/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_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:56:58,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:56:58,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:56:59,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 22:56:59,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 22:56:59,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 22:56:59,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 22:56:59,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 22:56:59,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 22:56:59,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 22:56:59,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 22:56:59,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 22:56:59,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 22:56:59,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 22:56:59,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 22:56:59,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 22:56:59,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 22:56:59,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 22:56:59,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 22:56:59,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 22:56:59,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 22:56:59,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 22:56:59,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 22:56:59,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 22:56:59,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 22:56:59,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:56:59,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:56:59,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:56:59,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:56:59,059 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:56:59,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:56:59,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:56:59,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:56:59,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:56:59,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:56:59,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:56:59,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:56:59,067 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:56:59,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:56:59,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:56:59,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:56:59,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:56:59,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:56:59,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:56:59,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:56:59,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:56:59,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:56:59,279 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:56:59,281 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:56:59,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2022-01-09 22:56:59,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871dce94c/df500f339e1648068edd2aa51c4d679a/FLAG5496d6647 [2022-01-09 22:56:59,699 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:56:59,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-1.i [2022-01-09 22:56:59,707 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871dce94c/df500f339e1648068edd2aa51c4d679a/FLAG5496d6647 [2022-01-09 22:57:00,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871dce94c/df500f339e1648068edd2aa51c4d679a [2022-01-09 22:57:00,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:57:00,127 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:57:00,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:57:00,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:57:00,131 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:57:00,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3066a1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00, skipping insertion in model container [2022-01-09 22:57:00,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:57:00,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:57:00,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-1.i[816,829] [2022-01-09 22:57:00,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:57:00,286 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:57:00,299 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init2_ground-1.i[816,829] [2022-01-09 22:57:00,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:57:00,314 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:57:00,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00 WrapperNode [2022-01-09 22:57:00,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:57:00,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:57:00,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:57:00,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:57:00,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,336 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2022-01-09 22:57:00,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:57:00,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:57:00,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:57:00,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:57:00,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:57:00,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:57:00,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:57:00,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:57:00,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (1/1) ... [2022-01-09 22:57:00,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:57:00,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:57:00,407 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) [2022-01-09 22:57:00,409 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 [2022-01-09 22:57:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:57:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:57:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 22:57:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 22:57:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:57:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:57:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 22:57:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 22:57:00,505 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:57:00,506 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:57:00,635 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:57:00,639 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:57:00,639 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 22:57:00,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:57:00 BoogieIcfgContainer [2022-01-09 22:57:00,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:57:00,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:57:00,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:57:00,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:57:00,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:57:00" (1/3) ... [2022-01-09 22:57:00,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1c84dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:57:00, skipping insertion in model container [2022-01-09 22:57:00,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:57:00" (2/3) ... [2022-01-09 22:57:00,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d1c84dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:57:00, skipping insertion in model container [2022-01-09 22:57:00,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:57:00" (3/3) ... [2022-01-09 22:57:00,654 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-1.i [2022-01-09 22:57:00,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:57:00,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:57:00,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:57:00,727 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 [2022-01-09 22:57:00,727 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:57:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 22:57:00,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:57:00,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:57:00,762 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:57:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:57:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1157636873, now seen corresponding path program 1 times [2022-01-09 22:57:00,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:57:00,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358784562] [2022-01-09 22:57:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:00,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:57:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:57:00,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:57:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358784562] [2022-01-09 22:57:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358784562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:57:00,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:57:00,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:57:00,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985482476] [2022-01-09 22:57:00,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:57:00,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:57:00,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:57:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:57:00,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:57:00,970 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:57:00,996 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-01-09 22:57:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:57:00,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-09 22:57:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:57:01,004 INFO L225 Difference]: With dead ends: 31 [2022-01-09 22:57:01,005 INFO L226 Difference]: Without dead ends: 14 [2022-01-09 22:57:01,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:57:01,011 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:57:01,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:57:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-09 22:57:01,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-09 22:57:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-09 22:57:01,037 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-01-09 22:57:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:57:01,037 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-09 22:57:01,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-09 22:57:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:57:01,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:57:01,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:57:01,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:57:01,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:57:01,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:57:01,043 INFO L85 PathProgramCache]: Analyzing trace with hash 970257334, now seen corresponding path program 1 times [2022-01-09 22:57:01,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:57:01,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001449012] [2022-01-09 22:57:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:01,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:57:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:57:01,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:57:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001449012] [2022-01-09 22:57:01,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001449012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:57:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588781520] [2022-01-09 22:57:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:01,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:01,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:57:01,119 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:57:01,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:57:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 22:57:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:57:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:57:01,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:57:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:57:01,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588781520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:57:01,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:57:01,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-09 22:57:01,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572763952] [2022-01-09 22:57:01,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:57:01,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:57:01,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:57:01,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:57:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:57:01,304 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:57:01,344 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-01-09 22:57:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:57:01,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-09 22:57:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:57:01,346 INFO L225 Difference]: With dead ends: 30 [2022-01-09 22:57:01,346 INFO L226 Difference]: Without dead ends: 