/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:19:00,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:19:00,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:19:00,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 22:19:00,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 22:19:00,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 22:19:00,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 22:19:00,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 22:19:00,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 22:19:00,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 22:19:00,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 22:19:00,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 22:19:00,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 22:19:00,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 22:19:00,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 22:19:00,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 22:19:00,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 22:19:00,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 22:19:00,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 22:19:00,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 22:19:00,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 22:19:00,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 22:19:00,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 22:19:00,313 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 22:19:00,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 22:19:00,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:19:00,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:19:00,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:19:00,330 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 22:19:00,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:19:00,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:19:00,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:19:00,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:19:00,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:19:00,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:19:00,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:19:00,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:19:00,366 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:19:00,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:19:00,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:19:00,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:19:00,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:19:00,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:19:00,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:19:00,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:19:00,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:19:00,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:19:00,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:19:00,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:19:00,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:19:00,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:19:00,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:19:00,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:19:00,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:19:00,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:19:00,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:19:00,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:19:00,371 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:19:00,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:19:00,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:19:00,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:19:00,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:19:00,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:19:00,589 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:19:00,589 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:19:00,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2022-01-09 22:19:00,643 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc0e0b33/dc3c4b8c23464a6faa1ec4baf0822614/FLAGa10fd91fd [2022-01-09 22:19:00,985 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:19:00,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2022-01-09 22:19:00,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc0e0b33/dc3c4b8c23464a6faa1ec4baf0822614/FLAGa10fd91fd [2022-01-09 22:19:01,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc0e0b33/dc3c4b8c23464a6faa1ec4baf0822614 [2022-01-09 22:19:01,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:19:01,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:19:01,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:19:01,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:19:01,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:19:01,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aeee36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01, skipping insertion in model container [2022-01-09 22:19:01,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:19:01,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:19:01,544 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/eureka_01-2.c[323,336] [2022-01-09 22:19:01,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:19:01,602 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:19:01,610 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/eureka_01-2.c[323,336] [2022-01-09 22:19:01,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:19:01,637 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:19:01,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01 WrapperNode [2022-01-09 22:19:01,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:19:01,639 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:19:01,639 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:19:01,639 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:19:01,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,683 INFO L137 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 199 [2022-01-09 22:19:01,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:19:01,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:19:01,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:19:01,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:19:01,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:19:01,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:19:01,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:19:01,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:19:01,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (1/1) ... [2022-01-09 22:19:01,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:19:01,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:01,738 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 22:19:01,764 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 22:19:01,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:19:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:19:01,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 22:19:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 22:19:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:19:01,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:19:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 22:19:01,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 22:19:01,843 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:19:01,844 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:19:01,992 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:19:01,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:19:01,997 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-09 22:19:01,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:19:01 BoogieIcfgContainer [2022-01-09 22:19:01,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:19:02,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:19:02,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:19:02,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:19:02,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:19:01" (1/3) ... [2022-01-09 22:19:02,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e84c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:19:02, skipping insertion in model container [2022-01-09 22:19:02,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:19:01" (2/3) ... [2022-01-09 22:19:02,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e84c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:19:02, skipping insertion in model container [2022-01-09 22:19:02,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:19:01" (3/3) ... [2022-01-09 22:19:02,005 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2022-01-09 22:19:02,009 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:19:02,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:19:02,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:19:02,049 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 22:19:02,049 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:19:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 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 22:19:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:19:02,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:02,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:02,077 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:02,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:02,081 INFO L85 PathProgramCache]: Analyzing trace with hash 678614248, now seen corresponding path program 1 times [2022-01-09 22:19:02,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:02,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744860219] [2022-01-09 22:19:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:02,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:02,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:02,301 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 22:19:02,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:02,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744860219] [2022-01-09 22:19:02,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744860219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:02,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:19:02,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:19:02,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693480888] [2022-01-09 22:19:02,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:02,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:19:02,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:19:02,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:19:02,340 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 22:19:02,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:02,357 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-01-09 22:19:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:19:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 22:19:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:02,366 INFO L225 Difference]: With dead ends: 47 [2022-01-09 22:19:02,366 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 22:19:02,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:19:02,373 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:02,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 22:19:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-09 22:19:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 