/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/array-fpi/s1if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 15:47:49,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 15:47:49,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 15:47:49,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 15:47:49,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 15:47:49,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 15:47:49,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 15:47:49,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 15:47:49,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 15:47:49,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 15:47:49,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 15:47:49,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 15:47:49,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 15:47:49,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 15:47:49,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 15:47:49,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 15:47:49,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 15:47:49,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 15:47:49,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 15:47:49,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 15:47:49,762 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 15:47:49,787 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 15:47:49,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 15:47:49,788 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 15:47:49,788 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 15:47:49,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 15:47:49,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 15:47:49,789 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 15:47:49,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 15:47:49,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 15:47:49,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 15:47:49,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 15:47:49,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:47:49,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 15:47:49,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 15:47:49,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 15:47:49,792 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 15:47:49,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 15:47:50,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 15:47:50,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 15:47:50,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 15:47:50,028 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 15:47:50,028 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 15:47:50,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s1if.c [2022-01-10 15:47:50,077 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b2dea4c/7b6ec01491804c14a64f712efe58183d/FLAGf54e77efc [2022-01-10 15:47:50,403 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 15:47:50,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1if.c [2022-01-10 15:47:50,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b2dea4c/7b6ec01491804c14a64f712efe58183d/FLAGf54e77efc [2022-01-10 15:47:50,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32b2dea4c/7b6ec01491804c14a64f712efe58183d [2022-01-10 15:47:50,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 15:47:50,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 15:47:50,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 15:47:50,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 15:47:50,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 15:47:50,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:47:50" (1/1) ... [2022-01-10 15:47:50,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b5bbdef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:50, skipping insertion in model container [2022-01-10 15:47:50,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:47:50" (1/1) ... [2022-01-10 15:47:50,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 15:47:50,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 15:47:51,035 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1if.c[587,600] [2022-01-10 15:47:51,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:47:51,064 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 15:47:51,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s1if.c[587,600] [2022-01-10 15:47:51,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:47:51,087 INFO L208 MainTranslator]: Completed translation [2022-01-10 15:47:51,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51 WrapperNode [2022-01-10 15:47:51,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 15:47:51,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 15:47:51,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 15:47:51,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 15:47:51,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,130 INFO L137 Inliner]: procedures = 19, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-01-10 15:47:51,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 15:47:51,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 15:47:51,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 15:47:51,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 15:47:51,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 15:47:51,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 15:47:51,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 15:47:51,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 15:47:51,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:47:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:47:51,207 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 15:47:51,214 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 15:47:51,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 15:47:51,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 15:47:51,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 15:47:51,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 15:47:51,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 15:47:51,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 15:47:51,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 15:47:51,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 15:47:51,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 15:47:51,317 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 15:47:51,318 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 15:47:51,480 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 15:47:51,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 15:47:51,484 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-10 15:47:51,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:47:51 BoogieIcfgContainer [2022-01-10 15:47:51,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 15:47:51,486 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 15:47:51,486 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 15:47:51,492 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 15:47:51,495 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:47:51" (1/1) ... [2022-01-10 15:47:51,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:47:51 BasicIcfg [2022-01-10 15:47:51,637 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 15:47:51,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 15:47:51,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 15:47:51,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 15:47:51,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:47:50" (1/4) ... [2022-01-10 15:47:51,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9d132f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:47:51, skipping insertion in model container [2022-01-10 15:47:51,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:47:51" (2/4) ... [2022-01-10 15:47:51,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9d132f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:47:51, skipping insertion in model container [2022-01-10 15:47:51,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:47:51" (3/4) ... [2022-01-10 15:47:51,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9d132f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:47:51, skipping insertion in model container [2022-01-10 15:47:51,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:47:51" (4/4) ... [2022-01-10 15:47:51,642 INFO L111 eAbstractionObserver]: Analyzing ICFG s1if.cTransformedIcfg [2022-01-10 15:47:51,645 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 15:47:51,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 15:47:51,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 15:47:51,680 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 15:47:51,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 15:47:51,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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 15:47:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 15:47:51,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:47:51,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:47:51,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:47:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:47:51,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1120674602, now seen corresponding path program 1 times [2022-01-10 15:47:51,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:47:51,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500370035] [2022-01-10 15:47:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:47:51,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:47:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:47:51,842 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 15:47:51,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:47:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500370035] [2022-01-10 15:47:51,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500370035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:47:51,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:47:51,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:47:51,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519940355] [2022-01-10 15:47:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:47:51,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 15:47:51,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:47:51,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 15:47:51,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 15:47:51,873 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:47:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:47:51,884 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-01-10 15:47:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 15:47:51,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-10 15:47:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:47:51,890 INFO L225 Difference]: With dead ends: 34 [2022-01-10 15:47:51,890 INFO L226 Difference]: Without dead ends: 15 [2022-01-10 15:47:51,892 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 15:47:51,895 INFO L933 BasicCegarLoop]: 22 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, 22 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 15:47:51,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 15:47:51,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-10 15:47:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-10 15:47:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 15:47:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-01-10 15:47:51,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-01-10 15:47:51,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:47:51,917 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-01-10 15:47:51,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:47:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-01-10 15:47:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 15:47:51,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:47:51,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:47:51,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 15:47:51,920 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:47:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:47:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1402823417, now