20 [2022-01-09 22:57:01,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:57:01,347 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:57:01,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:57:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-09 22:57:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-09 22:57:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-09 22:57:01,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2022-01-09 22:57:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:57:01,359 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-09 22:57:01,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-09 22:57:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 22:57:01,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:57:01,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:57:01,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 22:57:01,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:01,580 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:57:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:57:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash -57021897, now seen corresponding path program 2 times [2022-01-09 22:57:01,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:57:01,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659301014] [2022-01-09 22:57:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:01,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:57:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 22:57:01,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:57:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659301014] [2022-01-09 22:57:01,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659301014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:57:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702273567] [2022-01-09 22:57:01,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:57:01,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:01,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:57:01,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:57:01,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:57:01,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:57:01,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:57:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 22:57:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:57:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 22:57:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:57:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 22:57:01,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702273567] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:57:01,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:57:01,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-09 22:57:01,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759981101] [2022-01-09 22:57:01,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:57:01,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-09 22:57:01,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:57:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-09 22:57:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:57:01,830 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:57:01,882 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-01-09 22:57:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-09 22:57:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 22:57:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:57:01,884 INFO L225 Difference]: With dead ends: 45 [2022-01-09 22:57:01,884 INFO L226 Difference]: Without dead ends: 32 [2022-01-09 22:57:01,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:57:01,887 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:57:01,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:57:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-09 22:57:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-09 22:57:01,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-09 22:57:01,896 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2022-01-09 22:57:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:57:01,896 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-09 22:57:01,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:01,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-09 22:57:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 22:57:01,898 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:57:01,898 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:57:01,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:57:02,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-09 22:57:02,115 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:57:02,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:57:02,116 INFO L85 PathProgramCache]: Analyzing trace with hash 163359255, now seen corresponding path program 3 times [2022-01-09 22:57:02,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:57:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222267276] [2022-01-09 22:57:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:02,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:57:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-09 22:57:02,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:57:02,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222267276] [2022-01-09 22:57:02,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222267276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:57:02,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108816517] [2022-01-09 22:57:02,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:57:02,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:57:02,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:57:02,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:57:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-09 22:57:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:57:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 22:57:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:57:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-09 22:57:02,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:57:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-01-09 22:57:02,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108816517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:57:02,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:57:02,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-01-09 22:57:02,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047813275] [2022-01-09 22:57:02,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:57:02,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-09 22:57:02,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:57:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-09 22:57:02,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 22:57:02,654 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:57:02,743 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2022-01-09 22:57:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 22:57:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-09 22:57:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:57:02,745 INFO L225 Difference]: With dead ends: 75 [2022-01-09 22:57:02,745 INFO L226 Difference]: Without dead ends: 56 [2022-01-09 22:57:02,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 22:57:02,746 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:57:02,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:57:02,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-09 22:57:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-09 22:57:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:02,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-01-09 22:57:02,750 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 29 [2022-01-09 22:57:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:57:02,751 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-01-09 22:57:02,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:02,751 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-01-09 22:57:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-09 22:57:02,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:57:02,752 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:57:02,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:57:02,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:02,953 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:57:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:57:02,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1745445335, now seen corresponding path program 4 times [2022-01-09 22:57:02,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:57:02,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339700564] [2022-01-09 22:57:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:02,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:57:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-09 22:57:03,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:57:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339700564] [2022-01-09 22:57:03,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339700564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:57:03,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960730209] [2022-01-09 22:57:03,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:57:03,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:57:03,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:57:03,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:57:03,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:57:03,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:57:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-09 22:57:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:57:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-09 22:57:03,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:57:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-09 22:57:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960730209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:57:04,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:57:04,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-01-09 22:57:04,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326095259] [2022-01-09 22:57:04,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:57:04,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-09 22:57:04,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:57:04,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-09 22:57:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-01-09 22:57:04,114 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:57:04,285 INFO L93 Difference]: Finished difference Result 135 states and 186 transitions. [2022-01-09 22:57:04,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-09 22:57:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-01-09 22:57:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:57:04,286 INFO L225 Difference]: With dead ends: 135 [2022-01-09 22:57:04,286 INFO L226 Difference]: Without dead ends: 104 [2022-01-09 22:57:04,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-01-09 22:57:04,288 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:57:04,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:57:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-09 22:57:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-09 22:57:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.029126213592233) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-01-09 22:57:04,296 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 53 [2022-01-09 22:57:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:57:04,296 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-01-09 22:57:04,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:57:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-01-09 22:57:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-09 22:57:04,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:57:04,298 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:57:04,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:57:04,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:04,516 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:57:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:57:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1914155351, now seen corresponding path program 5 times [2022-01-09 22:57:04,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:57:04,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955753790] [2022-01-09 22:57:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:57:04,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:57:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:57:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-01-09 22:57:05,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:57:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955753790] [2022-01-09 22:57:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955753790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:57:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83741853] [2022-01-09 22:57:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:57:05,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:57:05,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:57:05,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:57:05,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process