/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/eca-rers2018/Problem10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 05:47:49,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 05:47:49,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 05:47:49,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 05:47:49,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 05:47:49,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 05:47:49,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 05:47:49,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 05:47:49,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 05:47:49,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 05:47:49,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 05:47:49,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 05:47:49,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 05:47:49,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 05:47:49,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 05:47:49,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 05:47:49,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 05:47:49,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 05:47:49,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 05:47:49,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 05:47:49,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 05:47:49,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 05:47:49,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 05:47:49,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 05:47:49,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 05:47:49,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 05:47:49,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 05:47:49,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 05:47:49,559 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 05:47:49,580 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 05:47:49,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 05:47:49,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 05:47:49,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 05:47:49,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 05:47:49,581 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 05:47:49,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 05:47:49,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 05:47:49,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 05:47:49,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 05:47:49,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:47:49,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 05:47:49,583 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 05:47:49,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 05:47:49,584 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 05:47:49,584 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 05:47:49,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 05:47:49,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 05:47:49,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 05:47:49,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 05:47:49,771 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 05:47:49,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2018/Problem10.c [2022-01-10 05:47:49,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8091f53ea/3eb105a0c5394ecd90fc50094b54651a/FLAG08eb78831 [2022-01-10 05:47:50,300 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 05:47:50,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem10.c [2022-01-10 05:47:50,319 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8091f53ea/3eb105a0c5394ecd90fc50094b54651a/FLAG08eb78831 [2022-01-10 05:47:50,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8091f53ea/3eb105a0c5394ecd90fc50094b54651a [2022-01-10 05:47:50,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 05:47:50,333 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 05:47:50,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 05:47:50,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 05:47:50,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 05:47:50,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278392f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50, skipping insertion in model container [2022-01-10 05:47:50,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 05:47:50,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 05:47:50,518 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem10.c[778,791] [2022-01-10 05:47:50,521 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem10.c[817,830] [2022-01-10 05:47:50,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:47:50,786 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 05:47:50,795 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem10.c[778,791] [2022-01-10 05:47:50,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2018/Problem10.c[817,830] [2022-01-10 05:47:50,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 05:47:50,880 INFO L208 MainTranslator]: Completed translation [2022-01-10 05:47:50,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50 WrapperNode [2022-01-10 05:47:50,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 05:47:50,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 05:47:50,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 05:47:50,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 05:47:50,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,968 INFO L137 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 864 [2022-01-10 05:47:50,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 05:47:50,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 05:47:50,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 05:47:50,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 05:47:50,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:50,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:51,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:51,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:51,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:51,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 05:47:51,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 05:47:51,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 05:47:51,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 05:47:51,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (1/1) ... [2022-01-10 05:47:51,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 05:47:51,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 05:47:51,075 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 05:47:51,089 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 05:47:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 05:47:51,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 05:47:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-01-10 05:47:51,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-01-10 05:47:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-01-10 05:47:51,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-01-10 05:47:51,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 05:47:51,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 05:47:51,205 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 05:47:51,206 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 05:47:52,010 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 05:47:52,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 05:47:52,023 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 05:47:52,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:47:52 BoogieIcfgContainer [2022-01-10 05:47:52,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 05:47:52,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 05:47:52,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 05:47:52,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 05:47:52,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 05:47:50" (1/3) ... [2022-01-10 05:47:52,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe47990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:47:52, skipping insertion in model container [2022-01-10 05:47:52,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 05:47:50" (2/3) ... [2022-01-10 05:47:52,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fe47990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 05:47:52, skipping insertion in model container [2022-01-10 05:47:52,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 05:47:52" (3/3) ... [2022-01-10 05:47:52,032 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10.c [2022-01-10 05:47:52,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 05:47:52,036 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 05:47:52,077 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 05:47:52,084 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 05:47:52,084 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 