/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/pr2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:06:22,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:06:22,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:06:22,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:06:22,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:06:22,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:06:22,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:06:22,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:06:22,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:06:22,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:06:22,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:06:22,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:06:22,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:06:22,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:06:22,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:06:22,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:06:22,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:06:22,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:06:22,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:06:22,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:06:22,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:06:22,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:06:22,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:06:22,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:06:22,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:06:22,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:06:22,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:06:22,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:06:22,424 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 23:06:22,449 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:06:22,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:06:22,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:06:22,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:06:22,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:06:22,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:06:22,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:06:22,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:06:22,451 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:06:22,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:06:22,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:06:22,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:06:22,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:06:22,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:06:22,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:06:22,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:06:22,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:06:22,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:06:22,454 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:06:22,454 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:06:22,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:06:22,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:06:22,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:06:22,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:06:22,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:06:22,630 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:06:22,631 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:06:22,632 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/pr2.c [2022-01-09 23:06:22,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa0caa5/73fcd9b7888445b9a9e96cfed47f8007/FLAGcd8fe8e65 [2022-01-09 23:06:23,014 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:06:23,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/pr2.c [2022-01-09 23:06:23,022 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa0caa5/73fcd9b7888445b9a9e96cfed47f8007/FLAGcd8fe8e65 [2022-01-09 23:06:23,448 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa0caa5/73fcd9b7888445b9a9e96cfed47f8007 [2022-01-09 23:06:23,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:06:23,453 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:06:23,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:06:23,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:06:23,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:06:23,466 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,468 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@341a8ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23, skipping insertion in model container [2022-01-09 23:06:23,468 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:06:23,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:06:23,582 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/pr2.c[394,407] [2022-01-09 23:06:23,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:06:23,596 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:06:23,615 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/pr2.c[394,407] [2022-01-09 23:06:23,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:06:23,630 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:06:23,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23 WrapperNode [2022-01-09 23:06:23,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:06:23,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:06:23,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:06:23,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:06:23,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,672 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-01-09 23:06:23,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:06:23,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:06:23,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:06:23,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:06:23,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:06:23,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:06:23,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:06:23,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:06:23,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (1/1) ... [2022-01-09 23:06:23,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:06:23,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:23,717 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 23:06:23,719 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 23:06:23,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:06:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:06:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:06:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:06:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:06:23,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:06:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:06:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:06:23,786 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:06:23,787 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:06:23,906 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:06:23,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:06:23,910 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 23:06:23,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:06:23 BoogieIcfgContainer [2022-01-09 23:06:23,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:06:23,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:06:23,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:06:23,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:06:23,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:06:23" (1/3) ... [2022-01-09 23:06:23,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57acaf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:06:23, skipping insertion in model container [2022-01-09 23:06:23,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:06:23" (2/3) ... [2022-01-09 23:06:23,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57acaf7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:06:23, skipping insertion in model container [2022-01-09 23:06:23,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:06:23" (3/3) ... [2022-01-09 23:06:23,917 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.c [2022-01-09 23:06:23,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:06:23,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:06:23,960 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:06:23,964 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 23:06:23,964 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:06:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 23:06:23,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:23,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:23,981 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:23,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:23,985 INFO L85 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2022-01-09 23:06:24,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:24,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134256710] [2022-01-09 23:06:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:24,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:24,146 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 23:06:24,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134256710] [2022-01-09 23:06:24,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134256710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:24,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:24,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:06:24,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319362707] [2022-01-09 23:06:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:24,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:06:24,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:24,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:06:24,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:06:24,180 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:06:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:24,191 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2022-01-09 23:06:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:06:24,193 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-01-09 23:06:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:24,198 INFO L225 Difference]: With dead ends: 43 [2022-01-09 23:06:24,198 INFO L226 Difference]: Without dead ends: 19 [2022-01-09 23:06:24,201 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 23:06:24,205 INFO L933 BasicCegarLoop]: 30 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, 30 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 23:06:24,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-09 23:06:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-09 23:06:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 23:06:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-09 23:06:24,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2022-01-09 23:06:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:24,239 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-09 23:06:24,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:06:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-09 23:06:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 23:06:24,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:24,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:24,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:06:24,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2022-01-09 23:06:24,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961967913] [2022-01-09 23:06:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:24,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:24,341 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 23:06:24,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961967913] [2022-01-09 23:06:24,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961967913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:24,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:24,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:06:24,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730104180] [2022-01-09 23:06:24,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:24,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:06:24,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:06:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:06:24,348 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:06:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:24,384 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-01-09 23:06:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 23:06:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-01-09 23:06:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:24,386 INFO L225 Difference]: With dead ends: 28 [2022-01-09 23:06:24,386 INFO L226 Difference]: Without dead ends: 26 [2022-01-09 23:06:24,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:06:24,390 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-09 23:06:24,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-01-09 23:06:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:06:24,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-01-09 23:06:24,400 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-01-09 23:06:24,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:24,400 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-01-09 23:06:24,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:06:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-01-09 23:06:24,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 23:06:24,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:24,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:24,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 23:06:24,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2022-01-09 23:06:24,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258037261] [2022-01-09 23:06:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:24,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:24,558 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 23:06:24,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:24,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258037261] [2022-01-09 