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:22, skipping insertion in model container [2022-01-10 08:00:22,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:00:22" (1/1) ... [2022-01-10 08:00:22,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:00:22,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:00:23,044 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c[6354,6367] [2022-01-10 08:00:23,067 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c[9861,9874] [2022-01-10 08:00:23,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:00:23,607 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:00:23,633 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c[6354,6367] [2022-01-10 08:00:23,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c[9861,9874] [2022-01-10 08:00:24,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:00:24,069 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:00:24,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24 WrapperNode [2022-01-10 08:00:24,070 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:00:24,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:00:24,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:00:24,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:00:24,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,226 INFO L137 Inliner]: procedures = 34, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4957 [2022-01-10 08:00:24,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:00:24,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:00:24,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:00:24,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:00:24,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:00:24,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:00:24,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:00:24,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:00:24,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (1/1) ... [2022-01-10 08:00:24,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:00:24,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:00:24,477 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 08:00:24,479 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 08:00:24,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:00:24,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:00:24,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:00:24,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:00:24,633 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:00:24,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:00:47,246 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:00:47,283 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:00:47,284 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 08:00:47,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:00:47 BoogieIcfgContainer [2022-01-10 08:00:47,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:00:47,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:00:47,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:00:47,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:00:47,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:00:22" (1/3) ... [2022-01-10 08:00:47,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d003e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:00:47, skipping insertion in model container [2022-01-10 08:00:47,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:00:24" (2/3) ... [2022-01-10 08:00:47,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d003e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:00:47, skipping insertion in model container [2022-01-10 08:00:47,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:00:47" (3/3) ... [2022-01-10 08:00:47,312 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label08.c [2022-01-10 08:00:47,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:00:47,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:00:47,396 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:00:47,419 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 08:00:47,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:00:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 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 08:00:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 08:00:47,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:47,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:47,457 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2022-01-10 08:00:47,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:47,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961592569] [2022-01-10 08:00:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:47,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:47,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:47,477 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 08:00:47,479 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 08:00:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 08:00:47,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:47,729 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 08:00:47,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:47,730 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:47,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961592569] [2022-01-10 08:00:47,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961592569] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:47,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:47,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:00:47,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560485071] [2022-01-10 08:00:47,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:47,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 08:00:47,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 08:00:47,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:00:47,785 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:00:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:47,862 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2022-01-10 08:00:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 08:00:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 08:00:47,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:47,883 INFO L225 Difference]: With dead ends: 1734 [2022-01-10 08:00:47,884 INFO L226 Difference]: Without dead ends: 812 [2022-01-10 08:00:47,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:00:47,912 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:47,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-10 08:00:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-01-10 08:00:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 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 08:00:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2022-01-10 08:00:47,993 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2022-01-10 08:00:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:47,993 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2022-01-10 08:00:47,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:00:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2022-01-10 08:00:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 08:00:47,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:47,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:48,016 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 08:00:48,220 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 08:00:48,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:48,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2022-01-10 08:00:48,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:48,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13417705] [2022-01-10 08:00:48,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:48,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:48,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:48,253 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 08:00:48,254 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 08:00:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:48,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:00:48,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:48,419 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 08:00:48,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:48,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13417705] [2022-01-10 08:00:48,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13417705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:48,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:48,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:00:48,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624864410] [2022-01-10 08:00:48,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:48,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:00:48,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:48,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:00:48,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:00:48,422 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:00:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:00:48,503 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2022-01-10 08:00:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:00:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 08:00:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:00:48,507 INFO L225 Difference]: With dead ends: 888 [2022-01-10 08:00:48,507 INFO L226 Difference]: Without dead ends: 848 [2022-01-10 08:00:48,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:00:48,508 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:00:48,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:00:48,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-10 08:00:48,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2022-01-10 08:00:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 