/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/loops-crafted-1/discover_list.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:50:56,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:50:56,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:50:56,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 02:50:56,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 02:50:56,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 02:50:56,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 02:50:56,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 02:50:56,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 02:50:56,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 02:50:56,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 02:50:56,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 02:50:56,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 02:50:56,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 02:50:56,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 02:50:56,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 02:50:56,643 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 02:50:56,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 02:50:56,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 02:50:56,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 02:50:56,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 02:50:56,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 02:50:56,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 02:50:56,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 02:50:56,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 02:50:56,658 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 02:50:56,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 02:50:56,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 02:50:56,666 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 02:50:56,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:50:56,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:50:56,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:50:56,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:50:56,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:50:56,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:50:56,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:50:56,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:50:56,704 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:50:56,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:50:56,705 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 02:50:56,706 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 02:50:56,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:50:56,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:50:56,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:50:56,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:50:56,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:50:56,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:50:56,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:50:56,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:50:56,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 02:50:56,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:50:56,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:50:56,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:50:56,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:50:56,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:50:56,972 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:50:56,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-01-10 02:50:57,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa294eb89/8ec67671e995433fa3c775371f640fbe/FLAGf5b10ecf0 [2022-01-10 02:50:57,494 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:50:57,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c [2022-01-10 02:50:57,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa294eb89/8ec67671e995433fa3c775371f640fbe/FLAGf5b10ecf0 [2022-01-10 02:50:57,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa294eb89/8ec67671e995433fa3c775371f640fbe [2022-01-10 02:50:57,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:50:57,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:50:57,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:50:57,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:50:57,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:50:57,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:50:57" (1/1) ... [2022-01-10 02:50:57,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff41e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:57, skipping insertion in model container [2022-01-10 02:50:57,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:50:57" (1/1) ... [2022-01-10 02:50:57,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:50:57,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:50:58,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2022-01-10 02:50:58,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:50:58,171 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:50:58,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/discover_list.c[4997,5010] [2022-01-10 02:50:58,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:50:58,313 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:50:58,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58 WrapperNode [2022-01-10 02:50:58,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:50:58,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:50:58,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:50:58,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:50:58,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,390 INFO L137 Inliner]: procedures = 41, calls = 627, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 492 [2022-01-10 02:50:58,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:50:58,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:50:58,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:50:58,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:50:58,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:50:58,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:50:58,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:50:58,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:50:58,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (1/1) ... [2022-01-10 02:50:58,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:50:58,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:50:58,517 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 02:50:58,531 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 02:50:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:50:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-10 02:50:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 02:50:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-01-10 02:50:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 02:50:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 02:50:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure smp_send_req [2022-01-10 02:50:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-01-10 02:50:58,564 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-01-10 02:50:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 02:50:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:50:58,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:50:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-10 02:50:58,564 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-10 02:50:58,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-10 02:50:58,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 02:50:58,691 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:50:58,693 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:50:59,166 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:50:59,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:50:59,172 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 02:50:59,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:50:59 BoogieIcfgContainer [2022-01-10 02:50:59,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:50:59,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:50:59,175 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:50:59,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:50:59,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:50:57" (1/3) ... [2022-01-10 02:50:59,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f8f138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:50:59, skipping insertion in model container [2022-01-10 02:50:59,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:50:58" (2/3) ... [2022-01-10 02:50:59,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14f8f138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:50:59, skipping insertion in model container [2022-01-10 02:50:59,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:50:59" (3/3) ... [2022-01-10 02:50:59,181 INFO L111 eAbstractionObserver]: Analyzing ICFG discover_list.c [2022-01-10 02:50:59,185 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:50:59,185 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 02:50:59,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:50:59,238 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 02:50:59,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 02:50:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 64 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:50:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 02:50:59,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:50:59,262 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 02:50:59,262 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:50:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:50:59,270 INFO L85 PathProgramCache]: Analyzing trace with hash 611198103, now seen corresponding path program 1 times [2022-01-10 