/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/rewnifrev.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:06:58,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:06:58,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:06:58,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:06:58,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:06:58,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:06:58,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:06:58,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:06:58,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:06:58,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:06:58,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:06:58,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:06:58,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:06:58,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:06:58,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:06:58,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:06:58,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:06:58,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:06:58,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:06:58,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:06:58,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:06:58,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:06:58,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:06:58,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:06:58,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:06:58,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:06:58,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:06:58,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:06:58,487 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 23:06:58,507 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:06:58,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:06:58,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:06:58,508 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:06:58,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:06:58,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:06:58,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:06:58,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:06:58,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:06:58,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:06:58,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:06:58,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:06:58,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:06:58,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:06:58,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:06:58,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:06:58,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:06:58,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:06:58,511 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:06:58,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:06:58,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:06:58,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:06:58,724 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:06:58,725 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:06:58,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rewnifrev.c [2022-01-09 23:06:58,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb33d2fc7/e87a2869a1e24a919ff6b56f7ff2ecf8/FLAGf31c62768 [2022-01-09 23:06:59,098 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:06:59,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnifrev.c [2022-01-09 23:06:59,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb33d2fc7/e87a2869a1e24a919ff6b56f7ff2ecf8/FLAGf31c62768 [2022-01-09 23:06:59,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb33d2fc7/e87a2869a1e24a919ff6b56f7ff2ecf8 [2022-01-09 23:06:59,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:06:59,121 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:06:59,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:06:59,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:06:59,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:06:59,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443cd50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59, skipping insertion in model container [2022-01-09 23:06:59,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,129 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:06:59,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:06:59,247 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnifrev.c[400,413] [2022-01-09 23:06:59,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:06:59,292 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:06:59,303 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rewnifrev.c[400,413] [2022-01-09 23:06:59,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:06:59,315 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:06:59,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59 WrapperNode [2022-01-09 23:06:59,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:06:59,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:06:59,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:06:59,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:06:59,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,337 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-01-09 23:06:59,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:06:59,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:06:59,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:06:59,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:06:59,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:06:59,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:06:59,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:06:59,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:06:59,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (1/1) ... [2022-01-09 23:06:59,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:06:59,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:59,392 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 23:06:59,408 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 23:06:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:06:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:06:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:06:59,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 23:06:59,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:06:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:06:59,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:06:59,464 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:06:59,465 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:06:59,561 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:06:59,566 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:06:59,567 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 23:06:59,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:06:59 BoogieIcfgContainer [2022-01-09 23:06:59,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:06:59,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:06:59,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:06:59,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:06:59,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:06:59" (1/3) ... [2022-01-09 23:06:59,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6156a28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:06:59, skipping insertion in model container [2022-01-09 23:06:59,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:59" (2/3) ... [2022-01-09 23:06:59,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6156a28f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:06:59, skipping insertion in model container [2022-01-09 23:06:59,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:06:59" (3/3) ... [2022-01-09 23:06:59,584 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2022-01-09 23:06:59,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:06:59,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:06:59,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:06:59,642 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 23:06:59,642 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:06:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 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 23:06:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 23:06:59,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:59,668 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:59,669 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:59,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:59,673 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-01-09 23:06:59,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:59,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702783515] [2022-01-09 23:06:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:59,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:59,811 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 23:06:59,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:59,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702783515] [2022-01-09 23:06:59,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702783515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:59,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:59,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:06:59,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724665788] [2022-01-09 23:06:59,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:59,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:06:59,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:06:59,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:06:59,844 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 23:06:59,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:59,856 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-01-09 23:06:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:06:59,859 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-01-09 23:06:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:59,863 INFO L225 Difference]: With dead ends: 29 [2022-01-09 23:06:59,864 INFO L226 Difference]: Without dead ends: 14 [2022-01-09 23:06:59,866 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 23:06:59,869 INFO L933 BasicCegarLoop]: 21 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, 21 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 23:06:59,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-09 23:06:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-09 23:06:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-09 23:06:59,894 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-01-09 23:06:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:59,894 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-09 23:06:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 23:06:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-09 23:06:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 23:06:59,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:59,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:59,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:06:59,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:59,899 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-01-09 23:06:59,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:59,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313049472] [2022-01-09 23:06:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:59,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:59,974 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 23:06:59,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313049472] [2022-01-09 23:06:59,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313049472] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:59,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:59,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:06:59,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114166004] [2022-01-09 