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 08:00:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2022-01-10 08:00:48,523 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2022-01-10 08:00:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:00:48,524 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2022-01-10 08:00:48,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:00:48,524 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2022-01-10 08:00:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 08:00:48,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:00:48,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:00:48,534 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 08:00:48,731 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 08:00:48,732 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:00:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:00:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1133051629, now seen corresponding path program 1 times [2022-01-10 08:00:48,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:00:48,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202273013] [2022-01-10 08:00:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:00:48,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:00:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:00:48,735 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 08:00:48,736 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 08:00:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:00:48,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:00:48,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:00:48,855 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 08:00:48,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:00:48,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:00:48,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202273013] [2022-01-10 08:00:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202273013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:00:48,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:00:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:00:48,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260339891] [2022-01-10 08:00:48,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:00:48,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:00:48,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:00:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:00:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:00:48,857 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:01:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:20,701 INFO L93 Difference]: Finished difference Result 2316 states and 4390 transitions. [2022-01-10 08:01:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:20,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-01-10 08:01:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:20,707 INFO L225 Difference]: With dead ends: 2316 [2022-01-10 08:01:20,707 INFO L226 Difference]: Without dead ends: 1563 [2022-01-10 08:01:20,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 08:01:20,709 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 866 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:20,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 506 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2274 Invalid, 0 Unknown, 0 Unchecked, 31.7s Time] [2022-01-10 08:01:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-01-10 08:01:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2022-01-10 08:01:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.6297245355541319) internal successors, (2544), 1562 states have internal predecessors, (2544), 0 states have call successors, (0), 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 08:01:20,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2544 transitions. [2022-01-10 08:01:20,745 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2544 transitions. Word has length 30 [2022-01-10 08:01:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:20,745 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 2544 transitions. [2022-01-10 08:01:20,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 08:01:20,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2544 transitions. [2022-01-10 08:01:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 08:01:20,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:20,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:20,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-01-10 08:01:20,947 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 08:01:20,947 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:20,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2022-01-10 08:01:20,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:20,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156380953] [2022-01-10 08:01:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:20,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:20,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:20,949 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 08:01:20,951 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 08:01:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:21,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:21,154 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 08:01:21,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:21,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156380953] [2022-01-10 08:01:21,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156380953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:21,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328870973] [2022-01-10 08:01:21,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:21,162 INFO L87 Difference]: Start difference. First operand 1563 states and 2544 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 08:01:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:21,186 INFO L93 Difference]: Finished difference Result 1629 states and 2646 transitions. [2022-01-10 08:01:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:21,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-01-10 08:01:21,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:21,191 INFO L225 Difference]: With dead ends: 1629 [2022-01-10 08:01:21,191 INFO L226 Difference]: Without dead ends: 1593 [2022-01-10 08:01:21,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 39 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 08:01:21,196 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:21,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:21,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-01-10 08:01:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2022-01-10 08:01:21,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1589 states have (on average 1.6286972938955318) internal successors, (2588), 1590 states have internal predecessors, (2588), 0 states have call successors, (0), 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 08:01:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2588 transitions. [2022-01-10 08:01:21,230 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2588 transitions. Word has length 41 [2022-01-10 08:01:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 2588 transitions. [2022-01-10 08:01:21,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 08:01:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2588 transitions. [2022-01-10 08:01:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-10 08:01:21,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:21,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:21,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 08:01:21,444 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 08:01:21,444 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:21,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:21,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2022-01-10 08:01:21,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:21,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189121808] [2022-01-10 08:01:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:21,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:21,446 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 08:01:21,461 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 08:01:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:21,889 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 08:01:21,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:21,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:21,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189121808] [2022-01-10 08:01:21,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189121808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:21,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:21,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:21,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105279832] [2022-01-10 08:01:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:21,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:21,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:21,891 INFO L87 Difference]: Start difference. First operand 1591 states and 2588 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 08:01:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:22,042 INFO L93 Difference]: Finished difference Result 1847 states and 2988 transitions. [2022-01-10 08:01:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-01-10 08:01:22,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:22,049 INFO L225 Difference]: With dead ends: 1847 [2022-01-10 08:01:22,049 INFO L226 Difference]: Without dead ends: 1783 [2022-01-10 08:01:22,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:22,050 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 3091 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3091 