02:50:59,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:50:59,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483161340] [2022-01-10 02:50:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:50:59,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:50:59,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:50:59,291 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 02:50:59,330 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 02:50:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:50:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:50:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:50:59,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 02:50:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:50:59,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:50:59,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:50:59,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483161340] [2022-01-10 02:50:59,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483161340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:50:59,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:50:59,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:50:59,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864353774] [2022-01-10 02:50:59,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:50:59,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:50:59,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:50:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:50:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:50:59,857 INFO L87 Difference]: Start difference. First operand has 75 states, 63 states have (on average 1.5396825396825398) internal successors, (97), 64 states have internal predecessors, (97), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:51:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:00,272 INFO L93 Difference]: Finished difference Result 146 states and 225 transitions. [2022-01-10 02:51:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:51:00,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-01-10 02:51:00,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:00,284 INFO L225 Difference]: With dead ends: 146 [2022-01-10 02:51:00,285 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 02:51:00,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:51:00,294 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:00,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 353 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:51:00,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 02:51:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-10 02:51:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:00,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-01-10 02:51:00,330 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 38 [2022-01-10 02:51:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:00,331 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-01-10 02:51:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:51:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-01-10 02:51:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 02:51:00,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:00,333 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 02:51:00,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 02:51:00,533 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 02:51:00,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:00,535 INFO L85 PathProgramCache]: Analyzing trace with hash 885957717, now seen corresponding path program 1 times [2022-01-10 02:51:00,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:00,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329967930] [2022-01-10 02:51:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:00,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:00,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:00,537 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 02:51:00,539 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 02:51:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:51:00,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:51:00,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:51:00,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:00,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329967930] [2022-01-10 02:51:00,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329967930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:51:00,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:51:00,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:51:00,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421663018] [2022-01-10 02:51:00,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:51:00,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:51:00,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:51:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:51:00,837 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:51:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:00,873 INFO L93 Difference]: Finished difference Result 118 states and 160 transitions. [2022-01-10 02:51:00,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:51:00,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-01-10 02:51:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:00,875 INFO L225 Difference]: With dead ends: 118 [2022-01-10 02:51:00,875 INFO L226 Difference]: Without dead ends: 65 [2022-01-10 02:51:00,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 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 02:51:00,877 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 242 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 02:51:00,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 242 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:51:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-10 02:51:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-01-10 02:51:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:00,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2022-01-10 02:51:00,886 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 38 [2022-01-10 02:51:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:00,886 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2022-01-10 02:51:00,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:51:00,886 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2022-01-10 02:51:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 02:51:00,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:00,888 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 02:51:00,902 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 02:51:01,088 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 02:51:01,089 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash 430601657, now seen corresponding path program 1 times [2022-01-10 02:51:01,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:01,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733708700] [2022-01-10 02:51:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:51:01,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:01,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:01,092 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 02:51:01,094 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 02:51:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:01,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 02:51:01,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 02:51:01,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:51:01,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733708700] [2022-01-10 02:51:01,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733708700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:01,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:01,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-10 02:51:01,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546138401] [2022-01-10 02:51:01,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:01,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 02:51:01,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 02:51:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:51:01,564 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:01,757 INFO L93 Difference]: Finished difference Result 128 states and 174 transitions. [2022-01-10 02:51:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:51:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-10 02:51:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:01,759 INFO L225 Difference]: With dead ends: 128 [2022-01-10 02:51:01,759 INFO L226 Difference]: Without dead ends: 74 [2022-01-10 02:51:01,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-01-10 02:51:01,760 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 10 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:01,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 470 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:51:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-10 02:51:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-01-10 02:51:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 62 states have internal predecessors, (82), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2022-01-10 02:51:01,769 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 40 [2022-01-10 02:51:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:01,769 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2022-01-10 02:51:01,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2022-01-10 02:51:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 02:51:01,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:01,771 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2022-01-10 02:51:01,792 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 02:51:01,992 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 02:51:01,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash -996113707, now seen corresponding path program 2 times [2022-01-10 