seen corresponding path program 1 times [2022-01-10 15:47:51,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:47:51,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980710458] [2022-01-10 15:47:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:47:51,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:47:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:47:52,096 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 15:47:52,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:47:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980710458] [2022-01-10 15:47:52,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980710458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:47:52,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:47:52,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 15:47:52,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071574513] [2022-01-10 15:47:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:47:52,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 15:47:52,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:47:52,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 15:47:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 15:47:52,100 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 15:47:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:47:52,184 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-01-10 15:47:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 15:47:52,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 15:47:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:47:52,186 INFO L225 Difference]: With dead ends: 28 [2022-01-10 15:47:52,186 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 15:47:52,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 15:47:52,187 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:47:52,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 15:47:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 15:47:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-01-10 15:47:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 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 15:47:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 15:47:52,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-10 15:47:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:47:52,198 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 15:47:52,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 15:47:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 15:47:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 15:47:52,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:47:52,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:47:52,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 15:47:52,199 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:47:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:47:52,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2086965841, now seen corresponding path program 1 times [2022-01-10 15:47:52,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:47:52,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994900033] [2022-01-10 15:47:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:47:52,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:47:52,252 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 15:47:52,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337780618] [2022-01-10 15:47:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:47:52,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:47:52,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:47:52,265 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 15:47:52,266 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 15:47:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:47:52,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 15:47:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:47:52,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-10 15:47:52,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-10 15:47:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:47:52,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:47:52,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-10 15:47:52,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-01-10 15:47:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:47:52,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:47:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994900033] [2022-01-10 15:47:52,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 15:47:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337780618] [2022-01-10 15:47:52,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337780618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:47:52,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 15:47:52,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2022-01-10 15:47:52,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714702224] [2022-01-10 15:47:52,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 15:47:52,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 15:47:52,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:47:52,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 15:47:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-10 15:47:52,761 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 15:47:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:47:53,019 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-01-10 15:47:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 15:47:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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) Word has length 16 [2022-01-10 15:47:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:47:53,020 INFO L225 Difference]: With dead ends: 27 [2022-01-10 15:47:53,020 INFO L226 Difference]: Without dead ends: 20 [2022-01-10 15:47:53,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-01-10 15:47:53,021 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:47:53,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 34 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 15:47:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-10 15:47:53,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-01-10 15:47:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 15:47:53,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-01-10 15:47:53,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2022-01-10 15:47:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:47:53,025 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-01-10 15:47:53,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 15:47:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-01-10 15:47:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 15:47:53,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:47:53,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:47:53,043 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 15:47:53,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:47:53,244 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:47:53,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:47:53,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2058336690, now seen corresponding path program 1 times [2022-01-10 15:47:53,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:47:53,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050691555] [2022-01-10 15:47:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:47:53,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:47:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:47:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:47:53,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:47:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050691555] [2022-01-10 15:47:53,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050691555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:47:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766158144] [2022-01-10 15:47:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:47:53,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:47:53,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:47:53,940 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 15:47:53,941 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 15:47:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:47:54,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-10 15:47:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:47:54,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 15:47:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:47:54,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:47:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:47:54,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2022-01-10 15:47:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:47:54,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 45 [2022-01-10 15:47:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:47:55,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:48:01,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 15:48:01,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-01-10 15:48:01,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 15:48:01,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-01-10 15:48:01,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-01-10 15:48:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:01,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766158144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:48:01,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:48:01,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-01-10 15:48:01,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374937022] [2022-01-10 15:48:01,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:48:01,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 15:48:01,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:48:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 15:48:01,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=552, Unknown=3, NotChecked=0, Total=702 [2022-01-10 15:48:01,600 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:48:01,889 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-10 15:48:01,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 15:48:01,891 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 15:48:01,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:48:01,891 INFO L225 Difference]: With dead ends: 32 [2022-01-10 15:48:01,891 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 15:48:01,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=162, Invalid=591, Unknown=3, NotChecked=0, Total=756 [2022-01-10 15:48:01,892 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 15:48:01,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 65 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-01-10 15:48:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 15:48:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-10 15:48:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 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 15:48:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-10 15:48:01,897 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-01-10 15:48:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:48:01,897 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-10 15:48:01,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-10 15:48:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-10 15:48:01,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:48:01,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:48:01,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 15:48:02,098 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,SelfDestructingSolverStorable3 [2022-01-10 15:48:02,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:48:02,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:48:02,099 INFO L85 PathProgramCache]: Analyzing trace with hash -168699024, now seen corresponding path program 2 times [2022-01-10 15:48:02,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:48:02,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913110005] [2022-01-10 