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:22,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3091 Valid, 1665 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:22,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-01-10 08:01:22,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1715. [2022-01-10 08:01:22,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1713 states have (on average 1.6228838295388208) internal successors, (2780), 1714 states have internal predecessors, (2780), 0 states have call successors, (0), 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 08:01:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2780 transitions. [2022-01-10 08:01:22,078 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2780 transitions. Word has length 41 [2022-01-10 08:01:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:22,079 INFO L470 AbstractCegarLoop]: Abstraction has 1715 states and 2780 transitions. [2022-01-10 08:01:22,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 08:01:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2780 transitions. [2022-01-10 08:01:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 08:01:22,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:22,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:22,089 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 08:01:22,287 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 08:01:22,288 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:22,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:22,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2022-01-10 08:01:22,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:22,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629257572] [2022-01-10 08:01:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:22,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:22,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:22,290 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 08:01:22,292 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 08:01:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:22,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:22,436 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 08:01:22,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:22,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629257572] [2022-01-10 08:01:22,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629257572] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:22,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:22,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:22,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338592516] [2022-01-10 08:01:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:22,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:22,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:22,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:22,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:22,438 INFO L87 Difference]: Start difference. First operand 1715 states and 2780 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:22,498 INFO L93 Difference]: Finished difference Result 1993 states and 3209 transitions. [2022-01-10 08:01:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:22,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 08:01:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:22,504 INFO L225 Difference]: With dead ends: 1993 [2022-01-10 08:01:22,504 INFO L226 Difference]: Without dead ends: 1805 [2022-01-10 08:01:22,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 08:01:22,506 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:22,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-01-10 08:01:22,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2022-01-10 08:01:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1801 states have (on average 1.6163242642976123) internal successors, (2911), 1802 states have internal predecessors, (2911), 0 states have call successors, (0), 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 08:01:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2911 transitions. [2022-01-10 08:01:22,534 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2911 transitions. Word has length 43 [2022-01-10 08:01:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:22,535 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 2911 transitions. [2022-01-10 08:01:22,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:22,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2911 transitions. [2022-01-10 08:01:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 08:01:22,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:22,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:22,559 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 08:01:22,742 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 08:01:22,743 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:22,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:22,743 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2022-01-10 08:01:22,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:22,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131810336] [2022-01-10 08:01:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:22,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:22,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:22,745 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 08:01:22,746 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 08:01:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:22,869 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 08:01:22,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:22,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131810336] [2022-01-10 08:01:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131810336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:22,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:22,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:22,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625620476] [2022-01-10 08:01:22,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:22,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:22,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:22,871 INFO L87 Difference]: Start difference. First operand 1803 states and 2911 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:22,896 INFO L93 Difference]: Finished difference Result 2297 states and 3663 transitions. [2022-01-10 08:01:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 08:01:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:22,902 INFO L225 Difference]: With dead ends: 2297 [2022-01-10 08:01:22,902 INFO L226 Difference]: Without dead ends: 2023 [2022-01-10 08:01:22,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 08:01:22,903 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:22,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:22,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-01-10 08:01:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2021. [2022-01-10 08:01:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2019 states have (on average 1.6007924715205548) internal successors, (3232), 2020 states have internal predecessors, (3232), 0 states have call successors, (0), 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 08:01:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 3232 transitions. [2022-01-10 08:01:22,933 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 3232 transitions. Word has length 43 [2022-01-10 08:01:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:22,936 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 3232 transitions. [2022-01-10 08:01:22,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 3232 transitions. [2022-01-10 08:01:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 08:01:22,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:22,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:22,950 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 08:01:23,148 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 08:01:23,148 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:23,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2022-01-10 08:01:23,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:23,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232879613] [2022-01-10 08:01:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:23,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:23,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:23,152 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 08:01:23,155 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 08:01:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:23,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:23,331 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 08:01:23,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:23,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232879613] [2022-01-10 08:01:23,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232879613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:23,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:23,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:23,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477124896] [2022-01-10 08:01:23,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:23,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:23,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:23,333 INFO L87 Difference]: Start difference. First operand 2021 states and 3232 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:23,370 INFO L93 Difference]: Finished difference Result 2897 states and 4536 transitions. [2022-01-10 08:01:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-01-10 08:01:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:23,390 INFO L225 Difference]: With dead ends: 2897 [2022-01-10 08:01:23,390 INFO