05:47:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-10 05:47:52,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-10 05:47:52,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:52,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:47:52,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:52,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:52,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1184212657, now seen corresponding path program 1 times [2022-01-10 05:47:52,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134900932] [2022-01-10 05:47:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:52,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:52,133 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 05:47:52,138 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 05:47:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:47:52,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:47:52,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:52,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134900932] [2022-01-10 05:47:52,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134900932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:52,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:52,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:47:52,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144634811] [2022-01-10 05:47:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:52,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:47:52,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:47:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:47:52,309 INFO L87 Difference]: Start difference. First operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:53,397 INFO L93 Difference]: Finished difference Result 1165 states and 2069 transitions. [2022-01-10 05:47:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:47:53,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-10 05:47:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:53,411 INFO L225 Difference]: With dead ends: 1165 [2022-01-10 05:47:53,411 INFO L226 Difference]: Without dead ends: 690 [2022-01-10 05:47:53,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:47:53,418 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 373 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:53,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 772 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 05:47:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-01-10 05:47:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 557. [2022-01-10 05:47:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 455 states have (on average 1.589010989010989) internal successors, (723), 554 states have internal predecessors, (723), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 823 transitions. [2022-01-10 05:47:53,501 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 823 transitions. Word has length 13 [2022-01-10 05:47:53,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:53,502 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 823 transitions. [2022-01-10 05:47:53,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 823 transitions. [2022-01-10 05:47:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 05:47:53,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:53,510 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] [2022-01-10 05:47:53,517 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 05:47:53,711 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 05:47:53,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash -249172658, now seen corresponding path program 1 times [2022-01-10 05:47:53,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:53,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820951393] [2022-01-10 05:47:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:53,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:53,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:53,715 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 05:47:53,716 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 05:47:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:47:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:53,815 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 05:47:53,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:53,815 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:53,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820951393] [2022-01-10 05:47:53,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820951393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:53,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:53,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:47:53,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105208563] [2022-01-10 05:47:53,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:53,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:47:53,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:47:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:47:53,818 INFO L87 Difference]: Start difference. First operand 557 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:54,573 INFO L93 Difference]: Finished difference Result 1704 states and 2582 transitions. [2022-01-10 05:47:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:47:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 05:47:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:54,578 INFO L225 Difference]: With dead ends: 1704 [2022-01-10 05:47:54,578 INFO L226 Difference]: Without dead ends: 1149 [2022-01-10 05:47:54,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:47:54,580 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 622 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:54,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 1150 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 05:47:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-01-10 05:47:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 888. [2022-01-10 05:47:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5521628498727735) internal successors, (1220), 885 states have internal predecessors, (1220), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1320 transitions. [2022-01-10 05:47:54,606 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1320 transitions. Word has length 21 [2022-01-10 05:47:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:54,607 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1320 transitions. [2022-01-10 05:47:54,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1320 transitions. [2022-01-10 05:47:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 05:47:54,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:54,608 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] [2022-01-10 05:47:54,618 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 05:47:54,816 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 05:47:54,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1086962958, now seen corresponding path program 1 times [2022-01-10 05:47:54,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:54,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659044248] [2022-01-10 05:47:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:54,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:54,819 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 05:47:54,820 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 05:47:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:54,908 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 05:47:54,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:54,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:54,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659044248] [2022-01-10 05:47:54,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659044248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:54,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:54,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:47:54,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701485727] [2022-01-10 05:47:54,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:54,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:54,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:54,910 INFO L87 Difference]: Start difference. First operand 888 states and 1320 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:55,363 INFO L93 Difference]: Finished difference Result 2208 states and 3348 transitions. [2022-01-10 05:47:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:55,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 05:47:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:55,368 INFO L225 Difference]: With dead ends: 2208 [2022-01-10 05:47:55,368 INFO L226 Difference]: Without dead ends: 1322 [2022-01-10 05:47:55,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 05:47:55,370 