/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:14:23,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:14:23,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:14:23,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:14:23,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:14:23,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:14:23,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:14:23,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:14:23,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:14:23,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:14:23,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:14:23,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:14:23,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:14:23,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:14:23,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:14:23,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:14:23,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:14:23,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:14:23,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:14:23,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:14:23,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:14:23,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:14:23,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:14:23,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:14:23,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 07:14:23,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 07:14:23,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 07:14:23,507 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 07:14:23,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 07:14:23,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 07:14:23,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 07:14:23,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 07:14:23,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 07:14:23,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 07:14:23,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 07:14:23,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 07:14:23,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 07:14:23,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 07:14:23,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:14:23,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:14:23,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:14:23,514 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 07:14:23,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:14:23,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:14:23,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:14:23,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:14:23,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:14:23,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:14:23,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:14:23,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:14:23,538 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:14:23,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:14:23,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:14:23,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:14:23,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:14:23,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:14:23,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:14:23,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:14:23,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:14:23,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:14:23,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:14:23,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:14:23,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:14:23,717 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:14:23,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-01-10 07:14:23,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3790d0c9/ffe39b3b9b3a40ee9b31507f7fc6748b/FLAG518a84285 [2022-01-10 07:14:24,140 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:14:24,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-01-10 07:14:24,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3790d0c9/ffe39b3b9b3a40ee9b31507f7fc6748b/FLAG518a84285 [2022-01-10 07:14:24,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3790d0c9/ffe39b3b9b3a40ee9b31507f7fc6748b [2022-01-10 07:14:24,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:14:24,159 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:14:24,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:14:24,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:14:24,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:14:24,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fc9c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24, skipping insertion in model container [2022-01-10 07:14:24,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:14:24,202 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:14:24,400 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4902,4915] [2022-01-10 07:14:24,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:14:24,436 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:14:24,467 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[4902,4915] [2022-01-10 07:14:24,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:14:24,502 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:14:24,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24 WrapperNode [2022-01-10 07:14:24,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:14:24,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:14:24,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:14:24,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:14:24,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,557 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 330 [2022-01-10 07:14:24,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:14:24,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:14:24,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:14:24,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:14:24,563 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:14:24,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:14:24,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:14:24,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:14:24,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (1/1) ... [2022-01-10 07:14:24,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:14:24,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:14:24,626 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 07:14:24,647 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 07:14:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:14:24,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:14:24,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:14:24,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:14:24,775 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:14:24,776 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:14:25,092 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:14:25,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:14:25,098 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 07:14:25,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:14:25 BoogieIcfgContainer [2022-01-10 07:14:25,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:14:25,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:14:25,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:14:25,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:14:25,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:14:24" (1/3) ... [2022-01-10 07:14:25,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dc7d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:14:25, skipping insertion in model container [2022-01-10 07:14:25,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:14:24" (2/3) ... [2022-01-10 07:14:25,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dc7d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:14:25, skipping insertion in model container [2022-01-10 07:14:25,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:14:25" (3/3) ... [2022-01-10 07:14:25,104 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-01-10 07:14:25,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:14:25,108 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 07:14:25,139 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:14:25,143 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 07:14:25,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 07:14:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 78 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 07:14:25,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:25,164 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] [2022-01-10 07:14:25,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:25,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash -347547403, now seen corresponding path program 1 times [2022-01-10 07:14:25,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905377894] [2022-01-10 07:14:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:25,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:25,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:25,182 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 07:14:25,183 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 07:14:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:25,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:25,413 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 07:14:25,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:25,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:25,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905377894] [2022-01-10 07:14:25,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905377894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:25,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:25,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:25,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136822665] [2022-01-10 07:14:25,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:25,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:25,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:25,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:25,437 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.7272727272727273) internal successors, (133), 78 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:25,476 INFO L93 Difference]: Finished difference Result 177 states and 286 transitions. [2022-01-10 07:14:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-01-10 07:14:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:25,488 INFO L225 Difference]: With dead ends: 177 [2022-01-10 07:14:25,488 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 07:14:25,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 07:14:25,494 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 91 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:25,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 277 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 07:14:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-01-10 07:14:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 115 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 169 transitions. [2022-01-10 07:14:25,542 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 169 transitions. Word has length 47 [2022-01-10 07:14:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:25,542 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 169 transitions. [2022-01-10 07:14:25,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 169 transitions. [2022-01-10 07:14:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 07:14:25,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:25,543 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 07:14:25,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:25,747 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 07:14:25,748 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:25,748 INFO L85 PathProgramCache]: Analyzing trace with hash -391185874, now seen corresponding path program 1 times [2022-01-10 07:14:25,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:25,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529365676] [2022-01-10 07:14:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:25,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:25,750 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 07:14:25,752 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 07:14:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:25,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:25,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:26,177 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 07:14:26,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:26,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:26,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529365676] [2022-01-10 07:14:26,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529365676] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:26,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:26,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:26,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147312446] [2022-01-10 07:14:26,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:26,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:26,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:26,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:26,186 INFO L87 Difference]: Start difference. First operand 116 states and 169 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:26,268 INFO L93 Difference]: Finished difference Result 209 states and 316 transitions. [2022-01-10 07:14:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:26,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-01-10 07:14:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:26,274 INFO L225 Difference]: With dead ends: 209 [2022-01-10 07:14:26,274 INFO L226 Difference]: Without dead ends: 119 [2022-01-10 07:14:26,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:26,276 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 22 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:26,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 237 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2022-01-10 07:14:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-10 07:14:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-01-10 07:14:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.4576271186440677) internal successors, (172), 118 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2022-01-10 07:14:26,289 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 48 [2022-01-10 07:14:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:26,290 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2022-01-10 07:14:26,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2022-01-10 07:14:26,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 07:14:26,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:26,291 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 07:14:26,317 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 07:14:26,498 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 07:14:26,498 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash 582777235, now seen corresponding path program 1 times [2022-01-10 07:14:26,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:26,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828705194] [2022-01-10 07:14:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:26,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:26,501 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 07:14:26,502 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 07:14:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:26,686 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 07:14:26,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:26,686 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828705194] [2022-01-10 07:14:26,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828705194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:26,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:26,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:26,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617181418] [2022-01-10 07:14:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:26,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:26,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:26,688 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:26,708 INFO L93 Difference]: Finished difference Result 283 states and 432 transitions. [2022-01-10 07:14:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-01-10 07:14:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:26,709 INFO L225 Difference]: With dead ends: 283 [2022-01-10 07:14:26,710 INFO L226 Difference]: Without dead ends: 193 [2022-01-10 07:14:26,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 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 07:14:26,712 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 64 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:26,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 238 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-10 07:14:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2022-01-10 07:14:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5052631578947369) internal successors, (286), 190 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 286 transitions. [2022-01-10 07:14:26,739 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 286 transitions. Word has length 48 [2022-01-10 07:14:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:26,740 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 286 transitions. [2022-01-10 07:14:26,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 286 transitions. [2022-01-10 07:14:26,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 07:14:26,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:26,741 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] [2022-01-10 07:14:26,749 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 07:14:26,943 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 07:14:26,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:26,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1919644817, now seen corresponding path program 1 times [2022-01-10 07:14:26,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:26,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968047898] [2022-01-10 07:14:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:26,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:26,946 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 07:14:26,948 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 07:14:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:27,279 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 07:14:27,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:27,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968047898] [2022-01-10 07:14:27,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968047898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:27,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:27,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:27,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340888818] [2022-01-10 07:14:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:27,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:27,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:27,281 INFO L87 Difference]: Start difference. First operand 191 states and 286 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:27,321 INFO L93 Difference]: Finished difference Result 358 states and 550 transitions. [2022-01-10 07:14:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:27,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-10 07:14:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:27,322 INFO L225 Difference]: With dead ends: 358 [2022-01-10 07:14:27,322 INFO L226 Difference]: Without dead ends: 196 [2022-01-10 07:14:27,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:27,323 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 30 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:27,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-01-10 07:14:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-10 07:14:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-01-10 07:14:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.4974358974358974) internal successors, (292), 195 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 292 transitions. [2022-01-10 07:14:27,329 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 292 transitions. Word has length 49 [2022-01-10 