L226 Difference]: Without dead ends: 2405 [2022-01-10 08:01:23,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 08:01:23,409 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:23,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:23,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2022-01-10 08:01:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 2403. [2022-01-10 08:01:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2401 states have (on average 1.5722615576842982) internal successors, (3775), 2402 states have internal predecessors, (3775), 0 states have call successors, (0), 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 08:01:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3775 transitions. [2022-01-10 08:01:23,450 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3775 transitions. Word has length 43 [2022-01-10 08:01:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:23,451 INFO L470 AbstractCegarLoop]: Abstraction has 2403 states and 3775 transitions. [2022-01-10 08:01:23,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3775 transitions. [2022-01-10 08:01:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 08:01:23,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:23,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:23,461 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 08:01:23,658 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 08:01:23,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:23,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:23,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2022-01-10 08:01:23,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:23,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577412094] [2022-01-10 08:01:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:23,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:23,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:23,660 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 08:01:23,662 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 08:01:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:01:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:23,796 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 08:01:23,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:23,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:23,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577412094] [2022-01-10 08:01:23,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577412094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:23,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:23,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:23,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71932232] [2022-01-10 08:01:23,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:23,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:23,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:23,797 INFO L87 Difference]: Start difference. First operand 2403 states and 3775 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 08:01:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:23,888 INFO L93 Difference]: Finished difference Result 3249 states and 4967 transitions. [2022-01-10 08:01:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-01-10 08:01:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:23,897 INFO L225 Difference]: With dead ends: 3249 [2022-01-10 08:01:23,897 INFO L226 Difference]: Without dead ends: 3247 [2022-01-10 08:01:23,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:01:23,899 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:23,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2022-01-10 08:01:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2487. [2022-01-10 08:01:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2485 states have (on average 1.551307847082495) internal successors, (3855), 2486 states have internal predecessors, (3855), 0 states have call successors, (0), 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 08:01:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3855 transitions. [2022-01-10 08:01:23,950 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3855 transitions. Word has length 44 [2022-01-10 08:01:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:23,950 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 3855 transitions. [2022-01-10 08:01:23,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 08:01:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3855 transitions. [2022-01-10 08:01:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:23,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:23,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:23,960 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 08:01:24,157 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 08:01:24,158 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:24,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2022-01-10 08:01:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:24,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171212669] [2022-01-10 08:01:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:24,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:24,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:24,180 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 08:01:24,186 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 08:01:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:01:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:25,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:01:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:25,520 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:25,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171212669] [2022-01-10 08:01:25,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171212669] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:01:25,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:01:25,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:01:25,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9254333] [2022-01-10 08:01:25,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:01:25,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:01:25,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:25,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:01:25,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:01:25,523 INFO L87 Difference]: Start difference. First operand 2487 states and 3855 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 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 08:01:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:25,747 INFO L93 Difference]: Finished difference Result 3184 states and 4857 transitions. [2022-01-10 08:01:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 08:01:25,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 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 64 [2022-01-10 08:01:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:25,770 INFO L225 Difference]: With dead ends: 3184 [2022-01-10 08:01:25,770 INFO L226 Difference]: Without dead ends: 2510 [2022-01-10 08:01:25,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:01:25,772 INFO L933 BasicCegarLoop]: 1502 mSDtfsCounter, 5815 mSDsluCounter, 9030 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5815 SdHoareTripleChecker+Valid, 10532 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:25,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5815 Valid, 10532 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 45 Unchecked, 0.0s Time] [2022-01-10 08:01:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2022-01-10 08:01:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2509. [2022-01-10 08:01:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2507 states have (on average 1.548065416832868) internal successors, (3881), 2508 states have internal predecessors, (3881), 0 states have call successors, (0), 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 08:01:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3881 transitions. [2022-01-10 08:01:25,865 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3881 transitions. Word has length 64 [2022-01-10 08:01:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:25,866 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3881 transitions. [2022-01-10 08:01:25,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 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 08:01:25,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3881 transitions. [2022-01-10 08:01:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:25,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:25,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:25,875 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 08:01:26,073 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 08:01:26,074 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2022-01-10 08:01:26,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:26,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491960407] [2022-01-10 08:01:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:26,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:26,076 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 08:01:26,078 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 08:01:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:26,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:26,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:26,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:26,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:26,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491960407] [2022-01-10 08:01:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491960407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:26,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:26,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:26,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046882930] [2022-01-10 