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 310 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:55,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 801 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 05:47:55,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-01-10 05:47:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 998. [2022-01-10 05:47:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 896 states have (on average 1.4397321428571428) internal successors, (1290), 995 states have internal predecessors, (1290), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1390 transitions. [2022-01-10 05:47:55,402 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1390 transitions. Word has length 24 [2022-01-10 05:47:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:55,402 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1390 transitions. [2022-01-10 05:47:55,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1390 transitions. [2022-01-10 05:47:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 05:47:55,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:55,405 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] [2022-01-10 05:47:55,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 05:47:55,628 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 05:47:55,628 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221522, now seen corresponding path program 1 times [2022-01-10 05:47:55,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716862561] [2022-01-10 05:47:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:55,629 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:55,632 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 05:47:55,634 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 05:47:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:55,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:55,725 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 05:47:55,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:55,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:55,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716862561] [2022-01-10 05:47:55,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716862561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:55,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:55,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:47:55,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737866645] [2022-01-10 05:47:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:55,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:55,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:55,741 INFO L87 Difference]: Start difference. First operand 998 states and 1390 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:55,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:55,861 INFO L93 Difference]: Finished difference Result 2885 states and 4035 transitions. [2022-01-10 05:47:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 05:47:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:55,867 INFO L225 Difference]: With dead ends: 2885 [2022-01-10 05:47:55,867 INFO L226 Difference]: Without dead ends: 1889 [2022-01-10 05:47:55,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 05:47:55,869 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 461 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:55,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1008 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:47:55,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-01-10 05:47:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1814. [2022-01-10 05:47:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1712 states have (on average 1.4158878504672898) internal successors, (2424), 1811 states have internal predecessors, (2424), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:55,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 2524 transitions. [2022-01-10 05:47:55,917 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 2524 transitions. Word has length 24 [2022-01-10 05:47:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:55,918 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 2524 transitions. [2022-01-10 05:47:55,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:55,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 2524 transitions. [2022-01-10 05:47:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 05:47:55,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:55,918 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 05:47:55,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 05:47:56,124 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 05:47:56,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:56,125 INFO L85 PathProgramCache]: Analyzing trace with hash -995255721, now seen corresponding path program 1 times [2022-01-10 05:47:56,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:56,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85722330] [2022-01-10 05:47:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:56,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:56,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:56,127 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 05:47:56,127 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 05:47:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:56,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:56,220 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 05:47:56,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:56,221 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85722330] [2022-01-10 05:47:56,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85722330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:56,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:56,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:47:56,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425945312] [2022-01-10 05:47:56,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:56,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:56,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:56,222 INFO L87 Difference]: Start difference. First operand 1814 states and 2524 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:56,272 INFO L93 Difference]: Finished difference Result 3604 states and 5006 transitions. [2022-01-10 05:47:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:56,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:47:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:56,282 INFO L225 Difference]: With dead ends: 3604 [2022-01-10 05:47:56,282 INFO L226 Difference]: Without dead ends: 3597 [2022-01-10 05:47:56,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 05:47:56,284 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 548 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:56,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1333 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:47:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2022-01-10 05:47:56,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 3496. [2022-01-10 05:47:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3496 states, 3394 states have (on average 1.4113140836770772) internal successors, (4790), 3493 states have internal predecessors, (4790), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:56,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3496 states to 3496 states and 4890 transitions. [2022-01-10 05:47:56,337 INFO L78 Accepts]: Start accepts. Automaton has 3496 states and 4890 transitions. Word has length 26 [2022-01-10 05:47:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:56,337 INFO L470 AbstractCegarLoop]: Abstraction has 3496 states and 4890 transitions. [2022-01-10 05:47:56,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3496 states and 4890 transitions. [2022-01-10 05:47:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 05:47:56,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:56,338 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 05:47:56,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 05:47:56,544 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 05:47:56,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1419566957, now seen corresponding path program 1 times [2022-01-10 05:47:56,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:56,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380457112] [2022-01-10 05:47:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:56,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:56,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:56,546 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 05:47:56,548 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 05:47:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:56,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:47:56,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:56,623 