23:06:59,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:59,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:06:59,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:06:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:06:59,976 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 23:07:00,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:00,012 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-09 23:07:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:07:00,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-01-09 23:07:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:00,013 INFO L225 Difference]: With dead ends: 29 [2022-01-09 23:07:00,013 INFO L226 Difference]: Without dead ends: 18 [2022-01-09 23:07:00,014 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 23:07:00,014 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:00,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:07:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-09 23:07:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-01-09 23:07:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 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 23:07:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-01-09 23:07:00,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-01-09 23:07:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:00,018 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-01-09 23:07:00,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 23:07:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-01-09 23:07:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:07:00,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:00,019 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:00,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:07:00,019 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:00,020 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-01-09 23:07:00,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:00,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510801588] [2022-01-09 23:07:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:00,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:00,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510801588] [2022-01-09 23:07:00,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510801588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:07:00,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:07:00,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:07:00,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258872466] [2022-01-09 23:07:00,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:07:00,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:07:00,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:07:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:07:00,053 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 23:07:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:00,089 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-09 23:07:00,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:07:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-09 23:07:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:00,090 INFO L225 Difference]: With dead ends: 32 [2022-01-09 23:07:00,090 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 23:07:00,091 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 23:07:00,091 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:00,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:07:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 23:07:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-01-09 23:07:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 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 23:07:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-09 23:07:00,095 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-01-09 23:07:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:00,095 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-09 23:07:00,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 23:07:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-09 23:07:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-09 23:07:00,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:00,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:00,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:07:00,096 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-01-09 23:07:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:00,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588631209] [2022-01-09 23:07:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:00,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:07:00,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588631209] [2022-01-09 23:07:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588631209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:07:00,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:07:00,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-09 23:07:00,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963753961] [2022-01-09 23:07:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:07:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:07:00,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:07:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:07:00,297 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:00,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:00,397 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-09 23:07:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:07:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-09 23:07:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:00,398 INFO L225 Difference]: With dead ends: 27 [2022-01-09 23:07:00,398 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 23:07:00,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:07:00,400 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:00,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:07:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 23:07:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-01-09 23:07:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 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 23:07:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-09 23:07:00,405 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-01-09 23:07:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:00,405 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-09 23:07:00,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-09 23:07:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:07:00,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:00,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:00,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-09 23:07:00,406 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-01-09 23:07:00,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:00,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575785974] [2022-01-09 23:07:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:00,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:00,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:00,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575785974] [2022-01-09 23:07:00,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575785974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:00,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138763081] [2022-01-09 23:07:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:00,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:00,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:00,581 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 23:07:00,582 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 23:07:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:07:00,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:00,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:07:00,859 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-09 23:07:00,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-09 23:07:00,985 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-09 23:07:00,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-01-09 23:07:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:01,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:03,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-01-09 23:07:03,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-01-09 23:07:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138763081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:03,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:03,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-01-09 23:07:03,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553835429] [2022-01-09 23:07:03,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:03,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 23:07:03,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 23:07:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=324, Unknown=1, NotChecked=0, Total=420 [2022-01-09 23:07:03,259 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 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 23:07:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:03,452 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-09 23:07:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 23:07:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 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 23:07:03,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:03,455 INFO L225 Difference]: With dead ends: 32 [2022-01-09 23:07:03,457 INFO L226 Difference]: Without dead ends: 30 [2022-01-09 23:07:03,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=196, Invalid=615, Unknown=1, NotChecked=0, Total=812 [2022-01-09 23:07:03,468 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:03,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-01-09 23:07:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-09 23:07:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-01-09 23:07:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 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 23:07:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-09 23:07:03,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-01-09 23:07:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:03,478 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-09 23:07:03,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 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 23:07:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-09 23:07:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 23:07:03,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:03,479 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:03,497 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 23:07:03,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:03,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:03,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-01-09 23:07:03,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:03,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885243307] [2022-01-09 23:07:03,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:03,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:03,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885243307] [2022-01-09 23:07:03,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885243307] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817549024] [2022-01-09 23:07:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:07:03,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:03,760 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 23:07:03,778 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 23:07:03,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:07:03,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 