08:01:26,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:26,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:26,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:26,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:26,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:26,264 INFO L87 Difference]: Start difference. First operand 2509 states and 3881 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:01:26,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:26,321 INFO L93 Difference]: Finished difference Result 3469 states and 5247 transitions. [2022-01-10 08:01:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:26,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-01-10 08:01:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:26,333 INFO L225 Difference]: With dead ends: 3469 [2022-01-10 08:01:26,333 INFO L226 Difference]: Without dead ends: 2511 [2022-01-10 08:01:26,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 08:01:26,339 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 31 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3042 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 08:01:26,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-01-10 08:01:26,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2509. [2022-01-10 08:01:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2507 states have (on average 1.540885520542481) internal successors, (3863), 2508 states have internal predecessors, (3863), 0 states have call successors, (0), 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 08:01:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3863 transitions. [2022-01-10 08:01:26,430 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3863 transitions. Word has length 64 [2022-01-10 08:01:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:26,430 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3863 transitions. [2022-01-10 08:01:26,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:01:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3863 transitions. [2022-01-10 08:01:26,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:26,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:26,436 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:26,459 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 08:01:26,643 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 08:01:26,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:26,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2129817016, now seen corresponding path program 1 times [2022-01-10 08:01:26,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:26,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641661739] [2022-01-10 08:01:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:26,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:26,645 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 08:01:26,659 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 08:01:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:26,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:01:26,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:27,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:01:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:27,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:27,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641661739] [2022-01-10 08:01:27,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641661739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:01:27,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:01:27,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:01:27,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332042173] [2022-01-10 08:01:27,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:01:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:01:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:27,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:01:27,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:01:27,829 INFO L87 Difference]: Start difference. First operand 2509 states and 3863 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 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 08:01:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:28,074 INFO L93 Difference]: Finished difference Result 3230 states and 4876 transitions. [2022-01-10 08:01:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 08:01:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 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 64 [2022-01-10 08:01:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:28,082 INFO L225 Difference]: With dead ends: 3230 [2022-01-10 08:01:28,082 INFO L226 Difference]: Without dead ends: 2556 [2022-01-10 08:01:28,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-10 08:01:28,083 INFO L933 BasicCegarLoop]: 1500 mSDtfsCounter, 5825 mSDsluCounter, 9148 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5825 SdHoareTripleChecker+Valid, 10648 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:28,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5825 Valid, 10648 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2022-01-10 08:01:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-01-10 08:01:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2519. [2022-01-10 08:01:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2517 states have (on average 1.5395311879221296) internal successors, (3875), 2518 states have internal predecessors, (3875), 0 states have call successors, (0), 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 08:01:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3875 transitions. [2022-01-10 08:01:28,127 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3875 transitions. Word has length 64 [2022-01-10 08:01:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:28,127 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 3875 transitions. [2022-01-10 08:01:28,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 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 08:01:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3875 transitions. [2022-01-10 08:01:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:28,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:28,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:28,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 08:01:28,334 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 08:01:28,334 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:28,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1514914168, now seen corresponding path program 1 times [2022-01-10 08:01:28,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:28,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307887746] [2022-01-10 08:01:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:28,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:28,337 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 08:01:28,338 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 08:01:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:28,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:28,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:28,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307887746] [2022-01-10 08:01:28,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307887746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:28,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:28,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:28,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696876285] [2022-01-10 08:01:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:28,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:28,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:28,537 INFO L87 Difference]: Start difference. First operand 2519 states and 3875 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:01:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:28,578 INFO L93 Difference]: Finished difference Result 2879 states and 4380 transitions. [2022-01-10 08:01:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2022-01-10 08:01:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:28,589 INFO L225 Difference]: With dead ends: 2879 [2022-01-10 08:01:28,589 INFO L226 Difference]: Without dead ends: 1921 [2022-01-10 08:01:28,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 08:01:28,591 INFO L933 BasicCegarLoop]: 1533 mSDtfsCounter, 25 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3033 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 08:01:28,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3033 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-01-10 08:01:28,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1913. [2022-01-10 08:01:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1911 states have (on average 1.5792778649921506) internal successors, (3018), 1912 states have internal predecessors, (3018), 0 states have call successors, (0), 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 08:01:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3018 transitions. [2022-01-10 08:01:28,657 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3018 transitions. Word has length 64 [2022-01-10 08:01:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:28,657 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 3018 transitions. [2022-01-10 08:01:28,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:01:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3018 transitions. [2022-01-10 08:01:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:28,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:28,660 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:28,668 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 08:01:28,868 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 08:01:28,869 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2009059564, now