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:56,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380457112] [2022-01-10 05:47:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380457112] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:56,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:56,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:47:56,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126049668] [2022-01-10 05:47:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:56,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:56,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:56,624 INFO L87 Difference]: Start difference. First operand 3496 states and 4890 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:56,822 INFO L93 Difference]: Finished difference Result 8533 states and 11943 transitions. [2022-01-10 05:47:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:47:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:56,836 INFO L225 Difference]: With dead ends: 8533 [2022-01-10 05:47:56,836 INFO L226 Difference]: Without dead ends: 5039 [2022-01-10 05:47:56,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 05:47:56,843 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 434 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:56,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1234 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:47:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5039 states. [2022-01-10 05:47:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 4960. [2022-01-10 05:47:56,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4858 states have (on average 1.3944009880609305) internal successors, (6774), 4957 states have internal predecessors, (6774), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 6874 transitions. [2022-01-10 05:47:56,924 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 6874 transitions. Word has length 26 [2022-01-10 05:47:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:56,924 INFO L470 AbstractCegarLoop]: Abstraction has 4960 states and 6874 transitions. [2022-01-10 05:47:56,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 6874 transitions. [2022-01-10 05:47:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 05:47:56,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:56,925 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] [2022-01-10 05:47:56,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 05:47:57,132 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 05:47:57,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:57,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:57,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1047654979, now seen corresponding path program 1 times [2022-01-10 05:47:57,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:57,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965735004] [2022-01-10 05:47:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:57,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:57,134 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 05:47:57,136 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 05:47:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:57,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:57,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 05:47:57,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:57,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:57,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965735004] [2022-01-10 05:47:57,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965735004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:57,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:57,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:47:57,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424044672] [2022-01-10 05:47:57,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:57,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:57,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:57,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:57,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:57,213 INFO L87 Difference]: Start difference. First operand 4960 states and 6874 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:57,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:57,382 INFO L93 Difference]: Finished difference Result 12230 states and 17050 transitions. [2022-01-10 05:47:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:57,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 05:47:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:57,403 INFO L225 Difference]: With dead ends: 12230 [2022-01-10 05:47:57,404 INFO L226 Difference]: Without dead ends: 7272 [2022-01-10 05:47:57,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 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 05:47:57,413 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 471 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:57,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 1449 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:47:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7272 states. [2022-01-10 05:47:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7272 to 7164. [2022-01-10 05:47:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7164 states, 7062 states have (on average 1.3763806287170772) internal successors, (9720), 7161 states have internal predecessors, (9720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7164 states to 7164 states and 9820 transitions. [2022-01-10 05:47:57,568 INFO L78 Accepts]: Start accepts. Automaton has 7164 states and 9820 transitions. Word has length 27 [2022-01-10 05:47:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:57,568 INFO L470 AbstractCegarLoop]: Abstraction has 7164 states and 9820 transitions. [2022-01-10 05:47:57,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7164 states and 9820 transitions. [2022-01-10 05:47:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 05:47:57,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:57,570 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] [2022-01-10 05:47:57,576 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 05:47:57,777 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 05:47:57,777 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:57,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1314457887, now seen corresponding path program 1 times [2022-01-10 05:47:57,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:57,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135209069] [2022-01-10 05:47:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:57,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:57,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:57,780 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 05:47:57,781 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 05:47:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:57,888 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 05:47:57,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:57,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135209069] [2022-01-10 05:47:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135209069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:57,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:57,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:47:57,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538695241] [2022-01-10 05:47:57,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:57,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:57,892 INFO L87 Difference]: Start difference. First operand 7164 states and 9820 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:57,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:57,975 INFO L93 Difference]: Finished difference Result 17140 states and 23668 transitions. [2022-01-10 05:47:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:57,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 05:47:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:58,015 INFO L225 Difference]: With dead ends: 17140 [2022-01-10 05:47:58,015 INFO L226 Difference]: Without dead ends: 12102 [2022-01-10 05:47:58,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 05:47:58,027 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 530 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:58,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1116 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:47:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12102 states. [2022-01-10 05:47:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12102 to 12002. [2022-01-10 05:47:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12002 states, 11900 states have (on average 1.3811764705882352) internal successors, (16436), 11999 states have internal predecessors, (16436), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:58,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12002 