15:48:02,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:02,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:48:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:48:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:02,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:48:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913110005] [2022-01-10 15:48:02,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913110005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:48:02,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949628244] [2022-01-10 15:48:02,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 15:48:02,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:02,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:48:02,246 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 15:48:02,265 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 15:48:02,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 15:48:02,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:48:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 15:48:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:48:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:02,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:48:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:02,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949628244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:48:02,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:48:02,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-10 15:48:02,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090122190] [2022-01-10 15:48:02,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:48:02,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 15:48:02,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:48:02,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 15:48:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-01-10 15:48:02,642 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:48:02,898 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-01-10 15:48:02,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 15:48:02,899 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-10 15:48:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:48:02,900 INFO L225 Difference]: With dead ends: 41 [2022-01-10 15:48:02,900 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 15:48:02,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-10 15:48:02,900 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 15:48:02,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 35 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 15:48:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 15:48:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 20. [2022-01-10 15:48:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-10 15:48:02,905 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2022-01-10 15:48:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:48:02,905 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-10 15:48:02,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-10 15:48:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-10 15:48:02,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:48:02,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:48:02,927 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 15:48:03,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:03,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:48:03,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:48:03,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1606695048, now seen corresponding path program 1 times [2022-01-10 15:48:03,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:48:03,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379887419] [2022-01-10 15:48:03,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:03,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:48:03,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 15:48:03,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804053807] [2022-01-10 15:48:03,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:03,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:03,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:48:03,148 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 15:48:03,153 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 15:48:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:48:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 15:48:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:48:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:03,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:48:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:03,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:48:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379887419] [2022-01-10 15:48:03,453 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 15:48:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804053807] [2022-01-10 15:48:03,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804053807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:48:03,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 15:48:03,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-10 15:48:03,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070736852] [2022-01-10 15:48:03,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 15:48:03,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 15:48:03,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:48:03,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 15:48:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 15:48:03,454 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 15:48:03,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:48:03,577 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-10 15:48:03,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 15:48:03,578 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-10 15:48:03,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:48:03,578 INFO L225 Difference]: With dead ends: 37 [2022-01-10 15:48:03,578 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 15:48:03,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-10 15:48:03,579 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:48:03,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 15:48:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 15:48:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-01-10 15:48:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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 15:48:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-10 15:48:03,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2022-01-10 15:48:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:48:03,583 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-10 15:48:03,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 15:48:03,584 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-10 15:48:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 15:48:03,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:48:03,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:48:03,606 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 15:48:03,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:03,802 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:48:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:48:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 345560586, now seen corresponding path program 2 times [2022-01-10 15:48:03,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:48:03,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984300382] [2022-01-10 15:48:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:03,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:48:03,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 15:48:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034340721] [2022-01-10 15:48:03,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 15:48:03,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:03,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:48:03,848 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 15:48:03,867 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 15:48:04,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 15:48:04,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:48:04,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-10 15:48:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:48:04,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 15:48:04,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:04,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-10 15:48:04,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 15:48:04,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 15:48:04,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 10 [2022-01-10 15:48:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:04,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:48:04,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 15:48:04,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-01-10 15:48:04,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 15:48:04,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 54 [2022-01-10 15:48:04,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-01-10 15:48:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:05,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:48:05,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984300382] [2022-01-10 15:48:05,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 15:48:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034340721] [2022-01-10 15:48:05,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034340721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:48:05,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 15:48:05,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-01-10 15:48:05,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258905766] [2022-01-10 15:48:05,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 15:48:05,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 15:48:05,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:48:05,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 15:48:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=269, Unknown=1, NotChecked=0, Total=342 [2022-01-10 15:48:05,733 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 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 15:48:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:48:11,308 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-10 15:48:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 15:48:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 15:48:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:48:11,309 INFO L225 Difference]: With dead ends: 32 [2022-01-10 15:48:11,309 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 15:48:11,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=138, Invalid=461, Unknown=1, NotChecked=0, Total=600 [2022-01-10 15:48:11,310 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 15:48:11,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 159 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-01-10 15:48:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 15:48:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-10 15:48:11,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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 15:48:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-01-10 15:48:11,315 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2022-01-10 15:48:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:48:11,316 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-01-10 15:48:11,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 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 15:48:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-01-10 15:48:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 15:48:11,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:48:11,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:48:11,340 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 15:48:11,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:11,524 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:48:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:48:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 316931435, now seen corresponding path program 3 times [2022-01-10 15:48:11,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:48:11,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194525202] [2022-01-10 15:48:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:11,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:48:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:48:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:12,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:48:12,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194525202] [2022-01-10 15:48:12,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194525202] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:48:12,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479008892] [2022-01-10 15:48:12,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 15:48:12,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:48:12,362 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 15:48:12,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 15:48:12,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-10 15:48:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:48:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-10 15:48:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:48:12,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 15:48:12,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:12,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:48:12,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:12,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:48:13,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:13,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2022-01-10 15:48:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:13,523 INFO L353 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-01-10 15:48:13,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 55 [2022-01-10 15:48:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:13,934 INFO L353 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-01-10 15:48:13,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 46 [2022-01-10 15:48:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:13,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:48:20,969 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-10 15:48:20,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 1 [2022-01-10 15:48:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:20,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479008892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:48:20,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 15:48:20,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 16] total 42 [2022-01-10 15:48:20,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001158834] [2022-01-10 15:48:20,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 15:48:20,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-10 15:48:20,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:48:20,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-10 15:48:20,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1499, Unknown=5, NotChecked=0, Total=1722 [2022-01-10 15:48:20,978 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:36,489 WARN L228 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 15:48:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:48:39,316 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-10 15:48:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-10 15:48:39,317 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 15:48:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:48:39,318 INFO L225 Difference]: With dead ends: 42 [2022-01-10 15:48:39,318 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 15:48:39,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=546, Invalid=3350, Unknown=10, NotChecked=0, Total=3906 [2022-01-10 15:48:39,320 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 15:48:39,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 56 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 248 Invalid, 0 Unknown, 149 Unchecked, 1.6s Time] [2022-01-10 15:48:39,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 15:48:39,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-01-10 15:48:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:39,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-01-10 15:48:39,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-01-10 15:48:39,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:48:39,327 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-01-10 15:48:39,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-01-10 15:48:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 15:48:39,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:48:39,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:48:39,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 15:48:39,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:39,533 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:48:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:48:39,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1982255569, now seen corresponding path program 3 times [2022-01-10 15:48:39,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:48:39,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258690410] [2022-01-10 15:48:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:39,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:48:39,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 15:48:39,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628207616] [2022-01-10 15:48:39,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 15:48:39,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:39,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:48:39,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 15:48:39,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 15:48:40,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 15:48:40,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:48:40,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-10 15:48:40,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:48:40,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 15:48:40,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:40,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:48:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:40,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:48:40,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:40,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 41 [2022-01-10 15:48:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:41,058 INFO L353 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-01-10 15:48:41,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 58 [2022-01-10 15:48:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:41,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:48:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:47,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:48:47,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258690410] [2022-01-10 15:48:47,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-10 15:48:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628207616] [2022-01-10 15:48:47,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628207616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 15:48:47,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 15:48:47,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2022-01-10 15:48:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881017700] [2022-01-10 15:48:47,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 15:48:47,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-10 15:48:47,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:48:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-10 15:48:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=629, Unknown=1, NotChecked=0, Total=812 [2022-01-10 15:48:47,085 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:48:47,844 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-10 15:48:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 15:48:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 15:48:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:48:47,845 INFO L225 Difference]: With dead ends: 43 [2022-01-10 15:48:47,845 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 15:48:47,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=206, Invalid=723, Unknown=1, NotChecked=0, Total=930 [2022-01-10 15:48:47,846 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 15:48:47,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 180 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-01-10 15:48:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 15:48:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-10 15:48:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:47,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-10 15:48:47,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-01-10 15:48:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:48:47,854 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-10 15:48:47,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 15:48:47,854 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-10 15:48:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 15:48:47,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:48:47,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:48:47,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-10 15:48:48,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:48,055 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:48:48,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:48:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2144030227, now seen corresponding path program 4 times [2022-01-10 15:48:48,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:48:48,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45659449] [2022-01-10 15:48:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:48:48,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:48:48,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-10 15:48:48,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495318404] [2022-01-10 15:48:48,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 15:48:48,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:48:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:48:48,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 15:48:48,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 15:48:48,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 15:48:48,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 15:48:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-10 15:48:48,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:48:48,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 15:48:48,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:48,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:48:48,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:48,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-10 15:48:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:48,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-01-10 15:48:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:49,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 55 [2022-01-10 15:48:49,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:49,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2022-01-10 15:48:49,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-01-10 15:48:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:49,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 15:48:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:49,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 15:48:49,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 15:48:49,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 16 [2022-01-10 15:48:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:48:49,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 15:49:06,993 INFO L353 Elim1Store]: treesize reduction 38, result has 64.8 percent of original size [2022-01-10 15:49:06,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 416 treesize of output 288