seen corresponding path program 1 times [2022-01-10 08:01:28,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:28,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872377888] [2022-01-10 08:01:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:28,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:28,872 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 08:01:28,873 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 08:01:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:01:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 08:01:29,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:29,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872377888] [2022-01-10 08:01:29,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872377888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:29,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:29,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:29,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199063425] [2022-01-10 08:01:29,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:29,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:01:29,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:01:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:01:29,174 INFO L87 Difference]: Start difference. First operand 1913 states and 3018 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 08:01:29,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:29,222 INFO L93 Difference]: Finished difference Result 2257 states and 3499 transitions. [2022-01-10 08:01:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:29,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 64 [2022-01-10 08:01:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:29,239 INFO L225 Difference]: With dead ends: 2257 [2022-01-10 08:01:29,239 INFO L226 Difference]: Without dead ends: 1913 [2022-01-10 08:01:29,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:01:29,240 INFO L933 BasicCegarLoop]: 1506 mSDtfsCounter, 2899 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2899 SdHoareTripleChecker+Valid, 4501 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:29,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2899 Valid, 4501 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-01-10 08:01:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-01-10 08:01:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1913. [2022-01-10 08:01:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1911 states have (on average 1.5787545787545787) internal successors, (3017), 1912 states have internal predecessors, (3017), 0 states have call successors, (0), 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 08:01:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3017 transitions. [2022-01-10 08:01:29,307 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3017 transitions. Word has length 64 [2022-01-10 08:01:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:29,307 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 3017 transitions. [2022-01-10 08:01:29,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 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 08:01:29,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3017 transitions. [2022-01-10 08:01:29,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:29,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:29,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:29,318 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 08:01:29,516 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 08:01:29,516 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:29,517 INFO L85 PathProgramCache]: Analyzing trace with hash 740302356, now seen corresponding path program 1 times [2022-01-10 08:01:29,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:29,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019967826] [2022-01-10 08:01:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:29,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:29,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:29,529 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 08:01:29,531 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 08:01:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:01:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 08:01:29,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:29,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:29,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019967826] [2022-01-10 08:01:29,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019967826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:29,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:29,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:29,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711624505] [2022-01-10 08:01:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:29,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:01:29,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:01:29,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:01:29,842 INFO L87 Difference]: Start difference. First operand 1913 states and 3017 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 08:01:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:29,904 INFO L93 Difference]: Finished difference Result 2261 states and 3503 transitions. [2022-01-10 08:01:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 64 [2022-01-10 08:01:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:29,906 INFO L225 Difference]: With dead ends: 2261 [2022-01-10 08:01:29,906 INFO L226 Difference]: Without dead ends: 1913 [2022-01-10 08:01:29,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:01:29,909 INFO L933 BasicCegarLoop]: 1509 mSDtfsCounter, 1457 mSDsluCounter, 3016 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 4525 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:29,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 4525 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2022-01-10 08:01:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-01-10 08:01:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1913. [2022-01-10 08:01:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1911 states have (on average 1.5782312925170068) internal successors, (3016), 1912 states have internal predecessors, (3016), 0 states have call successors, (0), 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 08:01:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3016 transitions. [2022-01-10 08:01:29,936 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3016 transitions. Word has length 64 [2022-01-10 08:01:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:29,936 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 3016 transitions. [2022-01-10 08:01:29,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 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 08:01:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3016 transitions. [2022-01-10 08:01:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-10 08:01:29,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:29,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:29,953 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 08:01:30,143 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 08:01:30,144 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -261059308, now seen corresponding path program 1 times [2022-01-10 08:01:30,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395491939] [2022-01-10 08:01:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:30,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:30,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:30,145 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 08:01:30,147 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 08:01:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:30,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:01:30,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 08:01:30,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:30,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:30,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395491939] [2022-01-10 08:01:30,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395491939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:30,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:30,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:30,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973168582] [2022-01-10 08:01:30,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:30,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:01:30,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:01:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:01:30,463 INFO L87 Difference]: Start difference. First operand 1913 states and 3016 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:30,516 INFO L93 Difference]: Finished difference Result 2251 states and 3491 transitions. [2022-01-10 08:01:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:01:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-01-10 08:01:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:30,518 INFO L225 Difference]: With dead ends: 2251 [2022-01-10 08:01:30,518 INFO L226 Difference]: Without dead ends: 1899 [2022-01-10 08:01:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:01:30,519 INFO L933 BasicCegarLoop]: 1512 mSDtfsCounter, 2905 mSDsluCounter, 3012 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2905 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:30,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2905 Valid, 4524 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 47 Unchecked, 0.0s Time] [2022-01-10 08:01:30,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-01-10 08:01:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1899. [2022-01-10 08:01:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1897 states have (on average 1.580917237743806) internal successors, (2999), 1898 states have internal predecessors, (2999), 0 states have call successors, (0), 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 08:01:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2999 transitions. [2022-01-10 08:01:30,540 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2999 transitions. Word has length 64 [2022-01-10 08:01:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:30,540 INFO L470 AbstractCegarLoop]: Abstraction has 1899 states and 2999 transitions. [2022-01-10 08:01:30,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2999 transitions. [2022-01-10 08:01:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:01:30,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:30,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:30,550 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 08:01:30,749 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 08:01:30,749 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:30,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash -805749704, now seen corresponding path program 1 times [2022-01-10 08:01:30,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:30,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686594909] [2022-01-10 08:01:30,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:30,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:30,751 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:01:30,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 08:01:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:30,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:01:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:30,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:30,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:30,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686594909] [2022-01-10 08:01:30,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686594909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:30,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:30,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:01:30,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658950340] [2022-01-10 08:01:30,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:30,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:01:30,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:01:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:30,941 INFO L87 Difference]: Start difference. First operand 1899 states and 2999 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:30,967 INFO L93 Difference]: Finished difference Result 2071 states and 3238 transitions. [2022-01-10 08:01:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:01:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 08:01:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:30,970 INFO L225 Difference]: With dead ends: 2071 [2022-01-10 08:01:30,971 INFO L226 Difference]: Without dead ends: 1733 [2022-01-10 08:01:30,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:01:30,972 INFO L933 BasicCegarLoop]: 1527 mSDtfsCounter, 22 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3015 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 08:01:30,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3015 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:01:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-01-10 08:01:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1731. [2022-01-10 08:01:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1729 states have (on average 1.59572006940428) internal successors, (2759), 1730 states have internal predecessors, (2759), 0 states have call successors, (0), 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 08:01:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2759 transitions. [2022-01-10 08:01:31,012 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2759 transitions. Word has length 65 [2022-01-10 08:01:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:31,012 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2759 transitions. [2022-01-10 08:01:31,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2759 transitions. [2022-01-10 08:01:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:01:31,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:31,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:31,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:01:31,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:01:31,220 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2023735102, now seen corresponding path program 1 times [2022-01-10 08:01:31,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:31,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659347233] [2022-01-10 08:01:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:31,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:31,222 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:01:31,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 08:01:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:01:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:32,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:01:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:01:32,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:32,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659347233] [2022-01-10 08:01:32,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659347233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:01:32,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:01:32,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 08:01:32,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640246859] [2022-01-10 08:01:32,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:01:32,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 08:01:32,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 08:01:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 08:01:32,444 INFO L87 Difference]: Start difference. First operand 1731 states and 2759 transitions. Second operand has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 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 08:01:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:32,586 INFO L93 Difference]: Finished difference Result 1913 states and 3012 transitions. [2022-01-10 08:01:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 08:01:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-01-10 08:01:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:32,590 INFO L225 Difference]: With dead ends: 1913 [2022-01-10 08:01:32,590 INFO L226 Difference]: Without dead ends: 1743 [2022-01-10 08:01:32,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-10 08:01:32,592 INFO L933 BasicCegarLoop]: 1501 mSDtfsCounter, 7311 mSDsluCounter, 10514 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7311 SdHoareTripleChecker+Valid, 12015 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:32,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7311 Valid, 12015 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-01-10 08:01:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-01-10 08:01:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1743. [2022-01-10 08:01:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1741 states have (on average 1.5939115450890293) internal successors, (2775), 1742 states have internal predecessors, (2775), 0 states have call successors, (0), 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 08:01:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2775 transitions. [2022-01-10 08:01:32,626 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2775 transitions. Word has length 65 [2022-01-10 08:01:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:32,626 INFO L470 AbstractCegarLoop]: Abstraction has 1743 states and 2775 transitions. [2022-01-10 08:01:32,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.6875) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 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 08:01:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2775 transitions. [2022-01-10 08:01:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:01:32,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:32,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:32,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 08:01:32,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:01:32,851 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:32,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash -94088951, now seen corresponding path program 1 times [2022-01-10 08:01:32,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:32,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602146117] [2022-01-10 08:01:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:32,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:32,879 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:01:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 08:01:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:32,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 08:01:33,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:33,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:33,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602146117] [2022-01-10 08:01:33,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602146117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:33,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:33,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:33,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570484435] [2022-01-10 08:01:33,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:33,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:33,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:33,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:33,333 INFO L87 Difference]: Start difference. First operand 1743 states and 2775 