02:51:01,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:01,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042832753] [2022-01-10 02:51:01,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 02:51:01,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:01,996 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 02:51:01,998 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 02:51:02,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 02:51:02,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:02,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:51:02,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 02:51:02,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 02:51:03,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042832753] [2022-01-10 02:51:03,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042832753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:03,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:03,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-10 02:51:03,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487253991] [2022-01-10 02:51:03,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:03,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 02:51:03,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:03,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 02:51:03,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-01-10 02:51:03,124 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:03,794 INFO L93 Difference]: Finished difference Result 146 states and 199 transitions. [2022-01-10 02:51:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 02:51:03,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2022-01-10 02:51:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:03,796 INFO L225 Difference]: With dead ends: 146 [2022-01-10 02:51:03,796 INFO L226 Difference]: Without dead ends: 83 [2022-01-10 02:51:03,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:51:03,797 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 52 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:03,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 488 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-10 02:51:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-01-10 02:51:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 71 states have internal predecessors, (89), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-01-10 02:51:03,807 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 44 [2022-01-10 02:51:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:03,808 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-01-10 02:51:03,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-01-10 02:51:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 02:51:03,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:03,810 INFO L514 BasicCegarLoop]: trace histogram [15, 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] [2022-01-10 02:51:03,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:51:04,026 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 02:51:04,026 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1511070185, now seen corresponding path program 3 times [2022-01-10 02:51:04,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:04,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163436092] [2022-01-10 02:51:04,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 02:51:04,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:04,030 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 02:51:04,032 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 02:51:04,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 02:51:04,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:51:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 02:51:05,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 68 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 02:51:05,664 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163436092] [2022-01-10 02:51:05,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163436092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:05,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:05,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 02:51:05,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231428291] [2022-01-10 02:51:05,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:05,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 02:51:05,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:05,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 02:51:05,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:51:05,668 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 02:51:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:06,823 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2022-01-10 02:51:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 02:51:06,825 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2022-01-10 02:51:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:06,826 INFO L225 Difference]: With dead ends: 130 [2022-01-10 02:51:06,826 INFO L226 Difference]: Without dead ends: 90 [2022-01-10 02:51:06,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-01-10 02:51:06,828 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:06,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 544 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:51:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-10 02:51:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-01-10 02:51:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:06,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2022-01-10 02:51:06,836 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 53 [2022-01-10 02:51:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:06,837 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2022-01-10 02:51:06,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 02:51:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2022-01-10 02:51:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 02:51:06,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:06,838 INFO L514 BasicCegarLoop]: trace histogram [22, 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] [2022-01-10 02:51:06,853 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 02:51:07,051 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 02:51:07,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash 332525909, now seen corresponding path program 4 times [2022-01-10 02:51:07,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:07,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665624849] [2022-01-10 02:51:07,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 02:51:07,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:07,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:07,054 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 02:51:07,055 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 02:51:07,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 02:51:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 02:51:07,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 146 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 02:51:07,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-10 02:51:08,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665624849] [2022-01-10 02:51:08,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665624849] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:08,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:08,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-10 02:51:08,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201396306] [2022-01-10 02:51:08,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:08,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 02:51:08,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 02:51:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2022-01-10 02:51:08,352 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:10,827 INFO L93 Difference]: Finished difference Result 169 states and 220 transitions. [2022-01-10 02:51:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 02:51:10,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-01-10 02:51:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:10,829 INFO L225 Difference]: With dead ends: 169 [2022-01-10 02:51:10,829 INFO L226 Difference]: Without dead ends: 102 [2022-01-10 02:51:10,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=755, Invalid=1501, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 02:51:10,831 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 81 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:10,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1333 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:51:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-10 02:51:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-01-10 02:51:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-01-10 02:51:10,842 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 60 [2022-01-10 02:51:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:10,842 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-01-10 02:51:10,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-01-10 02:51:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 02:51:10,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:10,843 INFO L514 BasicCegarLoop]: trace histogram [34, 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] [2022-01-10 02:51:10,855 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 02:51:11,047 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 02:51:11,048 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 954881365, now seen corresponding path program 5 times [2022-01-10 02:51:11,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:11,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213287906] [2022-01-10 02:51:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 02:51:11,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:11,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:11,050 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 02:51:11,051 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 02:51:11,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-10 02:51:11,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:11,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-10 02:51:11,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 302 proven. 