07:14:27,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:27,329 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 292 transitions. [2022-01-10 07:14:27,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 292 transitions. [2022-01-10 07:14:27,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-10 07:14:27,330 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:27,330 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] [2022-01-10 07:14:27,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 07:14:27,537 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 07:14:27,537 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1054112428, now seen corresponding path program 1 times [2022-01-10 07:14:27,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111751624] [2022-01-10 07:14:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:27,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:27,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:27,539 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 07:14:27,541 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 07:14:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:27,656 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 07:14:27,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:27,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:27,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111751624] [2022-01-10 07:14:27,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111751624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:27,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:27,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:27,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735098984] [2022-01-10 07:14:27,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:27,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:27,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:27,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:27,658 INFO L87 Difference]: Start difference. First operand 196 states and 292 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:27,673 INFO L93 Difference]: Finished difference Result 488 states and 754 transitions. [2022-01-10 07:14:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-10 07:14:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:27,675 INFO L225 Difference]: With dead ends: 488 [2022-01-10 07:14:27,675 INFO L226 Difference]: Without dead ends: 326 [2022-01-10 07:14:27,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 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 07:14:27,677 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 59 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:27,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 234 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:27,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-10 07:14:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 324. [2022-01-10 07:14:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.5232198142414861) internal successors, (492), 323 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 492 transitions. [2022-01-10 07:14:27,689 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 492 transitions. Word has length 49 [2022-01-10 07:14:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:27,690 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 492 transitions. [2022-01-10 07:14:27,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 492 transitions. [2022-01-10 07:14:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 07:14:27,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:27,694 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] [2022-01-10 07:14:27,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:27,900 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 07:14:27,901 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:27,901 INFO L85 PathProgramCache]: Analyzing trace with hash 322066169, now seen corresponding path program 1 times [2022-01-10 07:14:27,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:27,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389444195] [2022-01-10 07:14:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:27,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:27,902 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 07:14:27,903 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 07:14:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:27,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:28,204 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 07:14:28,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:28,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:28,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389444195] [2022-01-10 07:14:28,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389444195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:28,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:28,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:28,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875054912] [2022-01-10 07:14:28,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:28,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:28,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:28,206 INFO L87 Difference]: Start difference. First operand 324 states and 492 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:28,252 INFO L93 Difference]: Finished difference Result 619 states and 956 transitions. [2022-01-10 07:14:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:28,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-10 07:14:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:28,253 INFO L225 Difference]: With dead ends: 619 [2022-01-10 07:14:28,253 INFO L226 Difference]: Without dead ends: 329 [2022-01-10 07:14:28,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:28,254 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 16 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:28,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 247 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-01-10 07:14:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-10 07:14:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2022-01-10 07:14:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.5182926829268293) internal successors, (498), 328 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 498 transitions. [2022-01-10 07:14:28,275 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 498 transitions. Word has length 50 [2022-01-10 07:14:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:28,276 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 498 transitions. [2022-01-10 07:14:28,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,276 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 498 transitions. [2022-01-10 07:14:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-10 07:14:28,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:28,276 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] [2022-01-10 07:14:28,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:28,483 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 07:14:28,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1093929822, now seen corresponding path program 1 times [2022-01-10 07:14:28,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:28,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276829740] [2022-01-10 07:14:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:28,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:28,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:28,485 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 07:14:28,486 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 07:14:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:28,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:28,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:28,615 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 07:14:28,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:28,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276829740] [2022-01-10 07:14:28,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276829740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:28,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:28,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:28,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56809401] [2022-01-10 07:14:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:28,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:28,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:28,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:28,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:28,616 INFO L87 Difference]: Start difference. First operand 329 states and 498 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:28,633 INFO L93 Difference]: Finished difference Result 845 states and 1308 transitions. [2022-01-10 07:14:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-10 07:14:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:28,635 INFO L225 Difference]: With dead ends: 845 [2022-01-10 07:14:28,636 INFO L226 Difference]: Without dead ends: 555 [2022-01-10 07:14:28,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 07:14:28,636 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 54 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:28,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 230 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-01-10 07:14:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 553. [2022-01-10 07:14:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.5253623188405796) internal successors, (842), 552 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 842 transitions. [2022-01-10 07:14:28,650 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 842 transitions. Word has length 50 [2022-01-10 07:14:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:28,650 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 842 transitions. [2022-01-10 07:14:28,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:28,650 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 842 transitions. [2022-01-10 07:14:28,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-10 07:14:28,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:28,651 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] [2022-01-10 07:14:28,659 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 07:14:28,857 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 07:14:28,858 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash -562107061, now seen corresponding path program 1 times [2022-01-10 07:14:28,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:28,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861637115] [2022-01-10 07:14:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:28,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:28,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:28,860 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 07:14:28,860 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 07:14:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:28,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:28,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:29,282 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 07:14:29,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:29,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861637115] [2022-01-10 07:14:29,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861637115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:29,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:29,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:29,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931021942] [2022-01-10 07:14:29,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:29,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:29,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:29,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:29,284 INFO L87 Difference]: Start difference. First operand 553 states and 842 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:29,399 INFO L93 Difference]: Finished difference Result 3123 states and 4847 transitions. [2022-01-10 07:14:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-01-10 07:14:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:29,406 INFO L225 Difference]: With dead ends: 3123 [2022-01-10 07:14:29,406 INFO L226 Difference]: Without dead ends: 2609 [2022-01-10 07:14:29,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:29,408 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 469 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:29,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 480 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2022-01-10 07:14:29,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1577. [2022-01-10 07:14:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 1.5190355329949239) internal successors, (2394), 1576 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2394 transitions. [2022-01-10 07:14:29,469 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2394 transitions. Word has length 51 [2022-01-10 07:14:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:29,470 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 2394 transitions. [2022-01-10 07:14:29,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2394 transitions. [2022-01-10 07:14:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 07:14:29,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:29,471 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] [2022-01-10 07:14:29,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-01-10 07:14:29,680 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 07:14:29,680 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 59171559, now seen corresponding path program 1 times [2022-01-10 07:14:29,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1056320731] [2022-01-10 07:14:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:29,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:29,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:29,682 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 07:14:29,683 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 07:14:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:29,825 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 07:14:29,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:29,826 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:29,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1056320731] [2022-01-10 07:14:29,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1056320731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:29,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:29,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:29,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525518783] [2022-01-10 07:14:29,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:29,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:29,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:29,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:29,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:29,827 INFO L87 Difference]: Start difference. First operand 1577 states and 2394 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:29,886 INFO L93 Difference]: Finished difference Result 3853 states and 5868 transitions. [2022-01-10 07:14:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:29,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-10 07:14:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:29,893 INFO L225 Difference]: With dead ends: 3853 [2022-01-10 07:14:29,893 INFO L226 Difference]: Without dead ends: 2315 [2022-01-10 07:14:29,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 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 07:14:29,895 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 45 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:29,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 202 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-01-10 07:14:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-01-10 07:14:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 1.5025951557093427) internal successors, (3474), 2312 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3474 transitions. [2022-01-10 07:14:29,984 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3474 transitions. Word has length 53 [2022-01-10 07:14:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:29,984 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3474 transitions. [2022-01-10 07:14:29,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3474 transitions. [2022-01-10 07:14:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 07:14:29,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:29,985 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] [2022-01-10 07:14:29,993 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 07:14:30,191 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 07:14:30,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1811476054, now seen corresponding path program 1 times [2022-01-10 07:14:30,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:30,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921302792] [2022-01-10 07:14:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:30,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:30,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:30,193 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 07:14:30,196 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 07:14:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:14:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:30,315 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 07:14:30,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:30,316 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921302792] [2022-01-10 07:14:30,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921302792] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:30,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:30,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:30,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294949898] [2022-01-10 07:14:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:30,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:14:30,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:14:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:14:30,317 INFO L87 Difference]: Start difference. First operand 2313 states and 3474 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:30,438 INFO L93 Difference]: Finished difference Result 4275 states and 6385 transitions. [2022-01-10 07:14:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:14:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-01-10 07:14:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:30,450 INFO L225 Difference]: With dead ends: 4275 [2022-01-10 07:14:30,450 INFO L226 Difference]: Without dead ends: 4273 [2022-01-10 07:14:30,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:30,451 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 142 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:30,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 341 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:30,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2022-01-10 07:14:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 2425. [2022-01-10 07:14:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.476072607260726) internal successors, (3578), 2424 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 3578 transitions. [2022-01-10 07:14:30,575 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 3578 transitions. Word has length 54 [2022-01-10 07:14:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:30,576 INFO L470 AbstractCegarLoop]: Abstraction has 2425 states and 3578 transitions. [2022-01-10 07:14:30,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:30,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 3578 transitions. [2022-01-10 07:14:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 07:14:30,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:30,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:30,587 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 07:14:30,783 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 07:14:30,784 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:30,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1690284398, now seen corresponding path program 1 times [2022-01-10 07:14:30,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:30,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421294456] [2022-01-10 07:14:30,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:30,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:30,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:30,786 