23:06:24,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258037261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:24,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:24,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 23:06:24,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73826105] [2022-01-09 23:06:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:24,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 23:06:24,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 23:06:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:06:24,560 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:06:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:24,603 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-01-09 23:06:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 23:06:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-01-09 23:06:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:24,604 INFO L225 Difference]: With dead ends: 36 [2022-01-09 23:06:24,604 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 23:06:24,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:06:24,610 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:24,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 23:06:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-09 23:06:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 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 23:06:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-01-09 23:06:24,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2022-01-09 23:06:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:24,620 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-01-09 23:06:24,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 23:06:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-01-09 23:06:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:06:24,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:24,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:24,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 23:06:24,621 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:24,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:24,622 INFO L85 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2022-01-09 23:06:24,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:24,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945592940] [2022-01-09 23:06:24,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:24,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:24,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945592940] [2022-01-09 23:06:24,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945592940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670633936] [2022-01-09 23:06:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:24,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:24,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:24,882 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 23:06:24,897 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 23:06:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 23:06:24,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:25,063 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 16 treesize of output 12 [2022-01-09 23:06:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:06:25,097 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 23:06:25,147 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 23:06:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:25,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:25,246 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 13 [2022-01-09 23:06:25,252 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 24 treesize of output 22 [2022-01-09 23:06:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:25,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670633936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:25,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:25,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2022-01-09 23:06:25,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563526894] [2022-01-09 23:06:25,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:25,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 23:06:25,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:25,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 23:06:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-09 23:06:25,274 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:06:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:25,675 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2022-01-09 23:06:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-09 23:06:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 23:06:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:25,676 INFO L225 Difference]: With dead ends: 104 [2022-01-09 23:06:25,677 INFO L226 Difference]: Without dead ends: 94 [2022-01-09 23:06:25,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:06:25,678 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 255 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:25,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 130 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:06:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-09 23:06:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 29. [2022-01-09 23:06:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 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 23:06:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-01-09 23:06:25,683 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-01-09 23:06:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:25,683 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-01-09 23:06:25,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 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 23:06:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-01-09 23:06:25,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:06:25,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:25,683 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:25,703 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 23:06:25,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:25,901 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2022-01-09 23:06:25,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494142463] [2022-01-09 23:06:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:25,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:25,947 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 23:06:25,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:25,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494142463] [2022-01-09 23:06:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494142463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:25,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:25,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:06:25,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344526954] [2022-01-09 23:06:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:25,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:06:25,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:06:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:06:25,949 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:25,970 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-01-09 23:06:25,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:06:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 23:06:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:25,973 INFO L225 Difference]: With dead ends: 54 [2022-01-09 23:06:25,973 INFO L226 Difference]: Without dead ends: 39 [2022-01-09 23:06:25,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:06:25,974 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:25,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-09 23:06:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-09 23:06:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:25,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-09 23:06:25,977 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 17 [2022-01-09 23:06:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:25,977 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-09 23:06:25,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:25,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-09 23:06:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-09 23:06:25,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:25,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:25,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-09 23:06:25,978 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:25,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2022-01-09 23:06:25,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965346017] [2022-01-09 23:06:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:25,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:26,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965346017] [2022-01-09 23:06:26,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965346017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:26,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073063114] [2022-01-09 23:06:26,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:26,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:26,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:26,109 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 23:06:26,126 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 23:06:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:26,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-09 23:06:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:26,190 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 16 treesize of output 12 [2022-01-09 23:06:26,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:06:26,206 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 41 treesize of output 40 [2022-01-09 23:06:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:26,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:26,305 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 13 [2022-01-09 23:06:26,307 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 24 treesize of output 22 [2022-01-09 23:06:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:26,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073063114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:26,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:26,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2022-01-09 23:06:26,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881910201] [2022-01-09 23:06:26,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:26,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:06:26,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:06:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:06:26,322 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 23:06:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:26,576 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2022-01-09 23:06:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 23:06:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-09 23:06:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:26,578 INFO L225 Difference]: With dead ends: 88 [2022-01-09 23:06:26,578 INFO L226 Difference]: Without dead ends: 86 [2022-01-09 23:06:26,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:06:26,580 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 146 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:06:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-09 23:06:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 37. [2022-01-09 23:06:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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 23:06:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-01-09 23:06:26,592 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-01-09 23:06:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:26,592 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-01-09 23:06:26,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 23:06:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-01-09 23:06:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 23:06:26,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:26,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:26,609 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 23:06:26,807 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 23:06:26,807 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2078603285, now seen corresponding path program 1 times [2022-01-09 23:06:26,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561154549] [2022-01-09 23:06:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:26,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:26,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:26,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561154549] [2022-01-09 23:06:26,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561154549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:26,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:26,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:06:26,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605889713] [2022-01-09 23:06:26,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:26,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:06:26,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:06:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:06:26,838 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 23:06:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:26,851 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-01-09 23:06:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:06:26,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Word has length 21 [2022-01-09 23:06:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:26,853 INFO L225 Difference]: With dead ends: 57 [2022-01-09 23:06:26,853 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 23:06:26,854 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 23:06:26,854 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:26,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:26,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 23:06:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-09 23:06:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 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 23:06:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-09 23:06:26,860 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 21 [2022-01-09 23:06:26,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:26,860 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-09 23:06:26,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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 23:06:26,860 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-09 23:06:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 23:06:26,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:26,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:26,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-09 23:06:26,861 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2022-01-09 23:06:26,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:26,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802715469] [2022-01-09 23:06:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:26,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:26,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:26,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802715469] [2022-01-09 23:06:26,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802715469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:26,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510430176] [2022-01-09 23:06:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:26,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:26,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:26,993 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 23:06:27,014 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 23:06:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:27,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 23:06:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:27,074 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 13 treesize of output 9 [2022-01-09 23:06:27,160 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 23:06:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:27,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:27,219 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 17 treesize of output 15 [2022-01-09 23:06:27,226 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 30 treesize of output 26 [2022-01-09 23:06:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:27,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510430176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:27,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:27,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-01-09 23:06:27,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368774672] [2022-01-09 23:06:27,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:27,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 23:06:27,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 23:06:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-01-09 23:06:27,245 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:27,394 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-01-09 23:06:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:06:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-09 23:06:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:27,395 INFO L225 Difference]: With dead ends: 85 [2022-01-09 23:06:27,395 INFO L226 Difference]: Without dead ends: 68 [2022-01-09 23:06:27,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:06:27,396 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:27,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 123 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:06:27,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-09 23:06:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-01-09 23:06:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 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 23:06:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-09 23:06:27,400 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2022-01-09 23:06:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:27,400 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-09 23:06:27,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-09 23:06:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 23:06:27,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:27,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:27,419 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 23:06:27,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:27,606 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:27,606 INFO L85 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2022-01-09 23:06:27,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:27,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416094746] [2022-01-09 23:06:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:27,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:27,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:27,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416094746] [2022-01-09 23:06:27,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416094746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:27,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566953222] [2022-01-09 23:06:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:27,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:27,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:27,692 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 23:06:27,720 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 23:06:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-09 23:06:27,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:27,763 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 22 treesize of output 18 [2022-01-09 23:06:27,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:27,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:27,904 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 17 treesize of output 15 [2022-01-09 23:06:27,905 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 30 treesize of output 26 [2022-01-09 23:06:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:27,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566953222] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:27,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:27,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-01-09 23:06:27,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390361825] [2022-01-09 23:06:27,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:27,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:06:27,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:27,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:06:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:06:27,921 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 23:06:28,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:28,174 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-01-09 23:06:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 23:06:28,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 23 [2022-01-09 23:06:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:28,175 INFO L225 Difference]: With dead ends: 102 [2022-01-09 23:06:28,175 INFO L226 Difference]: Without dead ends: 100 [2022-01-09 23:06:28,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:06:28,176 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:28,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 143 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:06:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-09 23:06:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2022-01-09 23:06:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 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 23:06:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-01-09 23:06:28,182 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2022-01-09 23:06:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:28,183 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-01-09 23:06:28,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 23:06:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-01-09 23:06:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-09 23:06:28,186 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:28,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:28,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-09 23:06:28,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:28,399 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:28,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2022-01-09 23:06:28,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:28,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046831935] [2022-01-09 23:06:28,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:28,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:06:28,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046831935] [2022-01-09 23:06:28,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046831935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:06:28,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:06:28,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:06:28,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3648031] [2022-01-09 23:06:28,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:06:28,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:06:28,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:06:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:06:28,421 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:06:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:28,431 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-01-09 23:06:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:06:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 27 [2022-01-09 23:06:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:28,431 INFO L225 Difference]: With dead ends: 80 [2022-01-09 23:06:28,431 INFO L226 Difference]: Without dead ends: 63 [2022-01-09 23:06:28,432 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 23:06:28,432 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:28,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:06:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-09 23:06:28,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2022-01-09 23:06:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 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 23:06:28,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-01-09 23:06:28,437 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2022-01-09 23:06:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:28,437 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-01-09 23:06:28,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 23:06:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-01-09 23:06:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 23:06:28,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:28,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:28,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-09 23:06:28,438 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:28,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:28,438 INFO L85 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2022-01-09 23:06:28,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:28,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960055593] [2022-01-09 23:06:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:28,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:28,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960055593] [2022-01-09 23:06:28,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960055593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013840975] [2022-01-09 23:06:28,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:06:28,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:28,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:28,595 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 23:06:28,596 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 23:06:28,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:06:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 23:06:28,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:28,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013840975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:29,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:29,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-01-09 23:06:29,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904207353] [2022-01-09 23:06:29,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:29,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-09 23:06:29,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:29,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-09 23:06:29,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:06:29,016 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 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 23:06:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:29,163 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-01-09 23:06:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-09 23:06:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-09 23:06:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:29,164 INFO L225 Difference]: With dead ends: 108 [2022-01-09 23:06:29,164 INFO L226 Difference]: Without dead ends: 72 [2022-01-09 23:06:29,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-01-09 23:06:29,165 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:29,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 84 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:06:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-09 23:06:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2022-01-09 23:06:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 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 23:06:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-01-09 23:06:29,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2022-01-09 23:06:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:29,170 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-01-09 