states to 12002 states and 16536 transitions. [2022-01-10 05:47:58,231 INFO L78 Accepts]: Start accepts. Automaton has 12002 states and 16536 transitions. Word has length 28 [2022-01-10 05:47:58,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:58,231 INFO L470 AbstractCegarLoop]: Abstraction has 12002 states and 16536 transitions. [2022-01-10 05:47:58,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:58,232 INFO L276 IsEmpty]: Start isEmpty. Operand 12002 states and 16536 transitions. [2022-01-10 05:47:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 05:47:58,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:58,232 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 05:47:58,241 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 05:47:58,435 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 05:47:58,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 451574756, now seen corresponding path program 1 times [2022-01-10 05:47:58,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721354225] [2022-01-10 05:47:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:58,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:58,438 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 05:47:58,439 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 05:47:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:58,526 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 05:47:58,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:58,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:58,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721354225] [2022-01-10 05:47:58,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721354225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:58,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:58,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 05:47:58,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740132650] [2022-01-10 05:47:58,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:58,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:58,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:58,528 INFO L87 Difference]: Start difference. First operand 12002 states and 16536 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:47:58,812 INFO L93 Difference]: Finished difference Result 34911 states and 48093 transitions. [2022-01-10 05:47:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:47:58,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 05:47:58,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:47:58,853 INFO L225 Difference]: With dead ends: 34911 [2022-01-10 05:47:58,853 INFO L226 Difference]: Without dead ends: 22911 [2022-01-10 05:47:58,874 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 05:47:58,875 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 474 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:47:58,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 1093 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:47:58,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22911 states. [2022-01-10 05:47:59,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22911 to 22828. [2022-01-10 05:47:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22828 states, 22726 states have (on average 1.3602481738977383) internal successors, (30913), 22825 states have internal predecessors, (30913), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:59,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22828 states to 22828 states and 31013 transitions. [2022-01-10 05:47:59,265 INFO L78 Accepts]: Start accepts. Automaton has 22828 states and 31013 transitions. Word has length 30 [2022-01-10 05:47:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:47:59,265 INFO L470 AbstractCegarLoop]: Abstraction has 22828 states and 31013 transitions. [2022-01-10 05:47:59,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:47:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 22828 states and 31013 transitions. [2022-01-10 05:47:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 05:47:59,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:47:59,266 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] [2022-01-10 05:47:59,289 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 05:47:59,472 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 05:47:59,473 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:47:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:47:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash 354633128, now seen corresponding path program 1 times [2022-01-10 05:47:59,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:47:59,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97366741] [2022-01-10 05:47:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:47:59,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:47:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:47:59,475 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 05:47:59,476 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 05:47:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:47:59,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:47:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:47:59,609 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 05:47:59,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:47:59,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:47:59,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97366741] [2022-01-10 05:47:59,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97366741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:47:59,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:47:59,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:47:59,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791820263] [2022-01-10 05:47:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:47:59,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:47:59,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:47:59,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:47:59,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:47:59,611 INFO L87 Difference]: Start difference. First operand 22828 states and 31013 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:00,268 INFO L93 Difference]: Finished difference Result 53149 states and 73606 transitions. [2022-01-10 05:48:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-10 05:48:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:00,400 INFO L225 Difference]: With dead ends: 53149 [2022-01-10 05:48:00,400 INFO L226 Difference]: Without dead ends: 30323 [2022-01-10 05:48:00,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 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 05:48:00,433 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 222 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:00,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 722 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 05:48:00,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30323 states. [2022-01-10 05:48:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30323 to 29054. [2022-01-10 05:48:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29054 states, 28952 states have (on average 1.321083172147002) internal successors, (38248), 29051 states have internal predecessors, (38248), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29054 states to 29054 states and 38348 transitions. [2022-01-10 05:48:00,892 INFO L78 Accepts]: Start accepts. Automaton has 29054 states and 38348 transitions. Word has length 33 [2022-01-10 05:48:00,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:00,892 INFO L470 AbstractCegarLoop]: Abstraction has 29054 states and 38348 transitions. [2022-01-10 05:48:00,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:00,892 INFO L276 IsEmpty]: Start isEmpty. Operand 29054 states and 38348 transitions. [2022-01-10 05:48:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-10 05:48:00,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:00,893 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] [2022-01-10 05:48:00,899 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 05:48:01,099 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 05:48:01,099 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:01,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:01,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1594983404, now seen corresponding path program 1 times [2022-01-10 05:48:01,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:01,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857931539] [2022-01-10 05:48:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:01,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:01,101 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 05:48:01,102 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 05:48:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:01,216 