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 22:19:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-09 22:19:02,403 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2022-01-09 22:19:02,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:02,404 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-09 22:19:02,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 22:19:02,404 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-09 22:19:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-09 22:19:02,405 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:02,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:02,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:19:02,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:02,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 137869947, now seen corresponding path program 1 times [2022-01-09 22:19:02,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:02,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991115007] [2022-01-09 22:19:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:02,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:19:02,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:02,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991115007] [2022-01-09 22:19:02,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991115007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:02,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:19:02,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:19:02,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722295434] [2022-01-09 22:19:02,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:02,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:19:02,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:02,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:19:02,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:19:02,531 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 22:19:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:02,560 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-01-09 22:19:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:19:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 22:19:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:02,562 INFO L225 Difference]: With dead ends: 42 [2022-01-09 22:19:02,562 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 22:19:02,562 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 22:19:02,564 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:02,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:02,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 22:19:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-09 22:19:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 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 22:19:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-09 22:19:02,569 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2022-01-09 22:19:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:02,569 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-09 22:19:02,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 22:19:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-09 22:19:02,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 22:19:02,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:02,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:02,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:19:02,571 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:02,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1682093747, now seen corresponding path program 1 times [2022-01-09 22:19:02,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:02,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532341827] [2022-01-09 22:19:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:02,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:19:02,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532341827] [2022-01-09 22:19:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532341827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:02,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:19:02,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:19:02,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414234746] [2022-01-09 22:19:02,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:02,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:19:02,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:19:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:19:02,678 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 22:19:02,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:02,750 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-01-09 22:19:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:19:02,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-01-09 22:19:02,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:02,752 INFO L225 Difference]: With dead ends: 51 [2022-01-09 22:19:02,752 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 22:19:02,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:19:02,754 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:02,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 22:19:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2022-01-09 22:19:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-01-09 22:19:02,759 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 14 [2022-01-09 22:19:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:02,760 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-01-09 22:19:02,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 22:19:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-01-09 22:19:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 22:19:02,765 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:02,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:02,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 22:19:02,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash 701151449, now seen corresponding path program 1 times [2022-01-09 22:19:02,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:02,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151730872] [2022-01-09 22:19:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:02,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:19:02,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151730872] [2022-01-09 22:19:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151730872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:02,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:19:02,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:19:02,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256854858] [2022-01-09 22:19:02,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:02,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:19:02,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:19:02,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:19:02,860 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 22:19:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:02,887 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-01-09 22:19:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:19:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 22:19:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:02,888 INFO L225 Difference]: With dead ends: 43 [2022-01-09 22:19:02,888 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 22:19:02,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:19:02,896 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:02,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 42 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:02,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 22:19:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-09 22:19:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 0 states have call successors, (0), 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 22:19:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-01-09 22:19:02,912 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2022-01-09 22:19:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:02,912 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-01-09 22:19:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 22:19:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-01-09 22:19:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 22:19:02,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:02,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:02,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 22:19:02,914 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash -792194438, now seen corresponding path program 1 times [2022-01-09 22:19:02,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:02,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506197023] [2022-01-09 22:19:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:02,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:03,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506197023] [2022-01-09 22:19:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506197023] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:03,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:19:03,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 22:19:03,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689034408] [2022-01-09 22:19:03,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:03,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:19:03,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:19:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:19:03,012 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 22:19:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:03,074 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-09 22:19:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:19:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2022-01-09 22:19:03,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:03,077 INFO L225 Difference]: With dead ends: 48 [2022-01-09 22:19:03,077 INFO L226 Difference]: Without dead ends: 41 [2022-01-09 22:19:03,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:19:03,080 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:03,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-09 22:19:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-01-09 22:19:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 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 22:19:03,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-01-09 22:19:03,084 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2022-01-09 22:19:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:03,085 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-01-09 22:19:03,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 22:19:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-01-09 22:19:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 22:19:03,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:03,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:03,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 22:19:03,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1624635408, now seen corresponding path program 1 times [2022-01-09 22:19:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305630063] [2022-01-09 22:19:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:03,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:03,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:03,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305630063] [2022-01-09 