23:07:03,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:03,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:03,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817549024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:03,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:03,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2022-01-09 23:07:03,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209185717] [2022-01-09 23:07:03,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:03,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 23:07:03,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:03,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 23:07:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:07:03,939 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 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 23:07:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:04,008 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-01-09 23:07:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:07:04,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2022-01-09 23:07:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:04,010 INFO L225 Difference]: With dead ends: 56 [2022-01-09 23:07:04,010 INFO L226 Difference]: Without dead ends: 31 [2022-01-09 23:07:04,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2022-01-09 23:07:04,014 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:04,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:07:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-09 23:07:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-09 23:07:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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 23:07:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-09 23:07:04,020 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-01-09 23:07:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:04,020 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-09 23:07:04,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 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 23:07:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-09 23:07:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:07:04,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:04,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:04,039 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 23:07:04,239 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,SelfDestructingSolverStorable5 [2022-01-09 23:07:04,239 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:04,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:04,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2022-01-09 23:07:04,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:04,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628747069] [2022-01-09 23:07:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:04,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:04,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628747069] [2022-01-09 23:07:04,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628747069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984394593] [2022-01-09 23:07:04,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:07:04,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:04,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:04,582 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 23:07:04,583 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 23:07:04,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-09 23:07:04,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-09 23:07:04,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:04,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:07:04,672 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:04,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:04,688 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:04,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:04,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:04,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-09 23:07:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:05,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:05,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-09 23:07:05,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-01-09 23:07:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984394593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:05,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:05,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-01-09 23:07:05,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161853127] [2022-01-09 23:07:05,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:05,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:07:05,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:07:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:07:05,332 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:05,861 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-01-09 23:07:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 23:07:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-09 23:07:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:05,862 INFO L225 Difference]: With dead ends: 42 [2022-01-09 23:07:05,862 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 23:07:05,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=2004, Unknown=0, NotChecked=0, Total=2550 [2022-01-09 23:07:05,864 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:05,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 172 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-01-09 23:07:05,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 23:07:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-01-09 23:07:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 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 23:07:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-01-09 23:07:05,868 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2022-01-09 23:07:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:05,868 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-01-09 23:07:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-01-09 23:07:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-09 23:07:05,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:05,869 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:05,889 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 23:07:06,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:06,089 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 4 times [2022-01-09 23:07:06,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:06,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049600359] [2022-01-09 23:07:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:06,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:06,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:06,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049600359] [2022-01-09 23:07:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049600359] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:06,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870384807] [2022-01-09 23:07:06,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:07:06,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:06,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:06,154 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 23:07:06,181 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 23:07:06,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:07:06,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 23:07:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:06,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:06,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870384807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:06,438 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:06,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 15 [2022-01-09 23:07:06,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424012223] [2022-01-09 23:07:06,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:06,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 23:07:06,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 23:07:06,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-01-09 23:07:06,439 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 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 23:07:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:06,505 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-01-09 23:07:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:07:06,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 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 23:07:06,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:06,506 INFO L225 Difference]: With dead ends: 68 [2022-01-09 23:07:06,506 INFO L226 Difference]: Without dead ends: 39 [2022-01-09 23:07:06,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2022-01-09 23:07:06,506 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:06,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:07:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-09 23:07:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-01-09 23:07:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 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 23:07:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-01-09 23:07:06,510 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-01-09 23:07:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:06,510 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-01-09 23:07:06,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 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 23:07:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-01-09 23:07:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-09 23:07:06,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:06,515 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:06,533 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 23:07:06,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:06,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:06,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:06,731 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 5 times [2022-01-09 23:07:06,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:06,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861915206] [2022-01-09 23:07:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:06,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:06,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:07,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861915206] [2022-01-09 23:07:07,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861915206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068450692] [2022-01-09 23:07:07,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:07:07,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:07,032 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 23:07:07,033 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 23:07:07,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-09 23:07:07,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-09 23:07:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:07,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:07:07,151 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:07,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:07,162 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:07,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:07,192 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:07,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:07,202 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:07,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:07,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:07,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:07:07,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:07:07,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:07:07,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-01-09 