253 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 02:51:12,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:14,169 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 0 proven. 554 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-10 02:51:14,169 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:14,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213287906] [2022-01-10 02:51:14,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213287906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:14,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:14,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-10 02:51:14,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190327952] [2022-01-10 02:51:14,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:14,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-10 02:51:14,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:14,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-10 02:51:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1868, Unknown=0, NotChecked=0, Total=2450 [2022-01-10 02:51:14,173 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:18,052 INFO L93 Difference]: Finished difference Result 212 states and 283 transitions. [2022-01-10 02:51:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-10 02:51:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2022-01-10 02:51:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:18,054 INFO L225 Difference]: With dead ends: 212 [2022-01-10 02:51:18,055 INFO L226 Difference]: Without dead ends: 123 [2022-01-10 02:51:18,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2082, Invalid=6290, Unknown=0, NotChecked=0, Total=8372 [2022-01-10 02:51:18,058 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 121 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:18,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 2131 Invalid, 1728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 02:51:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-10 02:51:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-01-10 02:51:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2022-01-10 02:51:18,071 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 72 [2022-01-10 02:51:18,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:18,072 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2022-01-10 02:51:18,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-10 02:51:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2022-01-10 02:51:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 02:51:18,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:18,073 INFO L514 BasicCegarLoop]: trace histogram [55, 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] [2022-01-10 02:51:18,091 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 02:51:18,286 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 02:51:18,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:18,287 INFO L85 PathProgramCache]: Analyzing trace with hash -121364119, now seen corresponding path program 6 times [2022-01-10 02:51:18,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:18,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231684527] [2022-01-10 02:51:18,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 02:51:18,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:18,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:18,289 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 02:51:18,291 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 02:51:21,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-01-10 02:51:21,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 02:51:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 02:51:21,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 794 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-10 02:51:22,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 794 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-10 02:51:25,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:25,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231684527] [2022-01-10 02:51:25,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231684527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:25,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:25,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-01-10 02:51:25,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695630810] [2022-01-10 02:51:25,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:25,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-10 02:51:25,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-10 02:51:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1926, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 02:51:25,541 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 52 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 52 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 02:51:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:51:47,534 INFO L93 Difference]: Finished difference Result 206 states and 264 transitions. [2022-01-10 02:51:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-10 02:51:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 52 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 93 [2022-01-10 02:51:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:51:47,537 INFO L225 Difference]: With dead ends: 206 [2022-01-10 02:51:47,537 INFO L226 Difference]: Without dead ends: 148 [2022-01-10 02:51:47,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=3276, Invalid=6824, Unknown=0, NotChecked=0, Total=10100 [2022-01-10 02:51:47,539 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 407 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:51:47,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 2006 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 02:51:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-10 02:51:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-01-10 02:51:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 136 states have internal predecessors, (154), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-10 02:51:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 170 transitions. [2022-01-10 02:51:47,552 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 170 transitions. Word has length 93 [2022-01-10 02:51:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:51:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 170 transitions. [2022-01-10 02:51:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 52 states have internal predecessors, (83), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-10 02:51:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 170 transitions. [2022-01-10 02:51:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-10 02:51:47,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:51:47,554 INFO L514 BasicCegarLoop]: trace histogram [80, 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] [2022-01-10 02:51:47,574 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 02:51:47,767 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 02:51:47,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:51:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:51:47,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1119207339, now seen corresponding path program 7 times [2022-01-10 02:51:47,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 02:51:47,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744111956] [2022-01-10 02:51:47,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 02:51:47,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 02:51:47,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 02:51:47,770 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 02:51:47,771 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 02:51:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:51:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-10 02:51:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:51:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 1619 proven. 1176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-10 02:51:50,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:51:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 1619 proven. 1176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-01-10 02:51:58,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 02:51:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744111956] [2022-01-10 02:51:58,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744111956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:51:58,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:51:58,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2022-01-10 02:51:58,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301227187] [2022-01-10 02:51:58,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 02:51:58,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-10 02:51:58,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 02:51:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-10 02:51:58,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2548, Invalid=7754, Unknown=0, NotChecked=0, Total=10302 [2022-01-10 02:51:58,978 INFO L87 Difference]: Start difference. First operand 148 states and 170 transitions. Second operand has 102 states, 102 states have (on average 1.303921568627451) internal successors, (133), 102 states have internal predecessors, (133), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)