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 07:14:30,787 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 07:14:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:30,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:30,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:31,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:31,816 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:31,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421294456] [2022-01-10 07:14:31,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421294456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:31,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:31,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:31,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46075141] [2022-01-10 07:14:31,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:31,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:31,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:31,818 INFO L87 Difference]: Start difference. First operand 2425 states and 3578 transitions. Second operand has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:32,019 INFO L93 Difference]: Finished difference Result 4169 states and 6155 transitions. [2022-01-10 07:14:32,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:32,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 07:14:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:32,026 INFO L225 Difference]: With dead ends: 4169 [2022-01-10 07:14:32,026 INFO L226 Difference]: Without dead ends: 2535 [2022-01-10 07:14:32,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:32,028 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 116 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:32,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 741 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 212 Unchecked, 0.1s Time] [2022-01-10 07:14:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2022-01-10 07:14:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2452. [2022-01-10 07:14:32,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.4745002039983681) internal successors, (3614), 2451 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3614 transitions. [2022-01-10 07:14:32,123 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3614 transitions. Word has length 76 [2022-01-10 07:14:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:32,123 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3614 transitions. [2022-01-10 07:14:32,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.625) internal successors, (138), 15 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3614 transitions. [2022-01-10 07:14:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 07:14:32,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:32,124 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:32,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:32,331 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 07:14:32,331 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash -34257664, now seen corresponding path program 1 times [2022-01-10 07:14:32,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273141714] [2022-01-10 07:14:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:32,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:32,333 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 07:14:32,334 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 07:14:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:32,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:32,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:33,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:33,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273141714] [2022-01-10 07:14:33,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273141714] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:33,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:33,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:33,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319862701] [2022-01-10 07:14:33,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:33,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:33,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:33,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:33,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:33,305 INFO L87 Difference]: Start difference. First operand 2452 states and 3614 transitions. Second operand has 16 states, 16 states have (on average 8.25) internal successors, (132), 15 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:33,482 INFO L93 Difference]: Finished difference Result 4087 states and 6065 transitions. [2022-01-10 07:14:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.25) internal successors, (132), 15 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 07:14:33,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:33,489 INFO L225 Difference]: With dead ends: 4087 [2022-01-10 07:14:33,489 INFO L226 Difference]: Without dead ends: 2453 [2022-01-10 07:14:33,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:33,491 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 73 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:33,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 639 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-01-10 07:14:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2022-01-10 07:14:33,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2452. [2022-01-10 07:14:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.474092207262342) internal successors, (3613), 2451 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3613 transitions. [2022-01-10 07:14:33,565 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3613 transitions. Word has length 76 [2022-01-10 07:14:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:33,565 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3613 transitions. [2022-01-10 07:14:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.25) internal successors, (132), 15 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3613 transitions. [2022-01-10 07:14:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-10 07:14:33,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:33,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:33,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 07:14:33,773 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 07:14:33,774 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:33,774 INFO L85 PathProgramCache]: Analyzing trace with hash -31046477, now seen corresponding path program 1 times [2022-01-10 07:14:33,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:33,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725492049] [2022-01-10 07:14:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:33,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:33,775 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 07:14:33,776 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 07:14:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:33,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:14:33,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:34,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:34,064 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:34,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725492049] [2022-01-10 07:14:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725492049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:34,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:34,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:14:34,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791948486] [2022-01-10 07:14:34,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:34,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:14:34,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:14:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:14:34,065 INFO L87 Difference]: Start difference. First operand 2452 states and 3613 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:34,152 INFO L93 Difference]: Finished difference Result 4838 states and 7150 transitions. [2022-01-10 07:14:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-01-10 07:14:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:34,158 INFO L225 Difference]: With dead ends: 4838 [2022-01-10 07:14:34,159 INFO L226 Difference]: Without dead ends: 2452 [2022-01-10 07:14:34,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:34,161 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:34,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 170 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-01-10 07:14:34,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-01-10 07:14:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2452. [2022-01-10 07:14:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.4736842105263157) internal successors, (3612), 2451 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3612 transitions. [2022-01-10 07:14:34,228 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3612 transitions. Word has length 76 [2022-01-10 07:14:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:34,228 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3612 transitions. [2022-01-10 07:14:34,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3612 transitions. [2022-01-10 07:14:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:34,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:34,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:34,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:34,439 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 07:14:34,439 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:34,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 6265423, now seen corresponding path program 1 times [2022-01-10 07:14:34,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:34,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967308440] [2022-01-10 07:14:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:34,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:34,441 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 07:14:34,442 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 07:14:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:34,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:34,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:34,612 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 07:14:34,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:34,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:34,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967308440] [2022-01-10 07:14:34,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967308440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:34,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:34,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:34,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552563965] [2022-01-10 07:14:34,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:34,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:34,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:34,613 INFO L87 Difference]: Start difference. First operand 2452 states and 3612 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:34,723 INFO L93 Difference]: Finished difference Result 4838 states and 7149 transitions. [2022-01-10 07:14:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:34,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:34,730 INFO L225 Difference]: With dead ends: 4838 [2022-01-10 07:14:34,730 INFO L226 Difference]: Without dead ends: 2452 [2022-01-10 07:14:34,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:34,733 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 63 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:34,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 112 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:34,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-01-10 07:14:34,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2452. [2022-01-10 07:14:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.4585883312933496) internal successors, (3575), 2451 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3575 transitions. [2022-01-10 07:14:34,813 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3575 transitions. Word has length 77 [2022-01-10 07:14:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:34,813 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3575 transitions. [2022-01-10 07:14:34,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3575 transitions. [2022-01-10 07:14:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:34,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:34,814 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:34,821 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 07:14:35,020 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 07:14:35,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:35,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1946661132, now seen corresponding path program 1 times [2022-01-10 07:14:35,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:35,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260061424] [2022-01-10 07:14:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:35,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:35,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:35,023 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 07:14:35,024 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 07:14:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:35,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:35,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:35,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:35,173 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260061424] [2022-01-10 07:14:35,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260061424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:35,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:35,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:35,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552224018] [2022-01-10 07:14:35,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:35,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:35,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:35,180 INFO L87 Difference]: Start difference. First operand 2452 states and 3575 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:35,249 INFO L93 Difference]: Finished difference Result 4840 states and 7077 transitions. [2022-01-10 07:14:35,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:35,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:35,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:35,256 INFO L225 Difference]: With dead ends: 4840 [2022-01-10 07:14:35,256 INFO L226 Difference]: Without dead ends: 2454 [2022-01-10 07:14:35,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:35,261 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 46 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:35,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 226 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-01-10 07:14:35,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2452. [2022-01-10 07:14:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2452 states, 2451 states have (on average 1.4430844553243574) internal successors, (3537), 2451 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3537 transitions. [2022-01-10 07:14:35,332 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3537 transitions. Word has length 77 [2022-01-10 07:14:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:35,333 INFO L470 AbstractCegarLoop]: Abstraction has 2452 states and 3537 transitions. [2022-01-10 07:14:35,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3537 transitions. [2022-01-10 07:14:35,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:35,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:35,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:35,343 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 07:14:35,541 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 07:14:35,541 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:35,541 INFO L85 PathProgramCache]: Analyzing trace with hash 222538201, now seen corresponding path program 1 times [2022-01-10 07:14:35,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:35,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212920322] [2022-01-10 07:14:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:35,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:35,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:35,543 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 07:14:35,544 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 07:14:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:36,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:36,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:36,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212920322] [2022-01-10 07:14:36,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212920322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:36,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:36,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:36,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431225348] [2022-01-10 07:14:36,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:36,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:36,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:36,594 INFO L87 Difference]: Start difference. First operand 2452 states and 3537 transitions. Second operand has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:36,766 INFO L93 Difference]: Finished difference Result 4173 states and 6036 transitions. [2022-01-10 07:14:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:14:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:36,773 INFO L225 Difference]: With dead ends: 4173 [2022-01-10 07:14:36,773 INFO L226 Difference]: Without dead ends: 2539 [2022-01-10 07:14:36,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:36,775 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 105 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:36,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 664 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 123 Unchecked, 0.0s Time] [2022-01-10 07:14:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2022-01-10 07:14:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2464. [2022-01-10 07:14:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 1.443361753958587) internal successors, (3555), 2463 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3555 transitions. [2022-01-10 07:14:36,848 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3555 transitions. Word has length 77 [2022-01-10 07:14:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:36,849 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 3555 transitions. [2022-01-10 07:14:36,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.0) internal successors, (144), 15 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3555 transitions. [2022-01-10 07:14:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:36,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:36,850 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:36,858 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 07:14:37,056 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 07:14:37,057 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:37,057 INFO L85 PathProgramCache]: Analyzing trace with hash -960313949, now seen corresponding path program 1 times [2022-01-10 07:14:37,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:37,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446153615] [2022-01-10 07:14:37,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:37,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:37,059 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 07:14:37,059 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 07:14:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:37,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:37,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:37,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446153615] [2022-01-10 07:14:37,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446153615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:37,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:37,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:37,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248462759] [2022-01-10 07:14:37,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:37,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:37,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:37,226 INFO L87 Difference]: Start difference. First operand 2464 states and 3555 