23:07:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:07,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:07,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-09 23:07:07,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-01-09 23:07:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:07,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068450692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:07,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:07,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-01-09 23:07:07,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321980733] [2022-01-09 23:07:07,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:07,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:07:07,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:07,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:07:07,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:07:07,821 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 23:07:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:08,155 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-01-09 23:07:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-09 23:07:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 36 [2022-01-09 23:07:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:08,156 INFO L225 Difference]: With dead ends: 49 [2022-01-09 23:07:08,156 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 23:07:08,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=516, Invalid=1740, Unknown=0, NotChecked=0, Total=2256 [2022-01-09 23:07:08,157 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:08,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 102 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-01-09 23:07:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 23:07:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-01-09 23:07:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 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 23:07:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-01-09 23:07:08,161 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2022-01-09 23:07:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:08,161 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-01-09 23:07:08,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 23:07:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-01-09 23:07:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-09 23:07:08,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:08,162 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:08,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-09 23:07:08,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:08,378 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 6 times [2022-01-09 23:07:08,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:08,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351432303] [2022-01-09 23:07:08,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:08,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:08,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351432303] [2022-01-09 23:07:08,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351432303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:08,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786875875] [2022-01-09 23:07:08,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:07:08,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:08,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:08,437 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 23:07:08,438 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 23:07:08,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-09 23:07:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:08,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 23:07:08,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:08,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:08,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786875875] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:08,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:08,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 18 [2022-01-09 23:07:08,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211470092] [2022-01-09 23:07:08,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:08,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 23:07:08,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 23:07:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-01-09 23:07:08,754 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:08,847 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-01-09 23:07:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 23:07:08,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-09 23:07:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:08,848 INFO L225 Difference]: With dead ends: 80 [2022-01-09 23:07:08,848 INFO L226 Difference]: Without dead ends: 47 [2022-01-09 23:07:08,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:07:08,849 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:08,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 64 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:07:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-09 23:07:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-01-09 23:07:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-01-09 23:07:08,853 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2022-01-09 23:07:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:08,853 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-01-09 23:07:08,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-01-09 23:07:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:07:08,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:08,854 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:08,873 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 23:07:09,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:09,070 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 7 times [2022-01-09 23:07:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337552024] [2022-01-09 23:07:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:09,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:09,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337552024] [2022-01-09 23:07:09,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337552024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554358594] [2022-01-09 23:07:09,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:07:09,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:09,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:09,368 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 23:07:09,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:07:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-09 23:07:09,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:09,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:07:09,448 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:09,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:09,461 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:09,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:09,479 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:09,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:09,491 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:09,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:09,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:09,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:09,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:09,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:09,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-09 23:07:09,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-09 23:07:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:09,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:20,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-01-09 23:07:20,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1658 treesize of output 1626 [2022-01-09 23:07:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:21,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554358594] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:21,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:21,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 36 [2022-01-09 23:07:21,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619623021] [2022-01-09 23:07:21,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:21,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-09 23:07:21,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-09 23:07:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1008, Unknown=5, NotChecked=0, Total=1260 [2022-01-09 23:07:21,193 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 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 23:07:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:54,848 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-01-09 23:07:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-09 23:07:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 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 23:07:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:54,850 INFO L225 Difference]: With dead ends: 77 [2022-01-09 23:07:54,850 INFO L226 Difference]: Without dead ends: 75 [2022-01-09 23:07:54,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=1044, Invalid=4055, Unknown=13, NotChecked=0, Total=5112 [2022-01-09 23:07:54,851 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:54,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 132 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 491 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-01-09 23:07:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-09 23:07:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2022-01-09 23:07:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-01-09 23:07:54,858 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2022-01-09 23:07:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:54,858 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-01-09 23:07:54,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0277777777777777) internal successors, (109), 36 states have internal predecessors, (109), 0 states have call successors, (0), 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 23:07:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-01-09 23:07:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-09 23:07:54,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:54,861 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:54,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:55,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:55,090 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:55,090 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 8 times [2022-01-09 23:07:55,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:55,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117584627] [2022-01-09 23:07:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:55,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:55,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117584627] [2022-01-09 23:07:55,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117584627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879973956] [2022-01-09 23:07:55,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:07:55,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:55,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:55,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:07:55,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:07:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 