22:19:03,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305630063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:03,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237143078] [2022-01-09 22:19:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:03,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:03,160 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 22:19:03,161 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 22:19:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:19:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:19:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:03,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:19:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:03,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237143078] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:19:03,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:19:03,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-09 22:19:03,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534272179] [2022-01-09 22:19:03,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:19:03,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:19:03,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:19:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:19:03,453 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 22:19:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:03,494 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-01-09 22:19:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:19:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 23 [2022-01-09 22:19:03,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:03,495 INFO L225 Difference]: With dead ends: 55 [2022-01-09 22:19:03,495 INFO L226 Difference]: Without dead ends: 35 [2022-01-09 22:19:03,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:19:03,496 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:03,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-09 22:19:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-09 22:19:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-01-09 22:19:03,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2022-01-09 22:19:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:03,502 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-01-09 22:19:03,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 22:19:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-01-09 22:19:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-09 22:19:03,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:03,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:03,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:19:03,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-09 22:19:03,726 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:03,726 INFO L85 PathProgramCache]: Analyzing trace with hash 55827240, now seen corresponding path program 2 times [2022-01-09 22:19:03,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:03,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171304801] [2022-01-09 22:19:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:03,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 22:19:03,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171304801] [2022-01-09 22:19:03,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171304801] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:03,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807566966] [2022-01-09 22:19:03,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:19:03,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:03,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:03,796 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 22:19:03,797 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 22:19:03,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:19:03,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:19:03,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:19:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:19:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 22:19:03,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:19:03,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807566966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:19:03,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:19:03,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-01-09 22:19:03,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972170033] [2022-01-09 22:19:03,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:19:03,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:19:03,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:03,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:19:03,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:19:03,988 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 22:19:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:04,025 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2022-01-09 22:19:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:19:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 32 [2022-01-09 22:19:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:04,026 INFO L225 Difference]: With dead ends: 76 [2022-01-09 22:19:04,026 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 22:19:04,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:19:04,027 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:04,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 22:19:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2022-01-09 22:19:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-09 22:19:04,032 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 32 [2022-01-09 22:19:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:04,032 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-09 22:19:04,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 22:19:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-09 22:19:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-09 22:19:04,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:04,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:04,059 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 22:19:04,248 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,SelfDestructingSolverStorable6 [2022-01-09 22:19:04,249 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:04,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1789747366, now seen corresponding path program 1 times [2022-01-09 22:19:04,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:04,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057643319] [2022-01-09 22:19:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:04,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:04,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057643319] [2022-01-09 22:19:04,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057643319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:04,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521746627] [2022-01-09 22:19:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:04,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:04,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:04,331 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 22:19:04,348 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 22:19:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:19:04,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:19:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:04,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:19:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:19:04,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521746627] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:19:04,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:19:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-09 22:19:04,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505416621] [2022-01-09 22:19:04,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:19:04,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-09 22:19:04,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-09 22:19:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:19:04,643 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:04,698 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-01-09 22:19:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:19:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-01-09 22:19:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:04,699 INFO L225 Difference]: With dead ends: 60 [2022-01-09 22:19:04,699 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 22:19:04,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:19:04,700 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:04,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:04,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 22:19:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-01-09 22:19:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-01-09 22:19:04,711 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 32 [2022-01-09 22:19:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-01-09 22:19:04,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-01-09 22:19:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-09 22:19:04,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:04,717 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:04,740 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 22:19:04,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:04,932 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1014530160, now seen corresponding path program 2 times [2022-01-09 22:19:04,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:04,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825070342] [2022-01-09 22:19:04,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:04,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 22:19:04,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825070342] [2022-01-09 22:19:04,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825070342] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755509785] [2022-01-09 22:19:04,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:19:04,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:04,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:04,995 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 22:19:04,997 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 22:19:05,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:19:05,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:19:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:19:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:19:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 22:19:05,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:19:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 22:19:05,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755509785] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:19:05,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:19:05,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-09 22:19:05,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946895472] [2022-01-09 22:19:05,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:19:05,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:19:05,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:19:05,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:19:05,274 