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:37,271 INFO L93 Difference]: Finished difference Result 3313 states and 4792 transitions. [2022-01-10 07:14:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:37,285 INFO L225 Difference]: With dead ends: 3313 [2022-01-10 07:14:37,285 INFO L226 Difference]: Without dead ends: 927 [2022-01-10 07:14:37,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:37,289 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 39 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:37,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 212 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-01-10 07:14:37,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 921. [2022-01-10 07:14:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.4217391304347826) internal successors, (1308), 920 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1308 transitions. [2022-01-10 07:14:37,318 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1308 transitions. Word has length 77 [2022-01-10 07:14:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:37,318 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1308 transitions. [2022-01-10 07:14:37,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1308 transitions. [2022-01-10 07:14:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:37,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:37,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:37,327 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 07:14:37,527 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 07:14:37,527 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1931000004, now seen corresponding path program 1 times [2022-01-10 07:14:37,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554943961] [2022-01-10 07:14:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:37,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:37,529 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 07:14:37,530 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 07:14:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:37,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:37,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:37,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554943961] [2022-01-10 07:14:37,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554943961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:37,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:37,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:37,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867474814] [2022-01-10 07:14:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:37,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:37,677 INFO L87 Difference]: Start difference. First operand 921 states and 1308 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:37,730 INFO L93 Difference]: Finished difference Result 1746 states and 2504 transitions. [2022-01-10 07:14:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:37,732 INFO L225 Difference]: With dead ends: 1746 [2022-01-10 07:14:37,732 INFO L226 Difference]: Without dead ends: 921 [2022-01-10 07:14:37,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:37,733 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 57 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:37,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 96 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-10 07:14:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2022-01-10 07:14:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.4065217391304348) internal successors, (1294), 920 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1294 transitions. [2022-01-10 07:14:37,759 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1294 transitions. Word has length 77 [2022-01-10 07:14:37,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:37,759 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1294 transitions. [2022-01-10 07:14:37,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:37,760 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1294 transitions. [2022-01-10 07:14:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:37,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:37,760 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:37,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:37,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:37,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1144998027, now seen corresponding path program 1 times [2022-01-10 07:14:37,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:37,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804774858] [2022-01-10 07:14:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:37,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:37,969 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:37,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 07:14:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:38,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:38,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804774858] [2022-01-10 07:14:38,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804774858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:38,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:38,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:38,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863533135] [2022-01-10 07:14:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:38,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:38,112 INFO L87 Difference]: Start difference. First operand 921 states and 1294 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:38,188 INFO L93 Difference]: Finished difference Result 1758 states and 2492 transitions. [2022-01-10 07:14:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:38,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:38,190 INFO L225 Difference]: With dead ends: 1758 [2022-01-10 07:14:38,190 INFO L226 Difference]: Without dead ends: 921 [2022-01-10 07:14:38,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:38,191 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 66 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:38,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 126 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-01-10 07:14:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2022-01-10 07:14:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.391304347826087) internal successors, (1280), 920 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1280 transitions. [2022-01-10 07:14:38,230 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1280 transitions. Word has length 77 [2022-01-10 07:14:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:38,230 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1280 transitions. [2022-01-10 07:14:38,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1280 transitions. [2022-01-10 07:14:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 07:14:38,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:38,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:38,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:38,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,435 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:38,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2034320963, now seen corresponding path program 1 times [2022-01-10 07:14:38,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:38,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047390474] [2022-01-10 07:14:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:38,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:38,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:38,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 07:14:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:14:38,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:38,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:38,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047390474] [2022-01-10 07:14:38,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047390474] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:38,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:38,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:38,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337954793] [2022-01-10 07:14:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:38,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:38,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:38,577 INFO L87 Difference]: Start difference. First operand 921 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:38,652 INFO L93 Difference]: Finished difference Result 1739 states and 2445 transitions. [2022-01-10 07:14:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-10 07:14:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:38,653 INFO L225 Difference]: With dead ends: 1739 [2022-01-10 07:14:38,653 INFO L226 Difference]: Without dead ends: 896 [2022-01-10 07:14:38,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 07:14:38,655 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:38,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 130 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:38,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-10 07:14:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2022-01-10 07:14:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.3843575418994414) internal successors, (1239), 895 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1239 transitions. [2022-01-10 07:14:38,682 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1239 transitions. Word has length 77 [2022-01-10 07:14:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:38,683 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1239 transitions. [2022-01-10 07:14:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1239 transitions. [2022-01-10 07:14:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:14:38,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:38,683 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:38,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-01-10 07:14:38,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,890 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1243530004, now seen corresponding path program 1 times [2022-01-10 07:14:38,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456132178] [2022-01-10 07:14:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:38,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:38,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:38,892 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:38,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 07:14:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:39,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:39,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456132178] [2022-01-10 07:14:39,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456132178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:39,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:39,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:39,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657142711] [2022-01-10 07:14:39,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:39,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:39,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:39,049 INFO L87 Difference]: Start difference. First operand 896 states and 1239 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:39,072 INFO L93 Difference]: Finished difference Result 1308 states and 1817 transitions. [2022-01-10 07:14:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 07:14:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:39,081 INFO L225 Difference]: With dead ends: 1308 [2022-01-10 07:14:39,081 INFO L226 Difference]: Without dead ends: 490 [2022-01-10 07:14:39,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:39,083 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 32 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:39,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 193 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-10 07:14:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 488. [2022-01-10 07:14:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.3449691991786448) internal successors, (655), 487 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 655 transitions. [2022-01-10 07:14:39,100 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 655 transitions. Word has length 78 [2022-01-10 07:14:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:39,100 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 655 transitions. [2022-01-10 07:14:39,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 655 transitions. [2022-01-10 07:14:39,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-10 07:14:39,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:39,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:39,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:39,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:39,301 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:39,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1311232263, now seen corresponding path program 1 times [2022-01-10 07:14:39,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:39,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587410189] [2022-01-10 07:14:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:39,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:39,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:39,303 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:39,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 07:14:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:14:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:40,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:40,406 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:40,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587410189] [2022-01-10 07:14:40,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587410189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:40,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:40,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:14:40,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323682152] [2022-01-10 07:14:40,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:40,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:40,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:40,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:40,408 INFO L87 Difference]: Start difference. First operand 488 states and 655 transitions. Second operand has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:40,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:40,515 INFO L93 Difference]: Finished difference Result 912 states and 1250 transitions. [2022-01-10 07:14:40,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:40,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-01-10 07:14:40,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:40,526 INFO L225 Difference]: With dead ends: 912 [2022-01-10 07:14:40,526 INFO L226 Difference]: Without dead ends: 502 [2022-01-10 07:14:40,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-10 07:14:40,527 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 79 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:40,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 775 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 99 Unchecked, 0.0s Time] [2022-01-10 07:14:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-10 07:14:40,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 500. [2022-01-10 07:14:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.348697394789579) internal successors, (673), 499 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 673 transitions. [2022-01-10 07:14:40,543 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 673 transitions. Word has length 78 [2022-01-10 07:14:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:40,543 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 673 transitions. [2022-01-10 07:14:40,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.375) internal successors, (150), 15 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:40,543 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 673 transitions. [2022-01-10 07:14:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:40,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:40,544 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:40,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:40,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:40,750 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:40,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2107687664, now seen corresponding path program 1 times [2022-01-10 07:14:40,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:40,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303042331] [2022-01-10 07:14:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:40,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:40,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:40,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 07:14:40,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:40,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:14:40,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:40,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:40,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303042331] [2022-01-10 07:14:40,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303042331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:40,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:40,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:14:40,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170906061] [2022-01-10 07:14:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:40,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:14:40,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:14:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:14:40,920 INFO L87 Difference]: Start difference. First operand 500 states and 673 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:40,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:40,937 INFO L93 Difference]: Finished difference Result 708 states and 960 transitions. [2022-01-10 07:14:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:14:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:40,937 INFO L225 Difference]: With dead ends: 708 [2022-01-10 07:14:40,937 INFO L226 Difference]: Without dead ends: 298 [2022-01-10 07:14:40,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 07:14:40,938 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 26 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:40,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 176 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:14:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-01-10 07:14:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 296. [2022-01-10 07:14:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.2983050847457627) internal successors, (383), 295 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:40,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 383 transitions. [2022-01-10 07:14:40,948 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 383 transitions. Word has length 79 [2022-01-10 07:14:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:40,948 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 383 transitions. [2022-01-10 07:14:40,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 383 transitions. [2022-01-10 07:14:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:40,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:40,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:40,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 07:14:41,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:41,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:41,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1748552464, now seen corresponding path program 1 times [2022-01-10 07:14:41,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:41,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002383079] [2022-01-10 07:14:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:41,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:41,155 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 07:14:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:41,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:14:41,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:41,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:41,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002383079] [2022-01-10 