23:07:55,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:55,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:55,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879973956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:55,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:55,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2022-01-09 23:07:55,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707827522] [2022-01-09 23:07:55,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:55,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 23:07:55,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 23:07:55,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:07:55,563 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 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 23:07:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:55,655 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-01-09 23:07:55,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-09 23:07:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-01-09 23:07:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:55,656 INFO L225 Difference]: With dead ends: 92 [2022-01-09 23:07:55,656 INFO L226 Difference]: Without dead ends: 55 [2022-01-09 23:07:55,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-01-09 23:07:55,656 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:55,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 70 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:07:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-09 23:07:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-01-09 23:07:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 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 23:07:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-09 23:07:55,661 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2022-01-09 23:07:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:55,661 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-09 23:07:55,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 0 states have call successors, (0), 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 23:07:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-09 23:07:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-09 23:07:55,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:55,663 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:55,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:55,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:07:55,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 9 times [2022-01-09 23:07:55,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580377479] [2022-01-09 23:07:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:55,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 26 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:56,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:56,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580377479] [2022-01-09 23:07:56,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580377479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:56,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034787409] [2022-01-09 23:07:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:07:56,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:56,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:56,362 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:56,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:07:56,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-09 23:07:56,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-09 23:07:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:56,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:07:56,490 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:56,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:56,501 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:56,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:56,526 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:56,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:56,541 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:56,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:56,569 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:56,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:56,580 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:56,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:56,607 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:07:56,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:07:56,618 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:56,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:56,690 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:07:56,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:07:56,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-09 23:07:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:57,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:57,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034787409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:57,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:57,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 43 [2022-01-09 23:07:57,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497065168] [2022-01-09 23:07:57,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:57,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-09 23:07:57,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:57,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-09 23:07:57,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2022-01-09 23:07:57,588 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:58,824 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-01-09 23:07:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-09 23:07:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-01-09 23:07:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:58,825 INFO L225 Difference]: With dead ends: 75 [2022-01-09 23:07:58,825 INFO L226 Difference]: Without dead ends: 73 [2022-01-09 23:07:58,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 83 SyntacticMatches, 19 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2022-01-09 23:07:58,827 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 172 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:58,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 186 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 346 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-09 23:07:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-09 23:07:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2022-01-09 23:07:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 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 23:07:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-01-09 23:07:58,832 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2022-01-09 23:07:58,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:58,832 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-01-09 23:07:58,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:07:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-01-09 23:07:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 23:07:58,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:58,833 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:58,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:59,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 23:07:59,050 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 10 times [2022-01-09 23:07:59,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:59,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505437689] [2022-01-09 23:07:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:59,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:59,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:59,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505437689] [2022-01-09 23:07:59,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505437689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:59,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972115193] [2022-01-09 23:07:59,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:07:59,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:59,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:59,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:59,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:07:59,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:07:59,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 23:07:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:59,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:59,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972115193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:59,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:59,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2022-01-09 23:07:59,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122443368] [2022-01-09 23:07:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:59,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-09 23:07:59,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-09 23:07:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2022-01-09 23:07:59,561 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 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 23:07:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:59,695 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-01-09 23:07:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 23:07:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 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 56 [2022-01-09 23:07:59,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:59,696 INFO L225 Difference]: With dead ends: 104 [2022-01-09 23:07:59,696 INFO L226 Difference]: Without dead ends: 63 [2022-01-09 23:07:59,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:07:59,696 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:59,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 80 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:07:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-09 23:07:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-01-09 23:07:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 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 23:07:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-01-09 23:07:59,701 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-01-09 23:07:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:59,702 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-01-09 23:07:59,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 0 states have call successors, (0), 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 23:07:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-01-09 23:07:59,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-09 23:07:59,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:59,702 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:59,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:59,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 23:07:59,903 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:59,904 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 11 times [2022-01-09 23:07:59,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:59,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132166718] [2022-01-09 23:07:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:59,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:08:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:00,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:08:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132166718] [2022-01-09 23:08:00,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132166718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:08:00,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411777771] [2022-01-09 23:08:00,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:08:00,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:08:00,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:08:00,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:08:00,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:08:00,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-09 23:08:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:08:00,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-09 23:08:00,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:08:00,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:08:00,362 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:00,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:00,374 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:00,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:00,412 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:00,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:00,425 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:00,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:00,462 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:00,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:00,475 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:00,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:00,511 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:00,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:00,524 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:00,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:00,560 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:00,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:00,576 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:00,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:00,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:08:00,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:01,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-09 23:08:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:01,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:08:01,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:08:01,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:08:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:01,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411777771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:08:01,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:08:01,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 42 [2022-01-09 23:08:01,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863570595] [2022-01-09 23:08:01,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:08:01,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-09 23:08:01,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:08:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-09 23:08:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-01-09 23:08:01,971 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 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 23:08:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:08:03,267 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2022-01-09 23:08:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-09 23:08:03,268 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 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 60 [2022-01-09 23:08:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:08:03,268 INFO L225 Difference]: With dead ends: 79 [2022-01-09 23:08:03,268 INFO L226 Difference]: Without dead ends: 77 [2022-01-09 23:08:03,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 104 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1124, Invalid=4576, Unknown=0, NotChecked=0, Total=5700 [2022-01-09 23:08:03,270 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 192 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:08:03,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 216 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 528 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-01-09 23:08:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-09 23:08:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2022-01-09 23:08:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 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 23:08:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-01-09 23:08:03,276 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2022-01-09 23:08:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:08:03,276 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-01-09 23:08:03,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 0 states have call successors, (0), 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 23:08:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-01-09 23:08:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-09 23:08:03,277 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:08:03,277 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:08:03,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:08:03,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-09 23:08:03,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:08:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:08:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 12 times [2022-01-09 23:08:03,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:08:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958378964] [2022-01-09 23:08:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:08:03,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:08:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:08:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:03,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:08:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958378964] [2022-01-09 23:08:03,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958378964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:08:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072984353] [2022-01-09 23:08:03,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:08:03,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:08:03,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:08:03,589 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:08:03,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:08:03,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-09 23:08:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:08:03,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:08:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:08:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:03,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:08:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:04,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072984353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:08:04,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:08:04,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2022-01-09 23:08:04,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136719971] [2022-01-09 23:08:04,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:08:04,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-09 23:08:04,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:08:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-09 23:08:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-01-09 23:08:04,130 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 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 23:08:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:08:04,281 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-01-09 23:08:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:08:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 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 64 [2022-01-09 23:08:04,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:08:04,282 INFO L225 Difference]: With dead ends: 116 [2022-01-09 23:08:04,282 INFO L226 Difference]: Without dead ends: 71 [2022-01-09 23:08:04,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2022-01-09 23:08:04,282 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 58 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:08:04,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 108 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:08:04,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-09 23:08:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-01-09 23:08:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 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 23:08:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-09 23:08:04,289 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2022-01-09 23:08:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:08:04,289 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-09 23:08:04,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 0 states have call successors, (0), 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 23:08:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-09 23:08:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-09 23:08:04,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:08:04,290 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:08:04,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-09 23:08:04,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-09 23:08:04,507 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:08:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:08:04,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 13 times [2022-01-09 23:08:04,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:08:04,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856556360] [2022-01-09 23:08:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:08:04,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:08:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:08:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:04,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:08:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856556360] [2022-01-09 23:08:04,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856556360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:08:04,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116361331] [2022-01-09 23:08:04,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:08:04,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:08:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:08:04,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:08:04,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:08:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:08:04,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-09 23:08:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:08:04,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:08:04,974 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:04,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:04,988 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:04,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,030 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:05,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:05,044 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:05,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,092 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:05,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:05,105 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:05,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,145 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:05,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:05,157 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:05,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,193 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:05,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:05,211 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:05,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,254 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:05,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:05,269 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:05,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:08:05,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:05,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-09 23:08:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:05,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:08:06,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-01-09 23:08:06,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-01-09 23:08:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 42 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:06,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116361331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:08:06,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:08:06,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 45 [2022-01-09 23:08:06,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148941574] [2022-01-09 23:08:06,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:08:06,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-09 23:08:06,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:08:06,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-09 23:08:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-01-09 23:08:06,599 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 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 23:08:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:08:07,895 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2022-01-09 23:08:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-09 23:08:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 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 68 [2022-01-09 23:08:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:08:07,896 INFO L225 Difference]: With dead ends: 87 [2022-01-09 23:08:07,896 INFO L226 Difference]: Without dead ends: 85 [2022-01-09 23:08:07,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 122 SyntacticMatches, 17 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2181 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1333, Invalid=5473, Unknown=0, NotChecked=0, Total=6806 [2022-01-09 23:08:07,898 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 131 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:08:07,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 293 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 698 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-01-09 23:08:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-09 23:08:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2022-01-09 23:08:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:08:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-01-09 23:08:07,904 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-01-09 23:08:07,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:08:07,904 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-01-09 23:08:07,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 states have internal predecessors, (167), 0 states have call successors, (0), 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 23:08:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-01-09 23:08:07,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-09 23:08:07,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:08:07,905 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:08:07,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 23:08:08,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-09 23:08:08,106 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:08:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:08:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 14 times [2022-01-09 23:08:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:08:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547960514] [2022-01-09 23:08:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:08:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:08:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:08:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:08,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:08:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547960514] [2022-01-09 23:08:08,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547960514] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:08:08,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599879789] [2022-01-09 23:08:08,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:08:08,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:08:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:08:08,204 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:08:08,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 23:08:08,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:08:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:08:08,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-09 23:08:08,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:08:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:08,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:08:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:08,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599879789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:08:08,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:08:08,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2022-01-09 23:08:08,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143863205] [2022-01-09 23:08:08,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:08:08,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-09 23:08:08,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:08:08,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-09 23:08:08,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2022-01-09 23:08:08,745 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 23:08:08,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:08:08,874 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-01-09 23:08:08,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-09 23:08:08,879 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 72 [2022-01-09 23:08:08,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:08:08,880 INFO L225 Difference]: With dead ends: 128 [2022-01-09 23:08:08,880 INFO L226 Difference]: Without dead ends: 79 [2022-01-09 23:08:08,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:08:08,881 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:08:08,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 92 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:08:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-09 23:08:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-01-09 23:08:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:08:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-09 23:08:08,887 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 72 [2022-01-09 23:08:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:08:08,887 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-09 23:08:08,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 0 states have call successors, (0), 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 23:08:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-09 23:08:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-09 23:08:08,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:08:08,888 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:08:08,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 23:08:09,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:08:09,103 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:08:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:08:09,104 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 15 times [2022-01-09 23:08:09,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:08:09,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646000682] [2022-01-09 23:08:09,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:08:09,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:08:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:08:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:09,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:08:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646000682] [2022-01-09 23:08:09,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646000682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:08:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283967577] [2022-01-09 23:08:09,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:08:09,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:08:09,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:08:09,442 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:08:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 23:08:09,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-09 23:08:09,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:08:09,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 75 conjunts are in the unsatisfiable core [2022-01-09 23:08:09,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:08:09,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:08:09,773 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:09,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:09,796 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:09,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:09,830 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:09,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:09,843 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:09,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:09,879 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:09,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:09,891 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:09,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:09,927 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:09,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:09,940 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:09,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:09,981 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:09,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:09,995 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:09,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:10,035 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:10,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:10,049 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:10,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:10,087 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:08:10,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-01-09 23:08:10,100 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:10,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:10,195 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-09 23:08:10,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-09 23:08:10,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-01-09 23:08:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:10,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:08:12,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-09 23:08:12,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 184 [2022-01-09 23:08:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 48 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:08:12,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283967577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:08:12,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:08:12,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 59 [2022-01-09 23:08:12,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997980379] [2022-01-09 23:08:12,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:08:12,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-09 23:08:12,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:08:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-09 23:08:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2856, Unknown=0, NotChecked=0, Total=3422 [2022-01-09 23:08:12,399 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)