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:05,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:05,332 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2022-01-09 22:19:05,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:19:05,332 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-01-09 22:19:05,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:05,333 INFO L225 Difference]: With dead ends: 65 [2022-01-09 22:19:05,333 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 22:19:05,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:19:05,334 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:05,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 84 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:19:05,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 22:19:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-09 22:19:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 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 22:19:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-01-09 22:19:05,339 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 35 [2022-01-09 22:19:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:05,339 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-01-09 22:19:05,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-01-09 22:19:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 22:19:05,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:05,340 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:05,363 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 22:19:05,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:05,558 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1632294897, now seen corresponding path program 3 times [2022-01-09 22:19:05,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:05,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030191660] [2022-01-09 22:19:05,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:05,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-09 22:19:05,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:05,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030191660] [2022-01-09 22:19:05,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030191660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:05,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746548722] [2022-01-09 22:19:05,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:19:05,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:05,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:05,657 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 22:19:05,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:19:05,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 22:19:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:19:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:19:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:19:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 22:19:05,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:19:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-09 22:19:06,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746548722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:19:06,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:19:06,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-01-09 22:19:06,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386116526] [2022-01-09 22:19:06,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:19:06,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 22:19:06,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:06,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 22:19:06,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-09 22:19:06,008 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:06,485 INFO L93 Difference]: Finished difference Result 171 states and 220 transitions. [2022-01-09 22:19:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-09 22:19:06,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-01-09 22:19:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:06,487 INFO L225 Difference]: With dead ends: 171 [2022-01-09 22:19:06,487 INFO L226 Difference]: Without dead ends: 144 [2022-01-09 22:19:06,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=980, Unknown=0, NotChecked=0, Total=1482 [2022-01-09 22:19:06,488 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 509 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:06,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 58 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:19:06,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-09 22:19:06,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2022-01-09 22:19:06,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.2735849056603774) internal successors, (135), 106 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:06,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2022-01-09 22:19:06,502 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 44 [2022-01-09 22:19:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:06,502 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2022-01-09 22:19:06,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:19:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2022-01-09 22:19:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-09 22:19:06,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:06,503 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:06,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:19:06,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 22:19:06,720 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:06,720 INFO L85 PathProgramCache]: Analyzing trace with hash -919071665, now seen corresponding path program 4 times [2022-01-09 22:19:06,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:06,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320343505] [2022-01-09 22:19:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:06,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2022-01-09 22:19:06,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320343505] [2022-01-09 22:19:06,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320343505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:06,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095876643] [2022-01-09 22:19:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:19:06,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:06,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:19:06,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:19:07,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:19:07,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:19:07,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-09 22:19:07,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:19:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-01-09 22:19:07,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:19:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 26 proven. 228 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-01-09 22:19:07,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095876643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:19:07,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:19:07,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-01-09 22:19:07,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869379402] [2022-01-09 22:19:07,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:19:07,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-09 22:19:07,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:19:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-09 22:19:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-01-09 22:19:07,505 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 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 22:19:08,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:19:08,595 INFO L93 Difference]: Finished difference Result 322 states and 416 transitions. [2022-01-09 22:19:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-09 22:19:08,595 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 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 104 [2022-01-09 22:19:08,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:19:08,596 INFO L225 Difference]: With dead ends: 322 [2022-01-09 22:19:08,596 INFO L226 Difference]: Without dead ends: 251 [2022-01-09 22:19:08,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1347, Invalid=4659, Unknown=0, NotChecked=0, Total=6006 [2022-01-09 22:19:08,600 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1114 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:19:08,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 114 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:19:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-09 22:19:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 131. [2022-01-09 22:19:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 0 states have call successors, (0), 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 22:19:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2022-01-09 22:19:08,635 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 104 [2022-01-09 22:19:08,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:19:08,635 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2022-01-09 22:19:08,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.166666666666667) internal successors, (100), 24 states have internal predecessors, (100), 0 states have call successors, (0), 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 22:19:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2022-01-09 22:19:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-09 22:19:08,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:19:08,639 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 6, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:19:08,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:19:08,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:08,852 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:19:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:19:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 964759091, now seen corresponding path program 5 times [2022-01-09 22:19:08,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:19:08,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584229922] [2022-01-09 22:19:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:19:08,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:19:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:19:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1032 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2022-01-09 22:19:08,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:19:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584229922] [2022-01-09 22:19:08,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584229922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:19:08,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418337414] [2022-01-09 22:19:08,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:19:08,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:19:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:19:08,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:19:08,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process