07:14:41,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002383079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:41,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:41,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:41,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496334310] [2022-01-10 07:14:41,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:41,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:41,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:41,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:41,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:41,630 INFO L87 Difference]: Start difference. First operand 296 states and 383 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:41,705 INFO L93 Difference]: Finished difference Result 660 states and 878 transitions. [2022-01-10 07:14:41,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:41,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:41,717 INFO L225 Difference]: With dead ends: 660 [2022-01-10 07:14:41,717 INFO L226 Difference]: Without dead ends: 590 [2022-01-10 07:14:41,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:41,718 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 382 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:41,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 477 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-10 07:14:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 442. [2022-01-10 07:14:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 1.3038548752834467) internal successors, (575), 441 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 575 transitions. [2022-01-10 07:14:41,735 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 575 transitions. Word has length 79 [2022-01-10 07:14:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:41,735 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 575 transitions. [2022-01-10 07:14:41,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 575 transitions. [2022-01-10 07:14:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:41,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:41,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:41,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:41,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:41,943 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:41,943 INFO L85 PathProgramCache]: Analyzing trace with hash -33447248, now seen corresponding path program 1 times [2022-01-10 07:14:41,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:41,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237170177] [2022-01-10 07:14:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:41,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:41,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:41,944 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:41,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 07:14:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:42,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:42,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:42,414 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 07:14:42,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:42,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:42,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237170177] [2022-01-10 07:14:42,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237170177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:42,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:42,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:42,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127971208] [2022-01-10 07:14:42,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:42,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:42,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:42,415 INFO L87 Difference]: Start difference. First operand 442 states and 575 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:42,506 INFO L93 Difference]: Finished difference Result 738 states and 980 transitions. [2022-01-10 07:14:42,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:42,507 INFO L225 Difference]: With dead ends: 738 [2022-01-10 07:14:42,507 INFO L226 Difference]: Without dead ends: 668 [2022-01-10 07:14:42,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:42,508 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 442 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:42,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 485 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:42,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-10 07:14:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 514. [2022-01-10 07:14:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.304093567251462) internal successors, (669), 513 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 669 transitions. [2022-01-10 07:14:42,528 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 669 transitions. Word has length 79 [2022-01-10 07:14:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:42,528 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 669 transitions. [2022-01-10 07:14:42,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 669 transitions. [2022-01-10 07:14:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:42,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:42,529 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:42,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:42,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,739 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:42,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:42,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1312301421, now seen corresponding path program 1 times [2022-01-10 07:14:42,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:42,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777451804] [2022-01-10 07:14:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:42,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:42,741 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:42,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 07:14:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:42,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:14:43,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:43,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:43,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777451804] [2022-01-10 07:14:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777451804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:43,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:43,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:43,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641570118] [2022-01-10 07:14:43,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:43,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:43,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:43,230 INFO L87 Difference]: Start difference. First operand 514 states and 669 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:43,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:43,314 INFO L93 Difference]: Finished difference Result 806 states and 1070 transitions. [2022-01-10 07:14:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:43,315 INFO L225 Difference]: With dead ends: 806 [2022-01-10 07:14:43,315 INFO L226 Difference]: Without dead ends: 600 [2022-01-10 07:14:43,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:43,316 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 306 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:43,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 594 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-10 07:14:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 446. [2022-01-10 07:14:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.2876404494382023) internal successors, (573), 445 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 573 transitions. [2022-01-10 07:14:43,334 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 573 transitions. Word has length 79 [2022-01-10 07:14:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:43,334 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 573 transitions. [2022-01-10 07:14:43,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 573 transitions. [2022-01-10 07:14:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 07:14:43,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:43,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:43,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 07:14:43,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:43,535 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1345590733, now seen corresponding path program 1 times [2022-01-10 07:14:43,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:43,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556945975] [2022-01-10 07:14:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:43,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:43,537 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:43,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 07:14:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:43,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 07:14:43,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:14:44,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:14:44,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556945975] [2022-01-10 07:14:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556945975] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:14:44,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:14:44,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 07:14:44,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157010769] [2022-01-10 07:14:44,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:14:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:14:44,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:44,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:14:44,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:44,017 INFO L87 Difference]: Start difference. First operand 446 states and 573 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:44,100 INFO L93 Difference]: Finished difference Result 742 states and 978 transitions. [2022-01-10 07:14:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:14:44,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-01-10 07:14:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:44,101 INFO L225 Difference]: With dead ends: 742 [2022-01-10 07:14:44,101 INFO L226 Difference]: Without dead ends: 672 [2022-01-10 07:14:44,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:14:44,102 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 335 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:44,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 629 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 07:14:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-10 07:14:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 524. [2022-01-10 07:14:44,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.2906309751434035) internal successors, (675), 523 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 675 transitions. [2022-01-10 07:14:44,125 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 675 transitions. Word has length 79 [2022-01-10 07:14:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:44,125 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 675 transitions. [2022-01-10 07:14:44,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 675 transitions. [2022-01-10 07:14:44,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:14:44,125 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:44,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:44,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 07:14:44,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,330 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:44,330 INFO L85 PathProgramCache]: Analyzing trace with hash 916702534, now seen corresponding path program 1 times [2022-01-10 07:14:44,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:44,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224116396] [2022-01-10 07:14:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:44,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:44,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:44,332 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:44,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 07:14:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:44,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:14:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:44,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:45,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:45,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:45,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224116396] [2022-01-10 07:14:45,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224116396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:45,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:45,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-01-10 07:14:45,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737535481] [2022-01-10 07:14:45,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:45,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:14:45,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:14:45,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:14:45,135 INFO L87 Difference]: Start difference. First operand 524 states and 675 transitions. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:45,233 INFO L93 Difference]: Finished difference Result 666 states and 866 transitions. [2022-01-10 07:14:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:14:45,234 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 07:14:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:45,235 INFO L225 Difference]: With dead ends: 666 [2022-01-10 07:14:45,235 INFO L226 Difference]: Without dead ends: 502 [2022-01-10 07:14:45,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-10 07:14:45,235 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 63 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:45,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 666 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-01-10 07:14:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-01-10 07:14:45,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2022-01-10 07:14:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.2894211576846308) internal successors, (646), 501 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 646 transitions. [2022-01-10 07:14:45,257 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 646 transitions. Word has length 80 [2022-01-10 07:14:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:45,257 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 646 transitions. [2022-01-10 07:14:45,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 646 transitions. [2022-01-10 07:14:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:14:45,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:45,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:45,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:45,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:45,465 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:45,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:45,465 INFO L85 PathProgramCache]: Analyzing trace with hash 230432137, now seen corresponding path program 1 times [2022-01-10 07:14:45,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:45,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657867885] [2022-01-10 07:14:45,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:45,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:45,466 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:45,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 07:14:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-10 07:14:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:48,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:50,752 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:50,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657867885] [2022-01-10 07:14:50,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657867885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:50,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:50,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2022-01-10 07:14:50,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825568115] [2022-01-10 07:14:50,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:50,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-10 07:14:50,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-10 07:14:50,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2020, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 07:14:50,754 INFO L87 Difference]: Start difference. First operand 502 states and 646 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:51,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:51,560 INFO L93 Difference]: Finished difference Result 849 states and 1083 transitions. [2022-01-10 07:14:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-10 07:14:51,561 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 07:14:51,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:51,562 INFO L225 Difference]: With dead ends: 849 [2022-01-10 07:14:51,562 INFO L226 Difference]: Without dead ends: 707 [2022-01-10 07:14:51,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 07:14:51,563 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 230 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1508 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:51,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 1508 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 511 Invalid, 0 Unknown, 172 Unchecked, 0.4s Time] [2022-01-10 07:14:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-01-10 07:14:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 513. [2022-01-10 07:14:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.287109375) internal successors, (659), 512 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 659 transitions. [2022-01-10 07:14:51,589 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 659 transitions. Word has length 80 [2022-01-10 07:14:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:51,589 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 659 transitions. [2022-01-10 07:14:51,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 659 transitions. [2022-01-10 07:14:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 07:14:51,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:51,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:51,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:51,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:51,791 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash -512456061, now seen corresponding path program 1 times [2022-01-10 07:14:51,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:51,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984211924] [2022-01-10 07:14:51,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:51,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:51,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:51,793 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:51,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 07:14:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:51,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 07:14:51,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:53,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:54,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:54,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984211924] [2022-01-10 07:14:54,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984211924] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:54,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:54,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-10 07:14:54,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202492270] [2022-01-10 07:14:54,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:54,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 07:14:54,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:54,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 07:14:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-10 07:14:54,125 INFO L87 Difference]: Start difference. First operand 513 states and 659 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:54,314 INFO L93 Difference]: Finished difference Result 833 states and 1078 transitions. [2022-01-10 07:14:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 07:14:54,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-01-10 07:14:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:54,315 INFO L225 Difference]: With dead ends: 833 [2022-01-10 07:14:54,315 INFO L226 Difference]: Without dead ends: 681 [2022-01-10 