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 05:48:01,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:01,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:01,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857931539] [2022-01-10 05:48:01,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857931539] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:01,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:01,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:01,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462271842] [2022-01-10 05:48:01,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:01,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:01,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:01,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:01,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:01,219 INFO L87 Difference]: Start difference. First operand 29054 states and 38348 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:01,546 INFO L93 Difference]: Finished difference Result 84557 states and 111719 transitions. [2022-01-10 05:48:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-10 05:48:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:01,686 INFO L225 Difference]: With dead ends: 84557 [2022-01-10 05:48:01,686 INFO L226 Difference]: Without dead ends: 55505 [2022-01-10 05:48:01,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 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 05:48:01,818 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 508 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:01,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 1363 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:01,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55505 states. [2022-01-10 05:48:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55505 to 55299. [2022-01-10 05:48:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55299 states, 55197 states have (on average 1.3124626338387957) internal successors, (72444), 55296 states have internal predecessors, (72444), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:02,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55299 states to 55299 states and 72544 transitions. [2022-01-10 05:48:02,493 INFO L78 Accepts]: Start accepts. Automaton has 55299 states and 72544 transitions. Word has length 33 [2022-01-10 05:48:02,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:02,493 INFO L470 AbstractCegarLoop]: Abstraction has 55299 states and 72544 transitions. [2022-01-10 05:48:02,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:02,493 INFO L276 IsEmpty]: Start isEmpty. Operand 55299 states and 72544 transitions. [2022-01-10 05:48:02,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 05:48:02,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:02,494 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] [2022-01-10 05:48:02,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-01-10 05:48:02,699 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 05:48:02,700 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash 276354924, now seen corresponding path program 1 times [2022-01-10 05:48:02,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:02,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97885941] [2022-01-10 05:48:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:02,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:02,702 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 05:48:02,702 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 05:48:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:02,799 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 05:48:02,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:02,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:02,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97885941] [2022-01-10 05:48:02,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97885941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:02,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:02,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:02,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789410332] [2022-01-10 05:48:02,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:02,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:02,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:02,801 INFO L87 Difference]: Start difference. First operand 55299 states and 72544 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:03,789 INFO L93 Difference]: Finished difference Result 124576 states and 166588 transitions. [2022-01-10 05:48:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:03,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-01-10 05:48:03,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:03,949 INFO L225 Difference]: With dead ends: 124576 [2022-01-10 05:48:03,950 INFO L226 Difference]: Without dead ends: 69279 [2022-01-10 05:48:03,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 34 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 05:48:03,986 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 178 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:03,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 792 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 05:48:04,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69279 states. [2022-01-10 05:48:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69279 to 69156. [2022-01-10 05:48:04,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69156 states, 69054 states have (on average 1.2620268195904654) internal successors, (87148), 69153 states have internal predecessors, (87148), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69156 states to 69156 states and 87248 transitions. [2022-01-10 05:48:04,862 INFO L78 Accepts]: Start accepts. Automaton has 69156 states and 87248 transitions. Word has length 36 [2022-01-10 05:48:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:04,863 INFO L470 AbstractCegarLoop]: Abstraction has 69156 states and 87248 transitions. [2022-01-10 05:48:04,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 69156 states and 87248 transitions. [2022-01-10 05:48:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 05:48:04,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:04,864 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] [2022-01-10 05:48:04,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 05:48:05,070 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 05:48:05,071 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -209128006, now seen corresponding path program 1 times [2022-01-10 05:48:05,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:05,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820969153] [2022-01-10 05:48:05,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:05,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:05,073 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 05:48:05,077 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 05:48:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:05,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:05,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:05,168 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 05:48:05,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:05,168 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:05,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820969153] [2022-01-10 05:48:05,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820969153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:05,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:05,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:05,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759573940] [2022-01-10 05:48:05,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:05,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:05,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:05,169 INFO L87 Difference]: Start difference. First operand 69156 states and 87248 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:05,844 INFO L93 Difference]: Finished difference Result 160365 states and 202537 transitions. [2022-01-10 05:48:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 05:48:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:06,186 INFO L225 Difference]: With dead ends: 160365 [2022-01-10 05:48:06,186 INFO L226 Difference]: Without dead ends: 101250 [2022-01-10 05:48:06,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 38 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 05:48:06,216 INFO L933 BasicCegarLoop]: 984 mSDtfsCounter, 442 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:06,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1449 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 05:48:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101250 states. [2022-01-10 05:48:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101250 to 100931. [2022-01-10 05:48:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100931 states, 100829 states have (on average 1.2285255234109234) internal successors, (123871), 100928 states have internal predecessors, (123871), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:07,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100931 states to 100931 states and 123971 transitions. [2022-01-10 05:48:07,565 INFO L78 Accepts]: Start accepts. Automaton has 100931 states and 123971 transitions. Word has length 40 [2022-01-10 05:48:07,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:07,566 INFO L470 AbstractCegarLoop]: Abstraction has 100931 states and 123971 transitions. [2022-01-10 05:48:07,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand 100931 states and 123971 transitions. [2022-01-10 05:48:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 05:48:07,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:07,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:07,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 05:48:07,772 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 05:48:07,772 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:07,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1240470838, now seen corresponding path program 1 times [2022-01-10 05:48:07,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:07,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469462618] [2022-01-10 05:48:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:07,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:07,774 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 05:48:07,775 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 05:48:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:08,040 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 05:48:08,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:08,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:08,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469462618] [2022-01-10 05:48:08,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469462618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:08,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:08,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:08,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788479371] [2022-01-10 05:48:08,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:08,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:08,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:08,041 INFO L87 Difference]: Start difference. First operand 100931 states and 123971 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:09,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:09,048 INFO L93 Difference]: Finished difference Result 299508 states and 367960 transitions. [2022-01-10 05:48:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:09,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-01-10 05:48:09,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:09,368 INFO L225 Difference]: With dead ends: 299508 [2022-01-10 05:48:09,369 INFO L226 Difference]: Without dead ends: 198579 [2022-01-10 05:48:09,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 05:48:09,411 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 521 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:09,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1547 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:09,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198579 states. [2022-01-10 05:48:11,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198579 to 198361. [2022-01-10 05:48:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198361 states, 198259 states have (on average 1.2276668398408144) internal successors, (243396), 198358 states have internal predecessors, (243396), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198361 states to 198361 states and 243496 transitions. [2022-01-10 05:48:12,009 INFO L78 Accepts]: Start accepts. Automaton has 198361 states and 243496 transitions. Word has length 45 [2022-01-10 05:48:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:12,009 INFO L470 AbstractCegarLoop]: Abstraction has 198361 states and 243496 transitions. [2022-01-10 05:48:12,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 198361 states and 243496 transitions. [2022-01-10 05:48:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 05:48:12,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:12,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 05:48:12,016 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 05:48:12,213 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 05:48:12,214 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1976305641, now seen corresponding path program 1 times [2022-01-10 05:48:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363931523] [2022-01-10 05:48:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:12,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:12,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:12,216 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 05:48:12,217 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 05:48:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 05:48:12,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:12,344 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 05:48:12,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:12,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:12,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363931523] [2022-01-10 05:48:12,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363931523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:12,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:12,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:12,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696593226] [2022-01-10 05:48:12,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:12,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 05:48:12,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 05:48:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:48:12,346 INFO L87 Difference]: Start difference. First operand 198361 states and 243496 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:14,644 INFO L93 Difference]: Finished difference Result 526625 states and 643346 transitions. [2022-01-10 05:48:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 05:48:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-01-10 05:48:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:15,203 INFO L225 Difference]: With dead ends: 526625 [2022-01-10 05:48:15,204 INFO L226 Difference]: Without dead ends: 328266 [2022-01-10 05:48:15,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 05:48:15,508 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 819 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:15,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 731 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 05:48:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328266 states. [2022-01-10 05:48:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328266 to 198356. [2022-01-10 05:48:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198356 states, 198259 states have (on average 1.2163735315925128) internal successors, (241157), 198353 states have internal predecessors, (241157), 95 states have call successors, (95), 2 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198356 states to 198356 states and 241252 transitions. [2022-01-10 05:48:18,854 INFO L78 Accepts]: Start accepts. Automaton has 198356 states and 241252 transitions. Word has length 48 [2022-01-10 05:48:18,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:18,855 INFO L470 AbstractCegarLoop]: Abstraction has 198356 states and 241252 transitions. [2022-01-10 05:48:18,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 198356 states and 241252 transitions. [2022-01-10 05:48:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 05:48:18,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:18,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:48:18,864 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 05:48:19,056 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 05:48:19,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1754865588, now seen corresponding path program 1 times [2022-01-10 05:48:19,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456649088] [2022-01-10 05:48:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:19,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:19,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:19,059 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 05:48:19,061 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 05:48:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:19,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:19,286 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 05:48:19,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:19,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:19,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456649088] [2022-01-10 05:48:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456649088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:19,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:19,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:19,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119597655] [2022-01-10 05:48:19,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:19,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:19,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:19,288 INFO L87 Difference]: Start difference. First operand 198356 states and 241252 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:21,095 INFO L93 Difference]: Finished difference Result 580699 states and 705387 transitions. [2022-01-10 05:48:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2022-01-10 05:48:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:21,938 INFO L225 Difference]: With dead ends: 580699 [2022-01-10 05:48:21,938 INFO L226 Difference]: Without dead ends: 382345 [2022-01-10 05:48:21,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 05:48:21,999 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 441 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:21,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1402 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 05:48:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382345 states. [2022-01-10 05:48:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382345 to 382134. [2022-01-10 05:48:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382134 states, 382037 states have (on average 1.20846148409709) internal successors, (461677), 382131 states have internal predecessors, (461677), 95 states have call successors, (95), 2 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382134 states to 382134 states and 461772 transitions. [2022-01-10 05:48:27,028 INFO L78 Accepts]: Start accepts. Automaton has 382134 states and 461772 transitions. Word has length 113 [2022-01-10 05:48:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:27,028 INFO L470 AbstractCegarLoop]: Abstraction has 382134 states and 461772 transitions. [2022-01-10 05:48:27,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 382134 states and 461772 transitions. [2022-01-10 05:48:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 05:48:27,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:27,029 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:48:27,035 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 05:48:27,235 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 05:48:27,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:27,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:27,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2128909688, now seen corresponding path program 1 times [2022-01-10 05:48:27,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657480530] [2022-01-10 05:48:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:27,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:27,237 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 05:48:27,238 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 05:48:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 05:48:27,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:27,437 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657480530] [2022-01-10 05:48:27,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657480530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:27,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:27,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308557224] [2022-01-10 05:48:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:27,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:27,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:27,438 INFO L87 Difference]: Start difference. First operand 382134 states and 461772 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:30,585 INFO L93 Difference]: Finished difference Result 921715 states and 1114732 transitions. [2022-01-10 05:48:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2022-01-10 05:48:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:32,072 INFO L225 Difference]: With dead ends: 921715 [2022-01-10 05:48:32,073 INFO L226 Difference]: Without dead ends: 539583 [2022-01-10 05:48:32,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 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 05:48:32,219 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 451 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:32,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 1409 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539583 states. [2022-01-10 05:48:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539583 to 539398. [2022-01-10 05:48:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539398 states, 539301 states have (on average 1.1985051019745931) internal successors, (646355), 539395 states have internal predecessors, (646355), 95 states have call successors, (95), 2 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539398 states to 539398 states and 646450 transitions. [2022-01-10 05:48:39,562 INFO L78 Accepts]: Start accepts. Automaton has 539398 states and 646450 transitions. Word has length 145 [2022-01-10 05:48:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 05:48:39,562 INFO L470 AbstractCegarLoop]: Abstraction has 539398 states and 646450 transitions. [2022-01-10 05:48:39,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 539398 states and 646450 transitions. [2022-01-10 05:48:39,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 05:48:39,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 05:48:39,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:48:39,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 05:48:39,770 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 05:48:39,770 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 05:48:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 05:48:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1481921809, now seen corresponding path program 1 times [2022-01-10 05:48:39,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 05:48:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [981369009] [2022-01-10 05:48:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 05:48:39,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 05:48:39,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 05:48:39,773 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 05:48:39,774 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 05:48:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 05:48:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 05:48:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 05:48:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 05:48:39,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 05:48:39,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 05:48:39,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [981369009] [2022-01-10 05:48:39,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [981369009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 05:48:39,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 05:48:39,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 05:48:39,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033579000] [2022-01-10 05:48:39,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 05:48:39,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 05:48:39,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 05:48:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 05:48:39,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 05:48:39,976 INFO L87 Difference]: Start difference. First operand 539398 states and 646450 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 05:48:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 05:48:44,283 INFO L93 Difference]: Finished difference Result 1248515 states and 1501702 transitions. [2022-01-10 05:48:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 05:48:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-01-10 05:48:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 05:48:45,584 INFO L225 Difference]: With dead ends: 1248515 [2022-01-10 05:48:45,584 INFO L226 Difference]: Without dead ends: 709119 [2022-01-10 05:48:45,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 144 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 05:48:45,799 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 461 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 05:48:45,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1420 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 05:48:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709119 states.