23:06:29,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 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 23:06:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-01-09 23:06:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-09 23:06:29,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:29,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:29,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:06:29,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:06:29,387 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2022-01-09 23:06:29,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045394975] [2022-01-09 23:06:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:29,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:29,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:29,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045394975] [2022-01-09 23:06:29,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045394975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:29,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400603376] [2022-01-09 23:06:29,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:06:29,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:29,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:29,526 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 23:06:29,527 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 23:06:29,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:06:29,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:29,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-09 23:06:29,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:29,667 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 16 treesize of output 12 [2022-01-09 23:06:29,696 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-09 23:06:29,697 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 23 treesize of output 22 [2022-01-09 23:06:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:29,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:30,089 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 51 treesize of output 47 [2022-01-09 23:06:30,091 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 175 treesize of output 167 [2022-01-09 23:06:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400603376] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:30,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:30,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 32 [2022-01-09 23:06:30,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128255545] [2022-01-09 23:06:30,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:30,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 23:06:30,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 23:06:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:06:30,336 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 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 23:06:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:31,711 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-01-09 23:06:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-09 23:06:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 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 33 [2022-01-09 23:06:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:31,711 INFO L225 Difference]: With dead ends: 153 [2022-01-09 23:06:31,711 INFO L226 Difference]: Without dead ends: 143 [2022-01-09 23:06:31,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=752, Invalid=4360, Unknown=0, NotChecked=0, Total=5112 [2022-01-09 23:06:31,713 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 477 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:31,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 161 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 573 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-01-09 23:06:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-09 23:06:31,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 71. [2022-01-09 23:06:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 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 23:06:31,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2022-01-09 23:06:31,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2022-01-09 23:06:31,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:31,720 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2022-01-09 23:06:31,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 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 23:06:31,720 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2022-01-09 23:06:31,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:06:31,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:31,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:31,749 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 23:06:31,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:31,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2022-01-09 23:06:31,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:31,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850558898] [2022-01-09 23:06:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:31,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:32,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850558898] [2022-01-09 23:06:32,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850558898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:32,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599059148] [2022-01-09 23:06:32,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:06:32,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:32,151 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 23:06:32,152 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 23:06:32,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:06:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-09 23:06:32,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:32,241 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 13 treesize of output 9 [2022-01-09 23:06:32,378 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 23:06:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:32,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:32,497 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 17 treesize of output 15 [2022-01-09 23:06:32,499 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 34 treesize of output 30 [2022-01-09 23:06:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:32,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599059148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:32,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:32,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-01-09 23:06:32,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33949489] [2022-01-09 23:06:32,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:32,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-09 23:06:32,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:32,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-09 23:06:32,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:06:32,553 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:06:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:33,077 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-01-09 23:06:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-09 23:06:33,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 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 39 [2022-01-09 23:06:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:33,079 INFO L225 Difference]: With dead ends: 129 [2022-01-09 23:06:33,079 INFO L226 Difference]: Without dead ends: 119 [2022-01-09 23:06:33,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-01-09 23:06:33,080 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:33,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 206 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:06:33,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-09 23:06:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2022-01-09 23:06:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 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 23:06:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-01-09 23:06:33,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 39 [2022-01-09 23:06:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:33,093 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-01-09 23:06:33,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:06:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-01-09 23:06:33,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:06:33,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:33,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:33,131 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 23:06:33,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:33,314 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:33,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 2 times [2022-01-09 23:06:33,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:33,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279367560] [2022-01-09 23:06:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:33,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:33,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279367560] [2022-01-09 23:06:33,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279367560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:33,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622642356] [2022-01-09 23:06:33,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:06:33,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:33,473 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 23:06:33,474 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 23:06:33,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:06:33,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:33,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-09 23:06:33,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:33,540 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 13 treesize of output 9 [2022-01-09 23:06:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:33,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:33,747 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 17 treesize of output 15 [2022-01-09 23:06:33,749 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 30 treesize of output 26 [2022-01-09 23:06:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622642356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:33,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:33,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-01-09 23:06:33,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406352867] [2022-01-09 23:06:33,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-09 23:06:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-09 23:06:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-01-09 23:06:33,771 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 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 23:06:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:34,463 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2022-01-09 23:06:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-09 23:06:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 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 39 [2022-01-09 23:06:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:34,464 INFO L225 Difference]: With dead ends: 169 [2022-01-09 23:06:34,464 INFO L226 Difference]: Without dead ends: 167 [2022-01-09 23:06:34,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2022-01-09 23:06:34,466 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:34,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 257 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 23:06:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-09 23:06:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 83. [2022-01-09 23:06:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:06:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-01-09 23:06:34,472 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 39 [2022-01-09 23:06:34,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:34,472 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-01-09 23:06:34,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 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 23:06:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-01-09 23:06:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-09 23:06:34,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:34,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:34,489 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 23:06:34,687 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,SelfDestructingSolverStorable13 [2022-01-09 23:06:34,687 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2022-01-09 23:06:34,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:34,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031266442] [2022-01-09 23:06:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:34,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:34,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031266442] [2022-01-09 23:06:34,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031266442] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376919528] [2022-01-09 23:06:34,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:06:34,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:34,940 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 23:06:34,941 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 23:06:35,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-09 23:06:35,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:35,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 23:06:35,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:35,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:35,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376919528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:35,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:35,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-01-09 23:06:35,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322557816] [2022-01-09 23:06:35,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:35,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 23:06:35,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:35,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 23:06:35,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 23:06:35,612 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:06:35,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:35,840 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2022-01-09 23:06:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 23:06:35,841 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 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 45 [2022-01-09 23:06:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:35,841 INFO L225 Difference]: With dead ends: 164 [2022-01-09 23:06:35,841 INFO L226 Difference]: Without dead ends: 104 [2022-01-09 23:06:35,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2022-01-09 23:06:35,842 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 228 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:35,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 170 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:06:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-09 23:06:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-01-09 23:06:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 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 23:06:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-01-09 23:06:35,849 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 45 [2022-01-09 23:06:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-01-09 23:06:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 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 23:06:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-01-09 23:06:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 23:06:35,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:35,850 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:35,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-09 23:06:36,053 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,SelfDestructingSolverStorable14 [2022-01-09 23:06:36,054 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2022-01-09 23:06:36,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438517284] [2022-01-09 23:06:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:36,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:36,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438517284] [2022-01-09 23:06:36,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438517284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:36,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551757993] [2022-01-09 23:06:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:06:36,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:36,215 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 23:06:36,216 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 23:06:36,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-09 23:06:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-09 23:06:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:36,385 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 16 treesize of output 12 [2022-01-09 23:06:36,438 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-09 23:06:36,438 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 23 treesize of output 22 [2022-01-09 23:06:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:36,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:36,937 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 25 treesize of output 23 [2022-01-09 23:06:36,940 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 200 treesize of output 192 [2022-01-09 23:06:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:37,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551757993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:37,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:37,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-01-09 23:06:37,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403845770] [2022-01-09 23:06:37,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:37,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-09 23:06:37,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-09 23:06:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-01-09 23:06:37,077 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 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 23:06:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:38,744 INFO L93 Difference]: Finished difference Result 225 states and 249 transitions. [2022-01-09 23:06:38,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-09 23:06:38,744 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-09 23:06:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:38,745 INFO L225 Difference]: With dead ends: 225 [2022-01-09 23:06:38,745 INFO L226 Difference]: Without dead ends: 215 [2022-01-09 23:06:38,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=843, Invalid=5799, Unknown=0, NotChecked=0, Total=6642 [2022-01-09 23:06:38,747 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 379 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:38,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 564 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1264 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-01-09 23:06:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-09 23:06:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 125. [2022-01-09 23:06:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 124 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-01-09 23:06:38,756 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2022-01-09 23:06:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-01-09 23:06:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 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 23:06:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-01-09 23:06:38,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 23:06:38,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:38,757 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:38,775 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 23:06:38,971 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,SelfDestructingSolverStorable15 [2022-01-09 23:06:38,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash 746381232, now seen corresponding path program 1 times [2022-01-09 23:06:38,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600570054] [2022-01-09 23:06:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:38,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:39,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600570054] [2022-01-09 23:06:39,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600570054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:39,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263401335] [2022-01-09 23:06:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:39,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:39,100 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 23:06:39,100 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 23:06:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-09 23:06:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:39,182 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 16 treesize of output 12 [2022-01-09 23:06:39,196 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:06:39,196 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 29 treesize of output 28 [2022-01-09 23:06:39,354 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-09 23:06:39,355 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 42 treesize of output 20 [2022-01-09 23:06:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:39,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:39,475 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 17 treesize of output 15 [2022-01-09 23:06:39,476 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 30 treesize of output 26 [2022-01-09 23:06:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:39,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263401335] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:39,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:39,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-01-09 23:06:39,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625372046] [2022-01-09 23:06:39,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:39,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:06:39,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:06:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:06:39,508 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 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 23:06:40,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:40,313 INFO L93 Difference]: Finished difference Result 247 states and 275 transitions. [2022-01-09 23:06:40,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-09 23:06:40,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-01-09 23:06:40,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:40,315 INFO L225 Difference]: With dead ends: 247 [2022-01-09 23:06:40,315 INFO L226 Difference]: Without dead ends: 245 [2022-01-09 23:06:40,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=427, Invalid=2995, Unknown=0, NotChecked=0, Total=3422 [2022-01-09 23:06:40,316 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:40,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 294 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 23:06:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-09 23:06:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 131. [2022-01-09 23:06:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:06:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-01-09 23:06:40,326 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 49 [2022-01-09 23:06:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:40,326 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-01-09 23:06:40,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 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 23:06:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-01-09 23:06:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-09 23:06:40,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:40,327 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:40,342 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 23:06:40,531 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,SelfDestructingSolverStorable16 [2022-01-09 23:06:40,531 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:40,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 3 times [2022-01-09 23:06:40,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:40,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105807811] [2022-01-09 23:06:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:40,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:40,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105807811] [2022-01-09 23:06:40,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105807811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974996405] [2022-01-09 23:06:40,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:06:40,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:40,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:40,646 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 23:06:40,671 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 23:06:40,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-09 23:06:40,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-09 23:06:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:40,764 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 16 treesize of output 12 [2022-01-09 23:06:40,966 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-09 23:06:40,966 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 42 treesize of output 20 [2022-01-09 23:06:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:40,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:41,083 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 17 treesize of output 15 [2022-01-09 23:06:41,084 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 30 treesize of output 26 [2022-01-09 23:06:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:41,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974996405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:41,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:41,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-01-09 23:06:41,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791624717] [2022-01-09 23:06:41,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:41,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 23:06:41,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 23:06:41,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:06:41,119 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:06:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:42,478 INFO L93 Difference]: Finished difference Result 348 states and 391 transitions. [2022-01-09 23:06:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-09 23:06:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 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 55 [2022-01-09 23:06:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:42,480 INFO L225 Difference]: With dead ends: 348 [2022-01-09 23:06:42,480 INFO L226 Difference]: Without dead ends: 346 [2022-01-09 23:06:42,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=915, Invalid=8397, Unknown=0, NotChecked=0, Total=9312 [2022-01-09 23:06:42,482 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 249 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:42,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 453 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:06:42,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-01-09 23:06:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 143. [2022-01-09 23:06:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 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 23:06:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-01-09 23:06:42,494 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 55 [2022-01-09 23:06:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-01-09 23:06:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 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 23:06:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-01-09 23:06:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-09 23:06:42,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:42,495 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:42,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:06:42,711 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,SelfDestructingSolverStorable17 [2022-01-09 23:06:42,712 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 7 times [2022-01-09 23:06:42,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:42,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170400615] [2022-01-09 23:06:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:42,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:43,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:43,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170400615] [2022-01-09 23:06:43,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170400615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:43,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865660850] [2022-01-09 23:06:43,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:06:43,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:43,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:43,009 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 23:06:43,010 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 23:06:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:43,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-09 23:06:43,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:43,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865660850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:43,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:43,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2022-01-09 23:06:43,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646188091] [2022-01-09 23:06:43,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:43,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-09 23:06:43,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:43,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-09 23:06:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2022-01-09 23:06:43,868 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 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 23:06:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:44,164 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2022-01-09 23:06:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 23:06:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 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 61 [2022-01-09 23:06:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:44,165 INFO L225 Difference]: With dead ends: 272 [2022-01-09 23:06:44,165 INFO L226 Difference]: Without dead ends: 164 [2022-01-09 23:06:44,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2022-01-09 23:06:44,167 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 292 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:44,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 263 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:06:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-09 23:06:44,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-01-09 23:06:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.103896103896104) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 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 23:06:44,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2022-01-09 23:06:44,179 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 61 [2022-01-09 23:06:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:44,179 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2022-01-09 23:06:44,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 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 23:06:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2022-01-09 23:06:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-09 23:06:44,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:44,180 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:44,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-09 23:06:44,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:44,387 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:44,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 8 times [2022-01-09 23:06:44,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:44,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546630229] [2022-01-09 23:06:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:44,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:44,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:44,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546630229] [2022-01-09 23:06:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546630229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:44,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607643084] [2022-01-09 23:06:44,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:06:44,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:44,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:44,595 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 23:06:44,611 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 23:06:44,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:06:44,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:44,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-09 23:06:44,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:44,839 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 16 treesize of output 12 [2022-01-09 23:06:44,866 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-09 23:06:44,867 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 23 treesize of output 22 [2022-01-09 23:06:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:45,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:45,683 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 35 treesize of output 31 [2022-01-09 23:06:45,686 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 67 treesize of output 59 [2022-01-09 23:06:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:46,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607643084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:46,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:46,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 19] total 50 [2022-01-09 23:06:46,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093469160] [2022-01-09 23:06:46,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:46,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-09 23:06:46,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:46,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-09 23:06:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2022-01-09 23:06:46,024 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 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 23:06:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:50,260 INFO L93 Difference]: Finished difference Result 395 states and 438 transitions. [2022-01-09 23:06:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-09 23:06:50,260 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 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 65 [2022-01-09 23:06:50,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:50,269 INFO L225 Difference]: With dead ends: 395 [2022-01-09 23:06:50,269 INFO L226 Difference]: Without dead ends: 385 [2022-01-09 23:06:50,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7306 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2211, Invalid=21659, Unknown=0, NotChecked=0, Total=23870 [2022-01-09 23:06:50,273 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 476 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:50,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 522 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-09 23:06:50,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-09 23:06:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 161. [2022-01-09 23:06:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1) internal successors, (176), 160 states have internal predecessors, (176), 0 states have call successors, (0), 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 23:06:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2022-01-09 23:06:50,290 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 65 [2022-01-09 23:06:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:50,291 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2022-01-09 23:06:50,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 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 23:06:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2022-01-09 23:06:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-09 23:06:50,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:50,291 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:50,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-09 23:06:50,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:50,492 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:50,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1382106319, now seen corresponding path program 2 times [2022-01-09 23:06:50,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:50,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850125979] [2022-01-09 23:06:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:50,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:50,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:50,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850125979] [2022-01-09 23:06:50,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850125979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:50,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146731441] [2022-01-09 23:06:50,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:06:50,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:50,673 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 23:06:50,674 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 23:06:50,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:06:50,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-09 23:06:50,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:50,786 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 16 treesize of output 12 [2022-01-09 23:06:50,801 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-01-09 23:06:50,801 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 29 treesize of output 28 [2022-01-09 23:06:51,081 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-09 23:06:51,081 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 42 treesize of output 20 [2022-01-09 23:06:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:51,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:51,214 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 17 treesize of output 15 [2022-01-09 23:06:51,215 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 30 treesize of output 26 [2022-01-09 23:06:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:51,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146731441] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:51,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:51,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-01-09 23:06:51,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181992469] [2022-01-09 23:06:51,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:51,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-09 23:06:51,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-09 23:06:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-09 23:06:51,274 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 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 23:06:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:52,855 INFO L93 Difference]: Finished difference Result 411 states and 460 transitions. [2022-01-09 23:06:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-09 23:06:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 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 65 [2022-01-09 23:06:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:52,856 INFO L225 Difference]: With dead ends: 411 [2022-01-09 23:06:52,856 INFO L226 Difference]: Without dead ends: 409 [2022-01-09 23:06:52,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1090, Invalid=11342, Unknown=0, NotChecked=0, Total=12432 [2022-01-09 23:06:52,857 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 388 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:52,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 382 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-09 23:06:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-09 23:06:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 167. [2022-01-09 23:06:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 166 states have internal predecessors, (183), 0 states have call successors, (0), 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 23:06:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2022-01-09 23:06:52,873 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 65 [2022-01-09 23:06:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:52,873 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2022-01-09 23:06:52,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 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 23:06:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2022-01-09 23:06:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-09 23:06:52,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:52,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:52,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-09 23:06:53,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:53,080 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1975375134, now seen corresponding path program 9 times [2022-01-09 23:06:53,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:53,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609329047] [2022-01-09 23:06:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:53,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:53,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609329047] [2022-01-09 23:06:53,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609329047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:53,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9540522] [2022-01-09 23:06:53,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:06:53,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:53,291 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:06:53,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-09 23:06:53,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-09 23:06:53,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:53,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-09 23:06:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:53,526 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 13 treesize of output 9 [2022-01-09 23:06:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:53,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:54,180 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 17 treesize of output 15 [2022-01-09 23:06:54,182 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 34 treesize of output 30 [2022-01-09 23:06:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9540522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:54,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:54,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 45 [2022-01-09 23:06:54,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797757084] [2022-01-09 23:06:54,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:54,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-09 23:06:54,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-09 23:06:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2022-01-09 23:06:54,279 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 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 23:06:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:06:57,089 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2022-01-09 23:06:57,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-09 23:06:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 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 71 [2022-01-09 23:06:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:06:57,092 INFO L225 Difference]: With dead ends: 364 [2022-01-09 23:06:57,092 INFO L226 Difference]: Without dead ends: 354 [2022-01-09 23:06:57,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3607 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1344, Invalid=12698, Unknown=0, NotChecked=0, Total=14042 [2022-01-09 23:06:57,093 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 443 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-09 23:06:57,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 607 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-09 23:06:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-09 23:06:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 173. [2022-01-09 23:06:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 172 states have internal predecessors, (189), 0 states have call successors, (0), 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 23:06:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 189 transitions. [2022-01-09 23:06:57,109 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 189 transitions. Word has length 71 [2022-01-09 23:06:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:06:57,109 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 189 transitions. [2022-01-09 23:06:57,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 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 23:06:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 189 transitions. [2022-01-09 23:06:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-09 23:06:57,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:06:57,110 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:06:57,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-09 23:06:57,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-09 23:06:57,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:06:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:06:57,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1821094634, now seen corresponding path program 4 times [2022-01-09 23:06:57,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:06:57,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208631419] [2022-01-09 23:06:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:06:57,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:06:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:06:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:57,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:06:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208631419] [2022-01-09 23:06:57,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208631419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:06:57,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350064827] [2022-01-09 23:06:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:06:57,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:06:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:06:57,500 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:06:57,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-09 23:06:57,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:06:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:06:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-09 23:06:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:06:57,610 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 16 treesize of output 12 [2022-01-09 23:06:57,887 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-09 23:06:57,887 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 42 treesize of output 20 [2022-01-09 23:06:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:06:58,012 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 17 treesize of output 15 [2022-01-09 23:06:58,013 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 30 treesize of output 26 [2022-01-09 23:06:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:06:58,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350064827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:06:58,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:06:58,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 26 [2022-01-09 23:06:58,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860604339] [2022-01-09 23:06:58,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:06:58,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-09 23:06:58,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:06:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-09 23:06:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-01-09 23:06:58,058 INFO L87 Difference]: Start difference. First operand 173 states and 189 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 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 23:07:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:01,067 INFO L93 Difference]: Finished difference Result 582 states and 654 transitions. [2022-01-09 23:07:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-01-09 23:07:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 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 71 [2022-01-09 23:07:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:01,069 INFO L225 Difference]: With dead ends: 582 [2022-01-09 23:07:01,069 INFO L226 Difference]: Without dead ends: 580 [2022-01-09 23:07:01,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13930 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2296, Invalid=32114, Unknown=0, NotChecked=0, Total=34410 [2022-01-09 23:07:01,071 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 558 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:01,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 657 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-09 23:07:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-09 23:07:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 179. [2022-01-09 23:07:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.101123595505618) internal successors, (196), 178 states have internal predecessors, (196), 0 states have call successors, (0), 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 23:07:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 196 transitions. [2022-01-09 23:07:01,090 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 196 transitions. Word has length 71 [2022-01-09 23:07:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:01,090 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 196 transitions. [2022-01-09 23:07:01,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 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 23:07:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 196 transitions. [2022-01-09 23:07:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-09 23:07:01,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:01,090 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:01,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:01,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:01,299 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:01,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:01,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1772484533, now seen corresponding path program 10 times [2022-01-09 23:07:01,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:01,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380567874] [2022-01-09 23:07:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:01,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:01,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380567874] [2022-01-09 23:07:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380567874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267714391] [2022-01-09 23:07:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:07:01,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:01,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:01,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:01,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-09 23:07:01,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:07:01,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:01,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-09 23:07:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:02,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:02,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267714391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:02,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:02,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-01-09 23:07:02,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554199076] [2022-01-09 23:07:02,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:02,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-09 23:07:02,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:02,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-09 23:07:02,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-01-09 23:07:02,777 INFO L87 Difference]: Start difference. First operand 179 states and 196 transitions. Second operand has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 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 23:07:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:03,126 INFO L93 Difference]: Finished difference Result 332 states and 364 transitions. [2022-01-09 23:07:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 23:07:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-01-09 23:07:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:03,128 INFO L225 Difference]: With dead ends: 332 [2022-01-09 23:07:03,128 INFO L226 Difference]: Without dead ends: 200 [2022-01-09 23:07:03,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-01-09 23:07:03,134 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 447 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:03,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 302 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:07:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-09 23:07:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2022-01-09 23:07:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0947368421052632) internal successors, (208), 190 states have internal predecessors, (208), 0 states have call successors, (0), 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 23:07:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 208 transitions. [2022-01-09 23:07:03,156 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 208 transitions. Word has length 77 [2022-01-09 23:07:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 208 transitions. [2022-01-09 23:07:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 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 23:07:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 208 transitions. [2022-01-09 23:07:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-09 23:07:03,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:03,157 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:03,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:03,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:03,374 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1608818642, now seen corresponding path program 11 times [2022-01-09 23:07:03,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267589261] [2022-01-09 23:07:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:03,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:03,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267589261] [2022-01-09 23:07:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267589261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657490672] [2022-01-09 23:07:03,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:07:03,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:03,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:03,633 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:03,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-09 23:07:03,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-09 23:07:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:03,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-09 23:07:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:03,988 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 16 treesize of output 12 [2022-01-09 23:07:04,019 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-09 23:07:04,019 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 23 treesize of output 22 [2022-01-09 23:07:04,459 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 23:07:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:04,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:04,810 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 17 treesize of output 15 [2022-01-09 23:07:04,812 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 34 treesize of output 30 [2022-01-09 23:07:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:05,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657490672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:05,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:05,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 56 [2022-01-09 23:07:05,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899897279] [2022-01-09 23:07:05,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:05,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-09 23:07:05,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-09 23:07:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2854, Unknown=0, NotChecked=0, Total=3080 [2022-01-09 23:07:05,077 INFO L87 Difference]: Start difference. First operand 191 states and 208 transitions. Second operand has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 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 23:07:08,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:08,592 INFO L93 Difference]: Finished difference Result 398 states and 428 transitions. [2022-01-09 23:07:08,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-09 23:07:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-09 23:07:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:08,594 INFO L225 Difference]: With dead ends: 398 [2022-01-09 23:07:08,594 INFO L226 Difference]: Without dead ends: 388 [2022-01-09 23:07:08,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 131 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5476 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1823, Invalid=17359, Unknown=0, NotChecked=0, Total=19182 [2022-01-09 23:07:08,595 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 619 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:08,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 930 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2074 Invalid, 0 Unknown, 561 Unchecked, 0.9s Time] [2022-01-09 23:07:08,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-09 23:07:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 197. [2022-01-09 23:07:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0918367346938775) internal successors, (214), 196 states have internal predecessors, (214), 0 states have call successors, (0), 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 23:07:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2022-01-09 23:07:08,615 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 81 [2022-01-09 23:07:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:08,615 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2022-01-09 23:07:08,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 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 23:07:08,615 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2022-01-09 23:07:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-09 23:07:08,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:08,616 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:08,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-09 23:07:08,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:08,820 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:08,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1818791992, now seen corresponding path program 5 times [2022-01-09 23:07:08,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:08,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426936155] [2022-01-09 23:07:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:08,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:09,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:09,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426936155] [2022-01-09 23:07:09,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426936155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:09,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374349174] [2022-01-09 23:07:09,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:07:09,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:09,043 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:09,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-09 23:07:09,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-09 23:07:09,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-09 23:07:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:09,328 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 16 treesize of output 12 [2022-01-09 23:07:09,389 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-09 23:07:09,389 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 26 treesize of output 25 [2022-01-09 23:07:09,403 INFO L353 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-01-09 23:07:09,403 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 26 treesize of output 25 [2022-01-09 23:07:09,817 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 23:07:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:07:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:07:12,300 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_320| Int)) (or (forall ((v_ArrVal_603 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_320|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_603) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_320|)))) is different from false [2022-01-09 23:07:12,311 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 25 treesize of output 23 [2022-01-09 23:07:12,313 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 200 treesize of output 192 [2022-01-09 23:07:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 181 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-01-09 23:07:12,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374349174] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:07:12,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:07:12,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 54 [2022-01-09 23:07:12,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46128597] [2022-01-09 23:07:12,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:07:12,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-09 23:07:12,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:07:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-09 23:07:12,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2590, Unknown=1, NotChecked=102, Total=2862 [2022-01-09 23:07:12,637 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 54 states, 54 states have (on average 4.166666666666667) internal successors, (225), 54 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:07:15,564 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8))) (forall ((|v_ULTIMATE.start_main_~i~0#1_320| Int)) (or (forall ((v_ArrVal_603 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_320|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_603) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_320|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= (select .cse0 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 0) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 3 (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-01-09 23:07:17,580 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_320| Int)) (or (forall ((v_ArrVal_603 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_320|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_603) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_320|)))) (<= (select .cse0 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 0) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 3 (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2022-01-09 23:07:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:07:20,053 INFO L93 Difference]: Finished difference Result 335 states and 364 transitions. [2022-01-09 23:07:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-09 23:07:20,054 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.166666666666667) internal successors, (225), 54 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-01-09 23:07:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:07:20,055 INFO L225 Difference]: With dead ends: 335 [2022-01-09 23:07:20,055 INFO L226 Difference]: Without dead ends: 325 [2022-01-09 23:07:20,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1040, Invalid=17601, Unknown=3, NotChecked=816, Total=19460 [2022-01-09 23:07:20,058 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 834 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 4631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-09 23:07:20,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 2007 Invalid, 4631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 3974 Invalid, 0 Unknown, 368 Unchecked, 1.4s Time] [2022-01-09 23:07:20,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-09 23:07:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 215. [2022-01-09 23:07:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.088785046728972) internal successors, (233), 214 states have internal predecessors, (233), 0 states have call successors, (0), 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 23:07:20,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 233 transitions. [2022-01-09 23:07:20,080 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 233 transitions. Word has length 81 [2022-01-09 23:07:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:07:20,080 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 233 transitions. [2022-01-09 23:07:20,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.166666666666667) internal successors, (225), 54 states have internal predecessors, (225), 0 states have call successors, (0), 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 23:07:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 233 transitions. [2022-01-09 23:07:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-09 23:07:20,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:07:20,081 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:07:20,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-01-09 23:07:20,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-09 23:07:20,285 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:07:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:07:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 307512236, now seen corresponding path program 3 times [2022-01-09 23:07:20,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:07:20,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229967043] [2022-01-09 23:07:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:07:20,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:07:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:07:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:07:20,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:07:20,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229967043] [2022-01-09 23:07:20,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229967043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:07:20,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081456303] [2022-01-09 23:07:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:07:20,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:07:20,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:07:20,477 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:07:20,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-09 23:07:20,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-09 23:07:20,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:07:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-09 23:07:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:07:20,670 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 16 treesize of output 12 [2022-01-09 23:07:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,700 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 29 treesize of output 28 [2022-01-09 23:07:20,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,746 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 24 treesize of output 23 [2022-01-09 23:07:20,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,759 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 24 treesize of output 23 [2022-01-09 23:07:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,801 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 24 treesize of output 23 [2022-01-09 23:07:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,812 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 24 treesize of output 23 [2022-01-09 23:07:20,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,852 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 24 treesize of output 23 [2022-01-09 23:07:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,865 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 24 treesize of output 23 [2022-01-09 23:07:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:20,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:07:20,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-09 23:07:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:21,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:21,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:07:21,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-01-09 23:07:21,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:07:21,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-09 23:07:21,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-01-09 23:07:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-01-09 23:07:21,220 INFO L328 TraceCheckSpWp]: Computing backward predicates...