07:14:54,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:54,316 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 148 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:54,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1280 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-01-10 07:14:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-01-10 07:14:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 499. [2022-01-10 07:14:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.2891566265060241) internal successors, (642), 498 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 642 transitions. [2022-01-10 07:14:54,342 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 642 transitions. Word has length 80 [2022-01-10 07:14:54,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:54,342 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 642 transitions. [2022-01-10 07:14:54,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 642 transitions. [2022-01-10 07:14:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:54,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:54,342 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:14:54,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:54,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:54,547 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:54,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:54,547 INFO L85 PathProgramCache]: Analyzing trace with hash -513709199, now seen corresponding path program 1 times [2022-01-10 07:14:54,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:54,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404225824] [2022-01-10 07:14:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:54,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:54,549 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:54,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 07:14:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 07:14:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:14:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:56,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:14:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:14:56,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:14:56,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404225824] [2022-01-10 07:14:56,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404225824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:14:56,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:14:56,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-01-10 07:14:56,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955465404] [2022-01-10 07:14:56,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:14:56,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 07:14:56,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:14:56,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 07:14:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-01-10 07:14:56,906 INFO L87 Difference]: Start difference. First operand 499 states and 642 transitions. Second operand has 29 states, 29 states have (on average 5.137931034482759) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:14:57,089 INFO L93 Difference]: Finished difference Result 819 states and 1049 transitions. [2022-01-10 07:14:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:14:57,090 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.137931034482759) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:14:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:14:57,091 INFO L225 Difference]: With dead ends: 819 [2022-01-10 07:14:57,091 INFO L226 Difference]: Without dead ends: 677 [2022-01-10 07:14:57,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:14:57,092 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 173 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 07:14:57,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 1441 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-01-10 07:14:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-10 07:14:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 484. [2022-01-10 07:14:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.2919254658385093) internal successors, (624), 483 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 624 transitions. [2022-01-10 07:14:57,127 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 624 transitions. Word has length 81 [2022-01-10 07:14:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:14:57,127 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 624 transitions. [2022-01-10 07:14:57,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.137931034482759) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:14:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 624 transitions. [2022-01-10 07:14:57,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:14:57,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:14:57,128 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:14:57,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 07:14:57,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:14:57,331 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:14:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:14:57,332 INFO L85 PathProgramCache]: Analyzing trace with hash 697899982, now seen corresponding path program 1 times [2022-01-10 07:14:57,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:14:57,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285817828] [2022-01-10 07:14:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:14:57,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:14:57,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:14:57,333 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:14:57,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 07:14:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:14:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-10 07:14:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:03,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:08,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285817828] [2022-01-10 07:15:08,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285817828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:08,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:08,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2022-01-10 07:15:08,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185591375] [2022-01-10 07:15:08,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:08,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-10 07:15:08,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-10 07:15:08,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2022-01-10 07:15:08,172 INFO L87 Difference]: Start difference. First operand 484 states and 624 transitions. Second operand has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:08,867 INFO L93 Difference]: Finished difference Result 656 states and 849 transitions. [2022-01-10 07:15:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-10 07:15:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:15:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:08,868 INFO L225 Difference]: With dead ends: 656 [2022-01-10 07:15:08,868 INFO L226 Difference]: Without dead ends: 518 [2022-01-10 07:15:08,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-01-10 07:15:08,870 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 133 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:08,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 1364 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 326 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-01-10 07:15:08,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-10 07:15:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 500. [2022-01-10 07:15:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 1.2885771543086173) internal successors, (643), 499 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 643 transitions. [2022-01-10 07:15:08,898 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 643 transitions. Word has length 81 [2022-01-10 07:15:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:08,898 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 643 transitions. [2022-01-10 07:15:08,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.2127659574468086) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 643 transitions. [2022-01-10 07:15:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 07:15:08,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:08,899 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:08,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:09,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:09,107 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:09,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:09,108 INFO L85 PathProgramCache]: Analyzing trace with hash 701073899, now seen corresponding path program 1 times [2022-01-10 07:15:09,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:09,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544064257] [2022-01-10 07:15:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:09,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:09,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:09,109 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:09,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 07:15:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:09,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:15:09,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:09,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:09,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:09,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544064257] [2022-01-10 07:15:09,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544064257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:09,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:09,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:15:09,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926065624] [2022-01-10 07:15:09,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:09,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:15:09,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:15:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:09,484 INFO L87 Difference]: Start difference. First operand 500 states and 643 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:09,592 INFO L93 Difference]: Finished difference Result 1365 states and 1764 transitions. [2022-01-10 07:15:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:15:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-10 07:15:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:09,594 INFO L225 Difference]: With dead ends: 1365 [2022-01-10 07:15:09,594 INFO L226 Difference]: Without dead ends: 955 [2022-01-10 07:15:09,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:15:09,595 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 171 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:09,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 414 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-10 07:15:09,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-10 07:15:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 919. [2022-01-10 07:15:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 1.266884531590414) internal successors, (1163), 918 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1163 transitions. [2022-01-10 07:15:09,651 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1163 transitions. Word has length 81 [2022-01-10 07:15:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:09,651 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1163 transitions. [2022-01-10 07:15:09,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1163 transitions. [2022-01-10 07:15:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 07:15:09,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:09,652 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 07:15:09,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 07:15:09,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:09,852 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash -895644954, now seen corresponding path program 1 times [2022-01-10 07:15:09,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:09,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840654517] [2022-01-10 07:15:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:09,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:09,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:09,854 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:09,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 07:15:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:10,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:10,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840654517] [2022-01-10 07:15:10,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840654517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:10,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:10,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-01-10 07:15:10,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393836913] [2022-01-10 07:15:10,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:10,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-10 07:15:10,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-10 07:15:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-10 07:15:10,975 INFO L87 Difference]: Start difference. First operand 919 states and 1163 transitions. Second operand has 17 states, 17 states have (on average 8.529411764705882) internal successors, (145), 17 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:11,095 INFO L93 Difference]: Finished difference Result 1139 states and 1449 transitions. [2022-01-10 07:15:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.529411764705882) internal successors, (145), 17 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 07:15:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:11,097 INFO L225 Difference]: With dead ends: 1139 [2022-01-10 07:15:11,097 INFO L226 Difference]: Without dead ends: 849 [2022-01-10 07:15:11,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-01-10 07:15:11,097 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 68 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:11,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 877 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 65 Unchecked, 0.0s Time] [2022-01-10 07:15:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-01-10 07:15:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 833. [2022-01-10 07:15:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 1.2620192307692308) internal successors, (1050), 832 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1050 transitions. [2022-01-10 07:15:11,149 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1050 transitions. Word has length 82 [2022-01-10 07:15:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:11,149 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1050 transitions. [2022-01-10 07:15:11,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.529411764705882) internal successors, (145), 17 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1050 transitions. [2022-01-10 07:15:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-10 07:15:11,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:11,150 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] [2022-01-10 07:15:11,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 07:15:11,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:11,350 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1409212898, now seen corresponding path program 1 times [2022-01-10 07:15:11,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224486945] [2022-01-10 07:15:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:11,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:11,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:11,352 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:11,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 07:15:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:11,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 07:15:11,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:11,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 07:15:11,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224486945] [2022-01-10 07:15:11,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224486945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:11,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:11,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 07:15:11,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894304527] [2022-01-10 07:15:11,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:11,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 07:15:11,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:11,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 07:15:11,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:11,725 INFO L87 Difference]: Start difference. First operand 833 states and 1050 transitions. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:11,797 INFO L93 Difference]: Finished difference Result 1545 states and 1963 transitions. [2022-01-10 07:15:11,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 07:15:11,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-01-10 07:15:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:11,799 INFO L225 Difference]: With dead ends: 1545 [2022-01-10 07:15:11,799 INFO L226 Difference]: Without dead ends: 824 [2022-01-10 07:15:11,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:15:11,800 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 126 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:11,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 419 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-01-10 07:15:11,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-10 07:15:11,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 798. [2022-01-10 07:15:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 1.2622333751568382) internal successors, (1006), 797 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1006 transitions. [2022-01-10 07:15:11,845 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1006 transitions. Word has length 82 [2022-01-10 07:15:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:11,845 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1006 transitions. [2022-01-10 07:15:11,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1006 transitions. [2022-01-10 07:15:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:11,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:11,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:11,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:12,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:12,047 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:12,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:12,047 INFO L85 PathProgramCache]: Analyzing trace with hash -323517319, now seen corresponding path program 1 times [2022-01-10 07:15:12,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:12,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745540162] [2022-01-10 07:15:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:12,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:12,048 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:12,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 07:15:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:12,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:12,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:15:12,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:15:13,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:13,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745540162] [2022-01-10 07:15:13,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745540162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:13,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:13,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:13,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131457243] [2022-01-10 07:15:13,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:13,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:13,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:13,338 INFO L87 Difference]: Start difference. First operand 798 states and 1006 transitions. Second operand has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:13,495 INFO L93 Difference]: Finished difference Result 1537 states and 1952 transitions. [2022-01-10 07:15:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:13,496 INFO L225 Difference]: With dead ends: 1537 [2022-01-10 07:15:13,497 INFO L226 Difference]: Without dead ends: 827 [2022-01-10 07:15:13,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:13,498 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 90 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:13,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 689 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 82 Unchecked, 0.0s Time] [2022-01-10 07:15:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-01-10 07:15:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-01-10 07:15:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.2566585956416465) internal successors, (1038), 826 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1038 transitions. [2022-01-10 07:15:13,545 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1038 transitions. Word has length 132 [2022-01-10 07:15:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:13,545 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1038 transitions. [2022-01-10 07:15:13,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 17 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1038 transitions. [2022-01-10 07:15:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:13,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:13,546 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:13,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:13,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:13,746 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1925987042, now seen corresponding path program 1 times [2022-01-10 07:15:13,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [543460655] [2022-01-10 07:15:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:13,747 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:13,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:13,748 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:13,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 07:15:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 66 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:15:14,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 66 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 07:15:15,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [543460655] [2022-01-10 07:15:15,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [543460655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:15,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:15,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:15,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111750929] [2022-01-10 07:15:15,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:15,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:15,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:15,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:15,179 INFO L87 Difference]: Start difference. First operand 827 states and 1038 transitions. Second operand has 18 states, 18 states have (on average 12.0) internal successors, (216), 17 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:15,348 INFO L93 Difference]: Finished difference Result 1582 states and 2001 transitions. [2022-01-10 07:15:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:15,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.0) internal successors, (216), 17 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:15,349 INFO L225 Difference]: With dead ends: 1582 [2022-01-10 07:15:15,349 INFO L226 Difference]: Without dead ends: 878 [2022-01-10 07:15:15,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:15,351 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 116 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:15,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 808 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 100 Unchecked, 0.0s Time] [2022-01-10 07:15:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-01-10 07:15:15,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2022-01-10 07:15:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 1.2474344355758267) internal successors, (1094), 877 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1094 transitions. [2022-01-10 07:15:15,404 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1094 transitions. Word has length 132 [2022-01-10 07:15:15,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:15,404 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1094 transitions. [2022-01-10 07:15:15,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.0) internal successors, (216), 17 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:15,404 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1094 transitions. [2022-01-10 07:15:15,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:15,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:15,405 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:15,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 07:15:15,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:15,609 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1455485273, now seen corresponding path program 1 times [2022-01-10 07:15:15,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:15,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336641351] [2022-01-10 07:15:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:15,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:15,610 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:15,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 07:15:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:15:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 07:15:17,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336641351] [2022-01-10 07:15:17,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336641351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:17,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:17,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:17,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165659191] [2022-01-10 07:15:17,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:17,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:17,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:17,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:17,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:17,014 INFO L87 Difference]: Start difference. First operand 878 states and 1094 transitions. Second operand has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 17 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:17,175 INFO L93 Difference]: Finished difference Result 1660 states and 2085 transitions. [2022-01-10 07:15:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 17 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:17,177 INFO L225 Difference]: With dead ends: 1660 [2022-01-10 07:15:17,177 INFO L226 Difference]: Without dead ends: 962 [2022-01-10 07:15:17,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:17,179 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 124 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:17,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 784 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 110 Unchecked, 0.0s Time] [2022-01-10 07:15:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-10 07:15:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 962. [2022-01-10 07:15:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 1.2330905306971904) internal successors, (1185), 961 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1185 transitions. [2022-01-10 07:15:17,239 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1185 transitions. Word has length 132 [2022-01-10 07:15:17,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:17,239 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 1185 transitions. [2022-01-10 07:15:17,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.333333333333334) internal successors, (222), 17 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:17,239 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1185 transitions. [2022-01-10 07:15:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:17,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:17,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:17,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 07:15:17,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:17,447 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:17,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash -495858626, now seen corresponding path program 1 times [2022-01-10 07:15:17,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:17,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937437722] [2022-01-10 07:15:17,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:17,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:17,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:17,449 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:17,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 07:15:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:17,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:18,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:19,293 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:19,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937437722] [2022-01-10 07:15:19,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937437722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:19,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:19,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:15:19,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954958924] [2022-01-10 07:15:19,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:19,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:15:19,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:19,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:15:19,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:15:19,294 INFO L87 Difference]: Start difference. First operand 962 states and 1185 transitions. Second operand has 26 states, 26 states have (on average 9.538461538461538) internal successors, (248), 25 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:19,503 INFO L93 Difference]: Finished difference Result 1672 states and 2086 transitions. [2022-01-10 07:15:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 07:15:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.538461538461538) internal successors, (248), 25 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:19,504 INFO L225 Difference]: With dead ends: 1672 [2022-01-10 07:15:19,504 INFO L226 Difference]: Without dead ends: 1028 [2022-01-10 07:15:19,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:15:19,506 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 171 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:19,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1496 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 138 Unchecked, 0.0s Time] [2022-01-10 07:15:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-01-10 07:15:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1019. [2022-01-10 07:15:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 1.2269155206286837) internal successors, (1249), 1018 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1249 transitions. [2022-01-10 07:15:19,569 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1249 transitions. Word has length 132 [2022-01-10 07:15:19,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:19,569 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 1249 transitions. [2022-01-10 07:15:19,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.538461538461538) internal successors, (248), 25 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1249 transitions. [2022-01-10 07:15:19,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:19,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:19,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:19,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-01-10 07:15:19,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:19,771 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:19,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:19,771 INFO L85 PathProgramCache]: Analyzing trace with hash -199813198, now seen corresponding path program 1 times [2022-01-10 07:15:19,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:19,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400888649] [2022-01-10 07:15:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:19,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:19,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:19,772 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:19,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 07:15:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:19,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:21,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:21,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:21,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400888649] [2022-01-10 07:15:21,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400888649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:21,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:21,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:15:21,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043480165] [2022-01-10 07:15:21,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:21,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:15:21,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:15:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:15:21,750 INFO L87 Difference]: Start difference. First operand 1019 states and 1249 transitions. Second operand has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 25 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:21,997 INFO L93 Difference]: Finished difference Result 1746 states and 2172 transitions. [2022-01-10 07:15:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:15:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 25 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:22,000 INFO L225 Difference]: With dead ends: 1746 [2022-01-10 07:15:22,000 INFO L226 Difference]: Without dead ends: 1114 [2022-01-10 07:15:22,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:15:22,001 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 188 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:22,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1323 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 141 Unchecked, 0.0s Time] [2022-01-10 07:15:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-01-10 07:15:22,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1114. [2022-01-10 07:15:22,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 1.2219227313566936) internal successors, (1360), 1113 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1360 transitions. [2022-01-10 07:15:22,073 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1360 transitions. Word has length 132 [2022-01-10 07:15:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:22,074 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1360 transitions. [2022-01-10 07:15:22,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 25 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1360 transitions. [2022-01-10 07:15:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:22,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:22,075 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:22,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 07:15:22,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:22,283 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2130858789, now seen corresponding path program 1 times [2022-01-10 07:15:22,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:22,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059724791] [2022-01-10 07:15:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:22,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:22,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:22,284 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:22,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 07:15:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:22,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 44 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:23,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 44 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:24,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:24,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059724791] [2022-01-10 07:15:24,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059724791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:24,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:24,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:15:24,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540863131] [2022-01-10 07:15:24,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:24,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:15:24,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:24,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:15:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:15:24,051 INFO L87 Difference]: Start difference. First operand 1114 states and 1360 transitions. Second operand has 26 states, 26 states have (on average 9.307692307692308) internal successors, (242), 25 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:24,297 INFO L93 Difference]: Finished difference Result 2004 states and 2455 transitions. [2022-01-10 07:15:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 07:15:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.307692307692308) internal successors, (242), 25 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:24,299 INFO L225 Difference]: With dead ends: 2004 [2022-01-10 07:15:24,299 INFO L226 Difference]: Without dead ends: 1354 [2022-01-10 07:15:24,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-01-10 07:15:24,300 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 172 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:24,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 1042 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 147 Unchecked, 0.0s Time] [2022-01-10 07:15:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-01-10 07:15:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1354. [2022-01-10 07:15:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1354 states, 1353 states have (on average 1.1943828529194382) internal successors, (1616), 1353 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:24,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1354 states to 1354 states and 1616 transitions. [2022-01-10 07:15:24,394 INFO L78 Accepts]: Start accepts. Automaton has 1354 states and 1616 transitions. Word has length 132 [2022-01-10 07:15:24,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:24,394 INFO L470 AbstractCegarLoop]: Abstraction has 1354 states and 1616 transitions. [2022-01-10 07:15:24,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.307692307692308) internal successors, (242), 25 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:24,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1354 states and 1616 transitions. [2022-01-10 07:15:24,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 07:15:24,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:24,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:24,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:24,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:24,603 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1132420541, now seen corresponding path program 1 times [2022-01-10 07:15:24,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185640981] [2022-01-10 07:15:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:24,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:24,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:24,605 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:24,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 07:15:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:15:25,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 07:15:26,038 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185640981] [2022-01-10 07:15:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185640981] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:26,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:26,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:26,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555102255] [2022-01-10 07:15:26,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:26,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:26,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:26,039 INFO L87 Difference]: Start difference. First operand 1354 states and 1616 transitions. Second operand has 18 states, 18 states have (on average 12.666666666666666) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:26,240 INFO L93 Difference]: Finished difference Result 2063 states and 2528 transitions. [2022-01-10 07:15:26,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:26,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.666666666666666) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2022-01-10 07:15:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:26,242 INFO L225 Difference]: With dead ends: 2063 [2022-01-10 07:15:26,242 INFO L226 Difference]: Without dead ends: 1371 [2022-01-10 07:15:26,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:26,243 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 103 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:26,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 870 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 95 Unchecked, 0.0s Time] [2022-01-10 07:15:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-01-10 07:15:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1371. [2022-01-10 07:15:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.1912408759124087) internal successors, (1632), 1370 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1632 transitions. [2022-01-10 07:15:26,333 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1632 transitions. Word has length 132 [2022-01-10 07:15:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:26,333 INFO L470 AbstractCegarLoop]: Abstraction has 1371 states and 1632 transitions. [2022-01-10 07:15:26,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.666666666666666) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1632 transitions. [2022-01-10 07:15:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 07:15:26,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:26,334 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:26,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:26,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:26,542 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1282485857, now seen corresponding path program 1 times [2022-01-10 07:15:26,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:26,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354748648] [2022-01-10 07:15:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:26,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:26,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:26,543 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:26,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 07:15:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 07:15:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:15:27,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 71 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 07:15:27,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:27,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354748648] [2022-01-10 07:15:27,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354748648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:27,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:27,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-01-10 07:15:27,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279934456] [2022-01-10 07:15:27,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:27,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 07:15:27,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:27,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 07:15:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-10 07:15:27,828 INFO L87 Difference]: Start difference. First operand 1371 states and 1632 transitions. Second operand has 18 states, 18 states have (on average 11.777777777777779) internal successors, (212), 17 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:28,039 INFO L93 Difference]: Finished difference Result 2080 states and 2544 transitions. [2022-01-10 07:15:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 07:15:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.777777777777779) internal successors, (212), 17 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-01-10 07:15:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:28,044 INFO L225 Difference]: With dead ends: 2080 [2022-01-10 07:15:28,044 INFO L226 Difference]: Without dead ends: 1370 [2022-01-10 07:15:28,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:28,050 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 138 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:28,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 881 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 122 Unchecked, 0.0s Time] [2022-01-10 07:15:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-01-10 07:15:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1370. [2022-01-10 07:15:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1369 states have (on average 1.185536888239591) internal successors, (1623), 1369 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 1623 transitions. [2022-01-10 07:15:28,140 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 1623 transitions. Word has length 133 [2022-01-10 07:15:28,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:28,141 INFO L470 AbstractCegarLoop]: Abstraction has 1370 states and 1623 transitions. [2022-01-10 07:15:28,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.777777777777779) internal successors, (212), 17 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 1623 transitions. [2022-01-10 07:15:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 07:15:28,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:28,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:28,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:28,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:28,350 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1110144550, now seen corresponding path program 1 times [2022-01-10 07:15:28,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:28,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185955016] [2022-01-10 07:15:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:28,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:28,352 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:28,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 07:15:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:28,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:28,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 30 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:29,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 30 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:30,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185955016] [2022-01-10 07:15:30,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185955016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:30,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:30,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-01-10 07:15:30,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63799644] [2022-01-10 07:15:30,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:30,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 07:15:30,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 07:15:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-10 07:15:30,236 INFO L87 Difference]: Start difference. First operand 1370 states and 1623 transitions. Second operand has 26 states, 26 states have (on average 9.615384615384615) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:30,453 INFO L93 Difference]: Finished difference Result 1699 states and 2035 transitions. [2022-01-10 07:15:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 07:15:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.615384615384615) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-01-10 07:15:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:30,454 INFO L225 Difference]: With dead ends: 1699 [2022-01-10 07:15:30,454 INFO L226 Difference]: Without dead ends: 1473 [2022-01-10 07:15:30,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-01-10 07:15:30,455 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 131 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:30,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 1687 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 152 Unchecked, 0.0s Time] [2022-01-10 07:15:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-01-10 07:15:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1465. [2022-01-10 07:15:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 1.1816939890710383) internal successors, (1730), 1464 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1730 transitions. [2022-01-10 07:15:30,549 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1730 transitions. Word has length 133 [2022-01-10 07:15:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 1465 states and 1730 transitions. [2022-01-10 07:15:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.615384615384615) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1730 transitions. [2022-01-10 07:15:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 07:15:30,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:30,551 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:30,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-01-10 07:15:30,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:30,759 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:30,759 INFO L85 PathProgramCache]: Analyzing trace with hash 516042849, now seen corresponding path program 1 times [2022-01-10 07:15:30,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993382570] [2022-01-10 07:15:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:30,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:30,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:30,761 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 07:15:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:15:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 07:15:31,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:15:31,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:31,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993382570] [2022-01-10 07:15:31,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993382570] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:15:31,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:15:31,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:15:31,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175703224] [2022-01-10 07:15:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:15:31,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:15:31,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:31,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:15:31,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:15:31,347 INFO L87 Difference]: Start difference. First operand 1465 states and 1730 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:31,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:31,508 INFO L93 Difference]: Finished difference Result 3113 states and 3812 transitions. [2022-01-10 07:15:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:15:31,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-01-10 07:15:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:31,515 INFO L225 Difference]: With dead ends: 3113 [2022-01-10 07:15:31,515 INFO L226 Difference]: Without dead ends: 2253 [2022-01-10 07:15:31,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:31,518 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 80 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 204 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 39 Unchecked, 0.0s Time] [2022-01-10 07:15:31,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-01-10 07:15:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2231. [2022-01-10 07:15:31,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 1.2053811659192826) internal successors, (2688), 2230 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 2688 transitions. [2022-01-10 07:15:31,664 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 2688 transitions. Word has length 133 [2022-01-10 07:15:31,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:31,664 INFO L470 AbstractCegarLoop]: Abstraction has 2231 states and 2688 transitions. [2022-01-10 07:15:31,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 2688 transitions. [2022-01-10 07:15:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 07:15:31,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:31,666 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:31,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:31,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:31,873 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:31,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1648275530, now seen corresponding path program 1 times [2022-01-10 07:15:31,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:31,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306012410] [2022-01-10 07:15:31,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:31,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:31,875 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:31,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 07:15:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:31,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:15:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 07:15:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 07:15:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 07:15:33,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306012410] [2022-01-10 07:15:33,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306012410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 07:15:33,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 07:15:33,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 07:15:33,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557038955] [2022-01-10 07:15:33,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 07:15:33,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 07:15:33,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 07:15:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-10 07:15:33,096 INFO L87 Difference]: Start difference. First operand 2231 states and 2688 transitions. Second operand has 16 states, 16 states have (on average 11.625) internal successors, (186), 15 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:33,435 INFO L93 Difference]: Finished difference Result 4337 states and 5390 transitions. [2022-01-10 07:15:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 07:15:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.625) internal successors, (186), 15 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-01-10 07:15:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:33,440 INFO L225 Difference]: With dead ends: 4337 [2022-01-10 07:15:33,440 INFO L226 Difference]: Without dead ends: 3687 [2022-01-10 07:15:33,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-01-10 07:15:33,441 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 133 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:33,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 960 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 106 Unchecked, 0.0s Time] [2022-01-10 07:15:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2022-01-10 07:15:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 3639. [2022-01-10 07:15:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 1.233644859813084) internal successors, (4488), 3638 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 4488 transitions. [2022-01-10 07:15:33,680 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 4488 transitions. Word has length 133 [2022-01-10 07:15:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:33,680 INFO L470 AbstractCegarLoop]: Abstraction has 3639 states and 4488 transitions. [2022-01-10 07:15:33,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.625) internal successors, (186), 15 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 4488 transitions. [2022-01-10 07:15:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 07:15:33,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:33,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:33,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:33,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:33,889 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:33,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1648253518, now seen corresponding path program 1 times [2022-01-10 07:15:33,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:33,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951559860] [2022-01-10 07:15:33,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:33,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:33,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:33,891 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:33,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-01-10 07:15:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:15:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 07:15:34,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:15:34,479 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:15:34,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951559860] [2022-01-10 07:15:34,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951559860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:15:34,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:15:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:15:34,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405776326] [2022-01-10 07:15:34,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:15:34,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:15:34,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:15:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:15:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:15:34,480 INFO L87 Difference]: Start difference. First operand 3639 states and 4488 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:15:34,749 INFO L93 Difference]: Finished difference Result 5002 states and 6247 transitions. [2022-01-10 07:15:34,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:15:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-01-10 07:15:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:15:34,754 INFO L225 Difference]: With dead ends: 5002 [2022-01-10 07:15:34,754 INFO L226 Difference]: Without dead ends: 4292 [2022-01-10 07:15:34,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:15:34,755 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 54 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:15:34,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 46 Unchecked, 0.0s Time] [2022-01-10 07:15:34,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4292 states. [2022-01-10 07:15:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4292 to 4290. [2022-01-10 07:15:35,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4290 states, 4289 states have (on average 1.2359524364653764) internal successors, (5301), 4289 states have internal predecessors, (5301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4290 states to 4290 states and 5301 transitions. [2022-01-10 07:15:35,061 INFO L78 Accepts]: Start accepts. Automaton has 4290 states and 5301 transitions. Word has length 133 [2022-01-10 07:15:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:15:35,062 INFO L470 AbstractCegarLoop]: Abstraction has 4290 states and 5301 transitions. [2022-01-10 07:15:35,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 07:15:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4290 states and 5301 transitions. [2022-01-10 07:15:35,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-10 07:15:35,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:15:35,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:15:35,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-01-10 07:15:35,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:15:35,271 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:15:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:15:35,271 INFO L85 PathProgramCache]: Analyzing trace with hash -691179991, now seen corresponding path program 1 times [2022-01-10 07:15:35,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:15:35,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499246176] [2022-01-10 07:15:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:15:35,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:15:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:15:35,273 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:15:35,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-01-10 07:15:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:15:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 07:15:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:15:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:15:36,897 INFO L328 TraceCheckSpWp]: Computing backward predicates...