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:33,445 INFO L93 Difference]: Finished difference Result 1979 states and 3097 transitions. [2022-01-10 08:01:33,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:33,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 08:01:33,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:33,452 INFO L225 Difference]: With dead ends: 1979 [2022-01-10 08:01:33,452 INFO L226 Difference]: Without dead ends: 1809 [2022-01-10 08:01:33,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:33,453 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 3060 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3060 SdHoareTripleChecker+Valid, 3180 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:33,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3060 Valid, 3180 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-01-10 08:01:33,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1743. [2022-01-10 08:01:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1741 states have (on average 1.5904652498564045) internal successors, (2769), 1742 states have internal predecessors, (2769), 0 states have call successors, (0), 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 08:01:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2769 transitions. [2022-01-10 08:01:33,475 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2769 transitions. Word has length 66 [2022-01-10 08:01:33,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:33,475 INFO L470 AbstractCegarLoop]: Abstraction has 1743 states and 2769 transitions. [2022-01-10 08:01:33,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2769 transitions. [2022-01-10 08:01:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:01:33,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:33,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:33,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 08:01:33,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:01:33,683 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1408270156, now seen corresponding path program 1 times [2022-01-10 08:01:33,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183843232] [2022-01-10 08:01:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:33,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:33,685 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:01:33,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 08:01:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:33,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 08:01:34,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:34,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183843232] [2022-01-10 08:01:34,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183843232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:34,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:34,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:34,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236795223] [2022-01-10 08:01:34,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:34,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:34,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:34,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:34,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:34,010 INFO L87 Difference]: Start difference. First operand 1743 states and 2769 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:01:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:34,088 INFO L93 Difference]: Finished difference Result 1923 states and 3017 transitions. [2022-01-10 08:01:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:34,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 08:01:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:34,091 INFO L225 Difference]: With dead ends: 1923 [2022-01-10 08:01:34,091 INFO L226 Difference]: Without dead ends: 1865 [2022-01-10 08:01:34,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:34,093 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 1601 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 3220 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:34,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1601 Valid, 3220 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2022-01-10 08:01:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1803. [2022-01-10 08:01:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1801 states have (on average 1.580788450860633) internal successors, (2847), 1802 states have internal predecessors, (2847), 0 states have call successors, (0), 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 08:01:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2847 transitions. [2022-01-10 08:01:34,119 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2847 transitions. Word has length 66 [2022-01-10 08:01:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:34,119 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 2847 transitions. [2022-01-10 08:01:34,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 08:01:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2847 transitions. [2022-01-10 08:01:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:01:34,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:34,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:34,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 08:01:34,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:01:34,327 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:34,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash 52806377, now seen corresponding path program 1 times [2022-01-10 08:01:34,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:34,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292603091] [2022-01-10 08:01:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:34,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:34,329 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:01:34,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 08:01:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:01:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:01:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:01:34,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:01:34,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:01:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292603091] [2022-01-10 08:01:34,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292603091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:01:34,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:01:34,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:01:34,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98787036] [2022-01-10 08:01:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:01:34,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:01:34,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:01:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:01:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:34,703 INFO L87 Difference]: Start difference. First operand 1803 states and 2847 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:01:34,786 INFO L93 Difference]: Finished difference Result 1983 states and 3095 transitions. [2022-01-10 08:01:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:01:34,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-01-10 08:01:34,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:01:34,790 INFO L225 Difference]: With dead ends: 1983 [2022-01-10 08:01:34,790 INFO L226 Difference]: Without dead ends: 1925 [2022-01-10 08:01:34,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:01:34,791 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 1596 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 3221 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:01:34,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 3221 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:01:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2022-01-10 08:01:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1863. [2022-01-10 08:01:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1861 states have (on average 1.5717356260075228) internal successors, (2925), 1862 states have internal predecessors, (2925), 0 states have call successors, (0), 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 08:01:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2925 transitions. [2022-01-10 08:01:34,818 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2925 transitions. Word has length 66 [2022-01-10 08:01:34,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:01:34,819 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 2925 transitions. [2022-01-10 08:01:34,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:01:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2925 transitions. [2022-01-10 08:01:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:01:34,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:01:34,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:01:34,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 08:01:35,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:01:35,031 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:01:35,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:01:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2022-01-10 08:01:35,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:01:35,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107863744] [2022-01-10 08:01:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:01:35,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:01:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:01:35,033 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:01:35,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 08:01:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:01:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 08:01:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates...