/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:34:33,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:34:33,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:34:33,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 14:34:33,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:34:33,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:34:33,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:34:33,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:34:33,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:34:33,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:34:33,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:34:33,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:34:33,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:34:33,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:34:33,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:34:33,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:34:33,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 14:34:33,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 14:34:33,808 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:34:33,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:34:33,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:34:33,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:34:33,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:34:33,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:34:33,809 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:34:33,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:34:33,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:34:33,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:34:33,811 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:34:33,811 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:34:33,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:34:33,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:34:33,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:34:33,997 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:34:34,000 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:34:34,001 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_6.c [2022-01-10 14:34:34,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e789fd3/c0aef4aef7924f1fba8a76a541297df5/FLAG917b04402 [2022-01-10 14:34:34,440 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:34:34,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_6.c [2022-01-10 14:34:34,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e789fd3/c0aef4aef7924f1fba8a76a541297df5/FLAG917b04402 [2022-01-10 14:34:34,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e789fd3/c0aef4aef7924f1fba8a76a541297df5 [2022-01-10 14:34:34,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:34:34,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:34:34,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:34:34,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:34:34,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:34:34,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7ad059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34, skipping insertion in model container [2022-01-10 14:34:34,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:34:34,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:34:34,621 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_6.c[959,972] [2022-01-10 14:34:34,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:34:34,629 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:34:34,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_6.c[959,972] [2022-01-10 14:34:34,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:34:34,657 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:34:34,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34 WrapperNode [2022-01-10 14:34:34,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:34:34,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:34:34,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:34:34,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:34:34,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,686 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-01-10 14:34:34,687 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:34:34,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:34:34,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:34:34,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:34:34,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:34:34,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:34:34,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:34:34,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:34:34,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:34:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:34,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 14:34:34,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 14:34:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:34:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:34:34,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:34:34,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:34:34,789 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:34:34,790 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:34:34,880 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:34:34,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:34:34,884 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 14:34:34,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:34:34 BoogieIcfgContainer [2022-01-10 14:34:34,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:34:34,885 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:34:34,885 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:34:34,886 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:34:34,888 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:34:34" (1/1) ... [2022-01-10 14:34:34,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:34:34 BasicIcfg [2022-01-10 14:34:34,962 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:34:34,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:34:34,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:34:34,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:34:34,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:34:34" (1/4) ... [2022-01-10 14:34:34,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365e561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:34:34, skipping insertion in model container [2022-01-10 14:34:34,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:34:34" (2/4) ... [2022-01-10 14:34:34,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365e561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:34:34, skipping insertion in model container [2022-01-10 14:34:34,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:34:34" (3/4) ... [2022-01-10 14:34:34,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2365e561 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:34:34, skipping insertion in model container [2022-01-10 14:34:34,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:34:34" (4/4) ... [2022-01-10 14:34:34,969 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_6.cTransformedIcfg [2022-01-10 14:34:34,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:34:34,972 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 14:34:35,005 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:34:35,010 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 14:34:35,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 14:34:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-10 14:34:35,021 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-10 14:34:35,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,025 INFO L85 PathProgramCache]: Analyzing trace with hash 112639869, now seen corresponding path program 1 times [2022-01-10 14:34:35,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53109486] [2022-01-10 14:34:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53109486] [2022-01-10 14:34:35,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53109486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 14:34:35,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064110124] [2022-01-10 14:34:35,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 14:34:35,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 14:34:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 14:34:35,195 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-01-10 14:34:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,209 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2022-01-10 14:34:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 14:34:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-01-10 14:34:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,216 INFO L225 Difference]: With dead ends: 40 [2022-01-10 14:34:35,216 INFO L226 Difference]: Without dead ends: 17 [2022-01-10 14:34:35,219 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 [2022-01-10 14:34:35,222 INFO L933 BasicCegarLoop]: 26 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, 26 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 [2022-01-10 14:34:35,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-10 14:34:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-10 14:34:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-01-10 14:34:35,249 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 5 [2022-01-10 14:34:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,250 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-01-10 14:34:35,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2022-01-10 14:34:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-01-10 14:34:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-10 14:34:35,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-10 14:34:35,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:34:35,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 112640830, now seen corresponding path program 1 times [2022-01-10 14:34:35,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59453705] [2022-01-10 14:34:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59453705] [2022-01-10 14:34:35,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59453705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:35,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36846265] [2022-01-10 14:34:35,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:35,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,333 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-01-10 14:34:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,346 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-01-10 14:34:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-01-10 14:34:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,347 INFO L225 Difference]: With dead ends: 32 [2022-01-10 14:34:35,347 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 14:34:35,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,348 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:35,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 37 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 14:34:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2022-01-10 14:34:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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) [2022-01-10 14:34:35,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-01-10 14:34:35,352 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 5 [2022-01-10 14:34:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,353 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-01-10 14:34:35,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-01-10 14:34:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-01-10 14:34:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 14:34:35,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,353 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:35,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 14:34:35,354 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1345087873, now seen corresponding path program 1 times [2022-01-10 14:34:35,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678596615] [2022-01-10 14:34:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678596615] [2022-01-10 14:34:35,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678596615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:35,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810815064] [2022-01-10 14:34:35,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:35,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,410 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,422 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2022-01-10 14:34:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:35,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 14:34:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,423 INFO L225 Difference]: With dead ends: 43 [2022-01-10 14:34:35,423 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 14:34:35,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,424 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:35,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 14:34:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-01-10 14:34:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-01-10 14:34:35,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2022-01-10 14:34:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,428 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-01-10 14:34:35,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-01-10 14:34:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 14:34:35,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:35,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:34:35,429 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,429 INFO L85 PathProgramCache]: Analyzing trace with hash -876809103, now seen corresponding path program 1 times [2022-01-10 14:34:35,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164212648] [2022-01-10 14:34:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164212648] [2022-01-10 14:34:35,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164212648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:35,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195302473] [2022-01-10 14:34:35,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:35,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,482 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,492 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2022-01-10 14:34:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:35,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 14:34:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,493 INFO L225 Difference]: With dead ends: 43 [2022-01-10 14:34:35,493 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 14:34:35,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,494 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:35,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 14:34:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-01-10 14:34:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2022-01-10 14:34:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-01-10 14:34:35,497 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-01-10 14:34:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,497 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-01-10 14:34:35,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-01-10 14:34:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 14:34:35,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:35,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 14:34:35,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,499 INFO L85 PathProgramCache]: Analyzing trace with hash -260569388, now seen corresponding path program 1 times [2022-01-10 14:34:35,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183390939] [2022-01-10 14:34:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183390939] [2022-01-10 14:34:35,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183390939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:35,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900236473] [2022-01-10 14:34:35,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:35,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,550 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,560 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2022-01-10 14:34:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:35,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-10 14:34:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,561 INFO L225 Difference]: With dead ends: 43 [2022-01-10 14:34:35,561 INFO L226 Difference]: Without dead ends: 26 [2022-01-10 14:34:35,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,562 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:35,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-10 14:34:35,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-01-10 14:34:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2022-01-10 14:34:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-01-10 14:34:35,565 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2022-01-10 14:34:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,565 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-01-10 14:34:35,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-01-10 14:34:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 14:34:35,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:35,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 14:34:35,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,567 INFO L85 PathProgramCache]: Analyzing trace with hash 115055815, now seen corresponding path program 1 times [2022-01-10 14:34:35,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966075875] [2022-01-10 14:34:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966075875] [2022-01-10 14:34:35,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966075875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:35,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685049759] [2022-01-10 14:34:35,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:35,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,617 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-01-10 14:34:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,626 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-01-10 14:34:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 [2022-01-10 14:34:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,626 INFO L225 Difference]: With dead ends: 43 [2022-01-10 14:34:35,626 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 14:34:35,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,627 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:35,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 14:34:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-10 14:34:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-01-10 14:34:35,630 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-01-10 14:34:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,631 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-01-10 14:34:35,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2022-01-10 14:34:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-01-10 14:34:35,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 14:34:35,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:35,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 14:34:35,632 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2120832437, now seen corresponding path program 1 times [2022-01-10 14:34:35,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625285492] [2022-01-10 14:34:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625285492] [2022-01-10 14:34:35,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625285492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:34:35,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:34:35,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:34:35,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420262775] [2022-01-10 14:34:35,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:34:35,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:34:35,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:35,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:34:35,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,679 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:35,701 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-01-10 14:34:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:34:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-10 14:34:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:35,702 INFO L225 Difference]: With dead ends: 43 [2022-01-10 14:34:35,702 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 14:34:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:34:35,703 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:35,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:34:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 14:34:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-10 14:34:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-10 14:34:35,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-01-10 14:34:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:35,706 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-10 14:34:35,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-10 14:34:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 14:34:35,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:35,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:35,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 14:34:35,707 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1399302071, now seen corresponding path program 1 times [2022-01-10 14:34:35,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890763225] [2022-01-10 14:34:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:35,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890763225] [2022-01-10 14:34:35,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890763225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:35,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662732301] [2022-01-10 14:34:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:35,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:35,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:35,752 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) [2022-01-10 14:34:35,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 14:34:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-10 14:34:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:36,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 14:34:36,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662732301] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:36,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:36,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 10] total 19 [2022-01-10 14:34:36,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485418144] [2022-01-10 14:34:36,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:36,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 14:34:36,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 14:34:36,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-10 14:34:36,644 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:37,802 INFO L93 Difference]: Finished difference Result 140 states and 188 transitions. [2022-01-10 14:34:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-10 14:34:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-10 14:34:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:37,803 INFO L225 Difference]: With dead ends: 140 [2022-01-10 14:34:37,803 INFO L226 Difference]: Without dead ends: 109 [2022-01-10 14:34:37,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=362, Invalid=1120, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 14:34:37,805 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:37,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 63 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 14:34:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-10 14:34:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 29. [2022-01-10 14:34:37,810 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) [2022-01-10 14:34:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-10 14:34:37,811 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2022-01-10 14:34:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:37,811 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-10 14:34:37,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:34:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-10 14:34:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 14:34:37,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:37,812 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:34:37,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 14:34:38,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:38,028 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:38,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1392528061, now seen corresponding path program 2 times [2022-01-10 14:34:38,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:38,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002834557] [2022-01-10 14:34:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:38,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 14:34:38,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002834557] [2022-01-10 14:34:38,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002834557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728723862] [2022-01-10 14:34:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:34:38,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:38,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:38,128 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) [2022-01-10 14:34:38,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 14:34:38,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:34:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:34:38,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 14:34:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 14:34:38,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 14:34:38,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728723862] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:38,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:38,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2022-01-10 14:34:38,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047176605] [2022-01-10 14:34:38,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:38,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 14:34:38,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:38,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 14:34:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-10 14:34:38,413 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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) [2022-01-10 14:34:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:34:38,797 INFO L93 Difference]: Finished difference Result 211 states and 251 transitions. [2022-01-10 14:34:38,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 14:34:38,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 14:34:38,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:34:38,798 INFO L225 Difference]: With dead ends: 211 [2022-01-10 14:34:38,799 INFO L226 Difference]: Without dead ends: 185 [2022-01-10 14:34:38,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2022-01-10 14:34:38,800 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 303 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:34:38,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 132 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:34:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-10 14:34:38,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2022-01-10 14:34:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.177304964539007) internal successors, (166), 141 states have internal predecessors, (166), 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) [2022-01-10 14:34:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 166 transitions. [2022-01-10 14:34:38,834 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 166 transitions. Word has length 28 [2022-01-10 14:34:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:34:38,834 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 166 transitions. [2022-01-10 14:34:38,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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) [2022-01-10 14:34:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 166 transitions. [2022-01-10 14:34:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-10 14:34:38,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:34:38,840 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 14:34:38,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 14:34:39,057 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,SelfDestructingSolverStorable8 [2022-01-10 14:34:39,058 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:34:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:34:39,058 INFO L85 PathProgramCache]: Analyzing trace with hash -140032542, now seen corresponding path program 3 times [2022-01-10 14:34:39,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:34:39,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955036058] [2022-01-10 14:34:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:34:39,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:34:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:34:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 564 proven. 1 refuted. 0 times theorem prover too weak. 923 trivial. 0 not checked. [2022-01-10 14:34:39,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:34:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955036058] [2022-01-10 14:34:39,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955036058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:34:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462811707] [2022-01-10 14:34:39,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 14:34:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:34:39,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:34:39,264 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) [2022-01-10 14:34:39,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 14:34:39,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-01-10 14:34:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:34:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 14:34:39,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:34:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 342 proven. 16 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2022-01-10 14:34:46,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:34:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 342 proven. 16 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2022-01-10 14:34:46,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462811707] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:34:46,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:34:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 8] total 15 [2022-01-10 14:34:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546169984] [2022-01-10 14:34:46,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:34:46,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 14:34:46,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:34:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 14:34:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=154, Unknown=3, NotChecked=0, Total=210 [2022-01-10 14:34:46,915 INFO L87 Difference]: Start difference. First operand 142 states and 166 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 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) [2022-01-10 14:35:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:35:03,868 INFO L93 Difference]: Finished difference Result 468 states and 564 transitions. [2022-01-10 14:35:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 14:35:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 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) Word has length 141 [2022-01-10 14:35:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:35:03,869 INFO L225 Difference]: With dead ends: 468 [2022-01-10 14:35:03,870 INFO L226 Difference]: Without dead ends: 330 [2022-01-10 14:35:03,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=146, Invalid=443, Unknown=11, NotChecked=0, Total=600 [2022-01-10 14:35:03,883 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:35:03,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 159 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 79 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-01-10 14:35:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-01-10 14:35:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 306. [2022-01-10 14:35:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1213114754098361) internal successors, (342), 305 states have internal predecessors, (342), 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) [2022-01-10 14:35:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 342 transitions. [2022-01-10 14:35:03,942 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 342 transitions. Word has length 141 [2022-01-10 14:35:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:35:03,943 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 342 transitions. [2022-01-10 14:35:03,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 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) [2022-01-10 14:35:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 342 transitions. [2022-01-10 14:35:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-10 14:35:03,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:35:03,950 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 14:35:03,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 14:35:04,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:35:04,154 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:35:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:35:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash 390105022, now seen corresponding path program 4 times [2022-01-10 14:35:04,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:35:04,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76315114] [2022-01-10 14:35:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:35:04,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:35:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:35:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4301 proven. 1 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2022-01-10 14:35:04,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:35:04,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76315114] [2022-01-10 14:35:04,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76315114] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:35:04,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029137556] [2022-01-10 14:35:04,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 14:35:04,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:35:04,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:35:04,590 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) [2022-01-10 14:35:04,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 14:35:04,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 14:35:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:35:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 14:35:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:35:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4309 proven. 1 refuted. 0 times theorem prover too weak. 7040 trivial. 0 not checked. [2022-01-10 14:35:05,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:35:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4315 proven. 1 refuted. 0 times theorem prover too weak. 7034 trivial. 0 not checked. [2022-01-10 14:35:06,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029137556] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:35:06,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:35:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 11 [2022-01-10 14:35:06,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923952575] [2022-01-10 14:35:06,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:35:06,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 14:35:06,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:35:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 14:35:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-10 14:35:06,487 INFO L87 Difference]: Start difference. First operand 306 states and 342 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:35:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:35:07,418 INFO L93 Difference]: Finished difference Result 2416 states and 2693 transitions. [2022-01-10 14:35:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-10 14:35:07,418 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 305 [2022-01-10 14:35:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:35:07,427 INFO L225 Difference]: With dead ends: 2416 [2022-01-10 14:35:07,427 INFO L226 Difference]: Without dead ends: 2110 [2022-01-10 14:35:07,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2022-01-10 14:35:07,432 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 457 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:35:07,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 154 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:35:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2022-01-10 14:35:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1430. [2022-01-10 14:35:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 1.1091672498250524) internal successors, (1585), 1429 states have internal predecessors, (1585), 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) [2022-01-10 14:35:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 1585 transitions. [2022-01-10 14:35:07,693 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 1585 transitions. Word has length 305 [2022-01-10 14:35:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:35:07,693 INFO L470 AbstractCegarLoop]: Abstraction has 1430 states and 1585 transitions. [2022-01-10 14:35:07,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 14:35:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 1585 transitions. [2022-01-10 14:35:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1287 [2022-01-10 14:35:07,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:35:07,717 INFO L514 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 36, 36, 36, 18, 18, 18, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 14:35:07,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 14:35:07,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:35:07,934 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:35:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:35:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash 879567796, now seen corresponding path program 5 times [2022-01-10 14:35:07,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:35:07,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446272603] [2022-01-10 14:35:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:35:07,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:35:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:35:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 230881 backedges. 45741 proven. 1 refuted. 0 times theorem prover too weak. 185139 trivial. 0 not checked. [2022-01-10 14:35:18,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:35:18,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446272603] [2022-01-10 14:35:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446272603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:35:18,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487926040] [2022-01-10 14:35:18,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 14:35:18,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:35:18,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:35:18,330 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) [2022-01-10 14:35:18,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 14:35:32,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-01-10 14:35:32,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:35:32,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 14:35:32,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:35:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 230881 backedges. 74586 proven. 89 refuted. 0 times theorem prover too weak. 156206 trivial. 0 not checked. [2022-01-10 14:35:34,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:35:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 230881 backedges. 75286 proven. 141 refuted. 0 times theorem prover too weak. 155454 trivial. 0 not checked. [2022-01-10 14:35:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487926040] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:35:35,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:35:35,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 11 [2022-01-10 14:35:35,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343880299] [2022-01-10 14:35:35,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:35:35,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 14:35:35,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:35:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 14:35:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 14:35:35,865 INFO L87 Difference]: Start difference. First operand 1430 states and 1585 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 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) [2022-01-10 14:35:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:35:37,473 INFO L93 Difference]: Finished difference Result 4720 states and 5276 transitions. [2022-01-10 14:35:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 14:35:37,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 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 1286 [2022-01-10 14:35:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:35:37,505 INFO L225 Difference]: With dead ends: 4720 [2022-01-10 14:35:37,505 INFO L226 Difference]: Without dead ends: 3327 [2022-01-10 14:35:37,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2587 GetRequests, 2566 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-01-10 14:35:37,507 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 71 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 14:35:37,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 70 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-01-10 14:35:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2022-01-10 14:35:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3228. [2022-01-10 14:35:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 1.0852184691664084) internal successors, (3502), 3227 states have internal predecessors, (3502), 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) [2022-01-10 14:35:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 3502 transitions. [2022-01-10 14:35:38,118 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 3502 transitions. Word has length 1286 [2022-01-10 14:35:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:35:38,119 INFO L470 AbstractCegarLoop]: Abstraction has 3228 states and 3502 transitions. [2022-01-10 14:35:38,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 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) [2022-01-10 14:35:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 3502 transitions. [2022-01-10 14:35:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3228 [2022-01-10 14:35:38,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:35:38,199 INFO L514 BasicCegarLoop]: trace histogram [1200, 1200, 200, 200, 200, 40, 40, 40, 20, 20, 20, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1] [2022-01-10 14:35:38,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 14:35:38,408 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,SelfDestructingSolverStorable11 [2022-01-10 14:35:38,408 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:35:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:35:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -246778626, now seen corresponding path program 6 times [2022-01-10 14:35:38,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:35:38,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137417234] [2022-01-10 14:35:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:35:38,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms