/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/recursive-simple/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 18:22:21,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 18:22:21,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 18:22:21,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 18:22:21,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 18:22:21,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 18:22:21,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 18:22:21,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 18:22:21,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 18:22:21,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 18:22:21,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 18:22:21,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 18:22:21,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 18:22:21,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 18:22:21,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 18:22:21,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 18:22:21,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 18:22:21,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 18:22:21,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 18:22:21,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 18:22:21,458 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 18:22:21,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 18:22:21,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 18:22:21,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 18:22:21,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 18:22:21,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 18:22:21,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 18:22:21,492 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 18:22:21,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 18:22:21,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 18:22:21,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 18:22:21,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 18:22:21,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 18:22:21,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 18:22:21,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:21,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 18:22:21,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 18:22:21,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 18:22:21,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 18:22:21,495 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 18:22:21,495 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 18:22:21,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 18:22:21,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 18:22:21,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 18:22:21,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 18:22:21,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 18:22:21,722 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 18:22:21,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2022-01-10 18:22:21,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50597c08/51393122736d476f9f93ed052a586f6a/FLAGb1c76433f [2022-01-10 18:22:22,168 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 18:22:22,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2022-01-10 18:22:22,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50597c08/51393122736d476f9f93ed052a586f6a/FLAGb1c76433f [2022-01-10 18:22:22,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50597c08/51393122736d476f9f93ed052a586f6a [2022-01-10 18:22:22,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 18:22:22,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 18:22:22,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:22,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 18:22:22,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 18:22:22,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1656d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22, skipping insertion in model container [2022-01-10 18:22:22,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 18:22:22,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 18:22:22,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-01-10 18:22:22,387 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:22,393 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 18:22:22,402 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c[946,959] [2022-01-10 18:22:22,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 18:22:22,410 INFO L208 MainTranslator]: Completed translation [2022-01-10 18:22:22,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22 WrapperNode [2022-01-10 18:22:22,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 18:22:22,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:22,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 18:22:22,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 18:22:22,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,428 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-10 18:22:22,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 18:22:22,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 18:22:22,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 18:22:22,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 18:22:22,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 18:22:22,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 18:22:22,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 18:22:22,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 18:22:22,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 18:22:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:22,462 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 18:22:22,466 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 18:22:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 18:22:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 18:22:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-01-10 18:22:22,483 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-01-10 18:22:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-01-10 18:22:22,483 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-01-10 18:22:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 18:22:22,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 18:22:22,521 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 18:22:22,522 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 18:22:22,610 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 18:22:22,614 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 18:22:22,614 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 18:22:22,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:22 BoogieIcfgContainer [2022-01-10 18:22:22,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 18:22:22,615 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 18:22:22,615 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 18:22:22,616 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 18:22:22,618 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:22" (1/1) ... [2022-01-10 18:22:22,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:22:22 BasicIcfg [2022-01-10 18:22:22,683 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 18:22:22,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 18:22:22,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 18:22:22,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 18:22:22,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:22:22" (1/4) ... [2022-01-10 18:22:22,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4debaaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:22:22, skipping insertion in model container [2022-01-10 18:22:22,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:22:22" (2/4) ... [2022-01-10 18:22:22,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4debaaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:22:22, skipping insertion in model container [2022-01-10 18:22:22,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:22:22" (3/4) ... [2022-01-10 18:22:22,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4debaaa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 06:22:22, skipping insertion in model container [2022-01-10 18:22:22,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 06:22:22" (4/4) ... [2022-01-10 18:22:22,706 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.cTransformedIcfg [2022-01-10 18:22:22,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 18:22:22,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 18:22:22,754 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 18:22:22,762 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 18:22:22,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 18:22:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-10 18:22:22,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 18:22:22,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:22,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:22,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:22,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:22,781 INFO L85 PathProgramCache]: Analyzing trace with hash 409070419, now seen corresponding path program 1 times [2022-01-10 18:22:22,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:22,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559698495] [2022-01-10 18:22:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:22,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:22,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:22,972 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 18:22:22,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559698495] [2022-01-10 18:22:22,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559698495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:22,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:22:22,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:22:22,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727330662] [2022-01-10 18:22:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:22,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:22:22,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:22:23,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:22:23,010 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:23,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:23,082 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-01-10 18:22:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:22:23,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-01-10 18:22:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:23,089 INFO L225 Difference]: With dead ends: 37 [2022-01-10 18:22:23,089 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 18:22:23,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:22:23,093 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:23,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 82 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:22:23,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 18:22:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 18:22:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 18:22:23,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:22:23,120 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 10 [2022-01-10 18:22:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:23,121 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:22:23,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:22:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-10 18:22:23,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:23,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:23,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 18:22:23,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:23,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:23,123 INFO L85 PathProgramCache]: Analyzing trace with hash 697486659, now seen corresponding path program 1 times [2022-01-10 18:22:23,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:23,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125874400] [2022-01-10 18:22:23,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:23,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,174 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 18:22:23,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125874400] [2022-01-10 18:22:23,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125874400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:23,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 18:22:23,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 18:22:23,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834073188] [2022-01-10 18:22:23,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:23,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 18:22:23,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:23,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 18:22:23,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 18:22:23,177 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:23,216 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-01-10 18:22:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 18:22:23,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-10 18:22:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:23,217 INFO L225 Difference]: With dead ends: 31 [2022-01-10 18:22:23,217 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 18:22:23,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 18:22:23,219 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:23,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 72 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 18:22:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 18:22:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-10 18:22:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-10 18:22:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 18:22:23,224 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 11 [2022-01-10 18:22:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:23,224 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 18:22:23,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-10 18:22:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 18:22:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 18:22:23,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:23,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:23,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 18:22:23,226 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash 63510830, now seen corresponding path program 1 times [2022-01-10 18:22:23,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:23,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632186806] [2022-01-10 18:22:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:23,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:23,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632186806] [2022-01-10 18:22:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632186806] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259677863] [2022-01-10 18:22:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:23,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:23,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:23,520 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 18:22:23,551 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 18:22:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:23,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 18:22:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:23,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:24,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259677863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:24,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:24,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-10 18:22:24,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818717431] [2022-01-10 18:22:24,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:24,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 18:22:24,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 18:22:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-01-10 18:22:24,308 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 18:22:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:24,488 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-01-10 18:22:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 18:22:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-01-10 18:22:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:24,490 INFO L225 Difference]: With dead ends: 37 [2022-01-10 18:22:24,490 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 18:22:24,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-10 18:22:24,491 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:24,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 97 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:22:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 18:22:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-10 18:22:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-10 18:22:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-01-10 18:22:24,497 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 22 [2022-01-10 18:22:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:24,497 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-01-10 18:22:24,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 18:22:24,498 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-01-10 18:22:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 18:22:24,498 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:24,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:24,535 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 18:22:24,715 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 18:22:24,715 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:24,716 INFO L85 PathProgramCache]: Analyzing trace with hash -992157507, now seen corresponding path program 1 times [2022-01-10 18:22:24,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:24,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722982736] [2022-01-10 18:22:24,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:24,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:24,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:24,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:24,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:24,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:24,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722982736] [2022-01-10 18:22:24,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722982736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:24,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378015779] [2022-01-10 18:22:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:24,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:24,936 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 18:22:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,003 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 18:22:25,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:22:25,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:25,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 18:22:25,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378015779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:25,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:25,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-01-10 18:22:25,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986300504] [2022-01-10 18:22:25,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:25,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-10 18:22:25,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-10 18:22:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-10 18:22:25,333 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 18:22:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:25,454 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2022-01-10 18:22:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:22:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2022-01-10 18:22:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:25,455 INFO L225 Difference]: With dead ends: 63 [2022-01-10 18:22:25,455 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 18:22:25,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-10 18:22:25,457 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:25,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 101 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:22:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 18:22:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-01-10 18:22:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-01-10 18:22:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-01-10 18:22:25,472 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 23 [2022-01-10 18:22:25,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:25,472 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-01-10 18:22:25,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.7) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-10 18:22:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-01-10 18:22:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-10 18:22:25,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:25,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:25,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 18:22:25,674 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 18:22:25,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1662558092, now seen corresponding path program 1 times [2022-01-10 18:22:25,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:25,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108718645] [2022-01-10 18:22:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:25,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:22:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:25,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:25,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108718645] [2022-01-10 18:22:25,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108718645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:25,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041861769] [2022-01-10 18:22:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:25,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:25,876 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 18:22:25,877 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 18:22:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-10 18:22:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:22:26,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 18:22:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041861769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 18:22:26,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 18:22:26,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 15 [2022-01-10 18:22:26,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924910085] [2022-01-10 18:22:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 18:22:26,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 18:22:26,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:26,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 18:22:26,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-10 18:22:26,101 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 18:22:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:26,187 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2022-01-10 18:22:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 18:22:26,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) Word has length 34 [2022-01-10 18:22:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:26,188 INFO L225 Difference]: With dead ends: 63 [2022-01-10 18:22:26,189 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 18:22:26,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-01-10 18:22:26,190 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:26,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 18:22:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 18:22:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-10 18:22:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.2) internal successors, (24), 23 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (17), 8 states have call predecessors, (17), 7 states have call successors, (17) [2022-01-10 18:22:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2022-01-10 18:22:26,195 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 34 [2022-01-10 18:22:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:26,195 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2022-01-10 18:22:26,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.5) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-10 18:22:26,196 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2022-01-10 18:22:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 18:22:26,196 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:26,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:26,217 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 18:22:26,397 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 18:22:26,397 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:26,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1759393138, now seen corresponding path program 1 times [2022-01-10 18:22:26,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:26,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003416953] [2022-01-10 18:22:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:26,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:22:26,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003416953] [2022-01-10 18:22:26,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003416953] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:26,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095592701] [2022-01-10 18:22:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:26,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:26,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:26,550 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 18:22:26,574 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 18:22:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:26,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 18:22:26,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 18:22:27,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095592701] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:27,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:27,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 19 [2022-01-10 18:22:27,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531132486] [2022-01-10 18:22:27,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:27,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 18:22:27,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:27,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 18:22:27,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-10 18:22:27,222 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 18:22:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:27,623 INFO L93 Difference]: Finished difference Result 97 states and 166 transitions. [2022-01-10 18:22:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:22:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) Word has length 35 [2022-01-10 18:22:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:27,625 INFO L225 Difference]: With dead ends: 97 [2022-01-10 18:22:27,625 INFO L226 Difference]: Without dead ends: 56 [2022-01-10 18:22:27,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-01-10 18:22:27,626 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:27,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 206 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 18:22:27,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-10 18:22:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-01-10 18:22:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 34 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 10 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2022-01-10 18:22:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2022-01-10 18:22:27,633 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 35 [2022-01-10 18:22:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:27,633 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2022-01-10 18:22:27,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 17 states have internal predecessors, (43), 12 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (14), 8 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-10 18:22:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2022-01-10 18:22:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 18:22:27,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:27,635 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:27,665 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 18:22:27,863 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 18:22:27,864 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:27,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1567662105, now seen corresponding path program 2 times [2022-01-10 18:22:27,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:27,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10670075] [2022-01-10 18:22:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:27,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:27,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:28,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:22:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:28,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 18:22:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:28,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-10 18:22:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 18:22:28,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10670075] [2022-01-10 18:22:28,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10670075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991083094] [2022-01-10 18:22:28,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:22:28,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:28,218 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 18:22:28,239 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 18:22:28,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:22:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:22:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:22:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 18:22:29,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 18:22:31,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991083094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:31,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:31,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-01-10 18:22:31,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450907700] [2022-01-10 18:22:31,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:31,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 18:22:31,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:31,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 18:22:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-01-10 18:22:31,876 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-10 18:22:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:33,796 INFO L93 Difference]: Finished difference Result 112 states and 170 transitions. [2022-01-10 18:22:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 18:22:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) Word has length 46 [2022-01-10 18:22:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:33,798 INFO L225 Difference]: With dead ends: 112 [2022-01-10 18:22:33,798 INFO L226 Difference]: Without dead ends: 63 [2022-01-10 18:22:33,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-01-10 18:22:33,802 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:33,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 263 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 18:22:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-10 18:22:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-01-10 18:22:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (25), 14 states have call predecessors, (25), 10 states have call successors, (25) [2022-01-10 18:22:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2022-01-10 18:22:33,808 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 46 [2022-01-10 18:22:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:33,808 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2022-01-10 18:22:33,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 27 states have internal predecessors, (53), 12 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (18), 9 states have call predecessors, (18), 12 states have call successors, (18) [2022-01-10 18:22:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2022-01-10 18:22:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-10 18:22:33,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:33,810 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:33,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-10 18:22:34,013 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 18:22:34,014 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:34,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:34,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2052768956, now seen corresponding path program 1 times [2022-01-10 18:22:34,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:34,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62696365] [2022-01-10 18:22:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:34,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:22:34,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:34,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62696365] [2022-01-10 18:22:34,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62696365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:34,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344716677] [2022-01-10 18:22:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:34,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:34,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:34,136 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 18:22:34,150 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 18:22:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:34,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 18:22:34,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 18:22:34,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 18:22:34,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344716677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:34,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:34,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2022-01-10 18:22:34,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669169321] [2022-01-10 18:22:34,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:34,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-10 18:22:34,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:34,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-10 18:22:34,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-10 18:22:34,781 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:22:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:35,083 INFO L93 Difference]: Finished difference Result 130 states and 203 transitions. [2022-01-10 18:22:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 18:22:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 48 [2022-01-10 18:22:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:35,085 INFO L225 Difference]: With dead ends: 130 [2022-01-10 18:22:35,085 INFO L226 Difference]: Without dead ends: 78 [2022-01-10 18:22:35,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-10 18:22:35,086 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:35,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 253 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 18:22:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-10 18:22:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-01-10 18:22:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 13 states have call successors, (13), 6 states have call predecessors, (13), 14 states have return successors, (41), 20 states have call predecessors, (41), 13 states have call successors, (41) [2022-01-10 18:22:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 105 transitions. [2022-01-10 18:22:35,095 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 105 transitions. Word has length 48 [2022-01-10 18:22:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:35,095 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 105 transitions. [2022-01-10 18:22:35,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (16), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-10 18:22:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 105 transitions. [2022-01-10 18:22:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 18:22:35,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:35,097 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:35,129 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 18:22:35,297 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 18:22:35,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1457684086, now seen corresponding path program 1 times [2022-01-10 18:22:35,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:35,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621371262] [2022-01-10 18:22:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:35,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 18:22:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-01-10 18:22:35,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621371262] [2022-01-10 18:22:35,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621371262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474071264] [2022-01-10 18:22:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:35,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:35,679 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 18:22:35,680 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 18:22:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:35,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 18:22:35,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 18:22:35,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 18:22:36,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474071264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:36,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:36,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 24 [2022-01-10 18:22:36,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126358104] [2022-01-10 18:22:36,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:36,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 18:22:36,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 18:22:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-10 18:22:36,387 INFO L87 Difference]: Start difference. First operand 73 states and 105 transitions. Second operand has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-10 18:22:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:37,147 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2022-01-10 18:22:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 18:22:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) Word has length 60 [2022-01-10 18:22:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:37,154 INFO L225 Difference]: With dead ends: 194 [2022-01-10 18:22:37,154 INFO L226 Difference]: Without dead ends: 118 [2022-01-10 18:22:37,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 18:22:37,156 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:37,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 258 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 18:22:37,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-10 18:22:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2022-01-10 18:22:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 16 states have call successors, (16), 8 states have call predecessors, (16), 19 states have return successors, (54), 26 states have call predecessors, (54), 16 states have call successors, (54) [2022-01-10 18:22:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2022-01-10 18:22:37,168 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 60 [2022-01-10 18:22:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:37,168 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2022-01-10 18:22:37,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 21 states have internal predecessors, (50), 10 states have call successors, (16), 1 states have call predecessors, (16), 9 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-10 18:22:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2022-01-10 18:22:37,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 18:22:37,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:37,172 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:37,192 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 18:22:37,379 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 18:22:37,379 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash -678201443, now seen corresponding path program 1 times [2022-01-10 18:22:37,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253811945] [2022-01-10 18:22:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:37,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:37,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-10 18:22:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:37,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 97 proven. 152 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-01-10 18:22:38,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:38,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253811945] [2022-01-10 18:22:38,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253811945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:38,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683059234] [2022-01-10 18:22:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:38,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:38,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:38,016 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 18:22:38,025 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 18:22:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:38,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 18:22:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 129 proven. 32 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-01-10 18:22:38,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 129 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-01-10 18:22:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683059234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:39,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 11] total 31 [2022-01-10 18:22:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385649843] [2022-01-10 18:22:39,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-10 18:22:39,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-10 18:22:39,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-01-10 18:22:39,222 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-10 18:22:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:40,189 INFO L93 Difference]: Finished difference Result 245 states and 403 transitions. [2022-01-10 18:22:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 18:22:40,190 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) Word has length 136 [2022-01-10 18:22:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:40,191 INFO L225 Difference]: With dead ends: 245 [2022-01-10 18:22:40,191 INFO L226 Difference]: Without dead ends: 147 [2022-01-10 18:22:40,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 294 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-01-10 18:22:40,193 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:40,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 370 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 18:22:40,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-10 18:22:40,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2022-01-10 18:22:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 22 states have call successors, (22), 11 states have call predecessors, (22), 26 states have return successors, (74), 35 states have call predecessors, (74), 22 states have call successors, (74) [2022-01-10 18:22:40,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2022-01-10 18:22:40,222 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 136 [2022-01-10 18:22:40,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:40,222 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2022-01-10 18:22:40,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 29 states have internal predecessors, (79), 17 states have call successors, (25), 1 states have call predecessors, (25), 14 states have return successors, (28), 17 states have call predecessors, (28), 17 states have call successors, (28) [2022-01-10 18:22:40,222 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2022-01-10 18:22:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 18:22:40,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:40,228 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:40,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-10 18:22:40,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 18:22:40,442 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 449086984, now seen corresponding path program 2 times [2022-01-10 18:22:40,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:40,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301111963] [2022-01-10 18:22:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:40,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:22:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:40,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:40,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:41,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-01-10 18:22:41,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:41,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301111963] [2022-01-10 18:22:41,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301111963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:41,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114932664] [2022-01-10 18:22:41,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 18:22:41,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:41,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:22:41,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-10 18:22:41,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 18:22:41,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:22:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-10 18:22:41,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-01-10 18:22:42,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:22:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-01-10 18:22:42,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114932664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:22:42,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:22:42,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 9] total 41 [2022-01-10 18:22:42,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093239114] [2022-01-10 18:22:42,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:22:42,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-10 18:22:42,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:22:42,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-10 18:22:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-01-10 18:22:42,838 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-10 18:22:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:22:44,486 INFO L93 Difference]: Finished difference Result 254 states and 422 transitions. [2022-01-10 18:22:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 18:22:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) Word has length 98 [2022-01-10 18:22:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:22:44,490 INFO L225 Difference]: With dead ends: 254 [2022-01-10 18:22:44,490 INFO L226 Difference]: Without dead ends: 128 [2022-01-10 18:22:44,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=473, Invalid=3433, Unknown=0, NotChecked=0, Total=3906 [2022-01-10 18:22:44,492 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 112 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 18:22:44,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 562 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 18:22:44,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-10 18:22:44,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2022-01-10 18:22:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 19 states have call successors, (19), 10 states have call predecessors, (19), 22 states have return successors, (67), 30 states have call predecessors, (67), 19 states have call successors, (67) [2022-01-10 18:22:44,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 161 transitions. [2022-01-10 18:22:44,507 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 161 transitions. Word has length 98 [2022-01-10 18:22:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:22:44,507 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 161 transitions. [2022-01-10 18:22:44,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 34 states have internal predecessors, (79), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (27), 15 states have call predecessors, (27), 20 states have call successors, (27) [2022-01-10 18:22:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 161 transitions. [2022-01-10 18:22:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-10 18:22:44,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:22:44,508 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:22:44,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-10 18:22:44,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:44,712 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:22:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:22:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1981903082, now seen corresponding path program 3 times [2022-01-10 18:22:44,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:22:44,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010652992] [2022-01-10 18:22:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:22:44,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:22:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:22:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:44,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:22:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:22:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:22:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:22:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:22:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:22:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-10 18:22:45,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:22:45,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010652992] [2022-01-10 18:22:45,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010652992] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:22:45,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021485692] [2022-01-10 18:22:45,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 18:22:45,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:22:45,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:22:45,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:22:45,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-10 18:22:45,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 18:22:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:22:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 73 conjunts are in the unsatisfiable core [2022-01-10 18:22:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:22:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-10 18:22:47,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-01-10 18:23:03,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021485692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:03,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:03,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22, 22] total 53 [2022-01-10 18:23:03,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223197307] [2022-01-10 18:23:03,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:03,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-10 18:23:03,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:03,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-10 18:23:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-10 18:23:03,950 INFO L87 Difference]: Start difference. First operand 112 states and 161 transitions. Second operand has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) [2022-01-10 18:23:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:04,236 INFO L93 Difference]: Finished difference Result 133 states and 198 transitions. [2022-01-10 18:23:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-10 18:23:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) Word has length 99 [2022-01-10 18:23:04,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:04,237 INFO L225 Difference]: With dead ends: 133 [2022-01-10 18:23:04,238 INFO L226 Difference]: Without dead ends: 129 [2022-01-10 18:23:04,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-01-10 18:23:04,239 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:04,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1649 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 354 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-01-10 18:23:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-10 18:23:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-01-10 18:23:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 77 states have internal predecessors, (81), 22 states have call successors, (22), 10 states have call predecessors, (22), 25 states have return successors, (83), 36 states have call predecessors, (83), 22 states have call successors, (83) [2022-01-10 18:23:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 186 transitions. [2022-01-10 18:23:04,252 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 186 transitions. Word has length 99 [2022-01-10 18:23:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:04,253 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 186 transitions. [2022-01-10 18:23:04,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 26 states have internal predecessors, (64), 10 states have call successors, (12), 1 states have call predecessors, (12), 23 states have return successors, (32), 27 states have call predecessors, (32), 10 states have call successors, (32) [2022-01-10 18:23:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 186 transitions. [2022-01-10 18:23:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 18:23:04,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:04,255 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:04,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:04,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-10 18:23:04,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:04,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash 109842369, now seen corresponding path program 4 times [2022-01-10 18:23:04,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:04,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099452360] [2022-01-10 18:23:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:04,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:04,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:23:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-10 18:23:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 140 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-01-10 18:23:05,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099452360] [2022-01-10 18:23:05,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099452360] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:05,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122022480] [2022-01-10 18:23:05,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 18:23:05,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:05,343 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:05,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-10 18:23:05,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 18:23:05,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:05,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-10 18:23:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:15,295 WARN L228 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 4197 DAG size of output: 1869 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-10 18:23:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 149 proven. 34 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-01-10 18:23:27,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 18:23:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 149 proven. 15 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-01-10 18:23:28,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122022480] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 18:23:28,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 18:23:28,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 10] total 39 [2022-01-10 18:23:28,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969010014] [2022-01-10 18:23:28,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 18:23:28,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-10 18:23:28,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 18:23:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-10 18:23:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 18:23:28,396 INFO L87 Difference]: Start difference. First operand 124 states and 186 transitions. Second operand has 39 states, 27 states have (on average 2.962962962962963) internal successors, (80), 32 states have internal predecessors, (80), 22 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2022-01-10 18:23:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 18:23:30,266 INFO L93 Difference]: Finished difference Result 256 states and 457 transitions. [2022-01-10 18:23:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-10 18:23:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 27 states have (on average 2.962962962962963) internal successors, (80), 32 states have internal predecessors, (80), 22 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) Word has length 124 [2022-01-10 18:23:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 18:23:30,293 INFO L225 Difference]: With dead ends: 256 [2022-01-10 18:23:30,293 INFO L226 Difference]: Without dead ends: 139 [2022-01-10 18:23:30,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 262 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2022-01-10 18:23:30,311 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 130 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 18:23:30,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 709 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 18:23:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-10 18:23:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 116. [2022-01-10 18:23:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 74 states have (on average 1.054054054054054) internal successors, (78), 73 states have internal predecessors, (78), 22 states have call successors, (22), 13 states have call predecessors, (22), 19 states have return successors, (55), 29 states have call predecessors, (55), 22 states have call successors, (55) [2022-01-10 18:23:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2022-01-10 18:23:30,326 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 124 [2022-01-10 18:23:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 18:23:30,327 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2022-01-10 18:23:30,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 27 states have (on average 2.962962962962963) internal successors, (80), 32 states have internal predecessors, (80), 22 states have call successors, (30), 1 states have call predecessors, (30), 14 states have return successors, (35), 23 states have call predecessors, (35), 22 states have call successors, (35) [2022-01-10 18:23:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2022-01-10 18:23:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-10 18:23:30,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 18:23:30,329 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 14, 13, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 18:23:30,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-10 18:23:30,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 18:23:30,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 18:23:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 18:23:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash -927394469, now seen corresponding path program 5 times [2022-01-10 18:23:30,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 18:23:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010179798] [2022-01-10 18:23:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 18:23:30,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 18:23:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-10 18:23:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:23:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-10 18:23:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-10 18:23:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-10 18:23:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-10 18:23:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-10 18:23:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-10 18:23:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:30,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 18:23:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:31,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-10 18:23:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 18:23:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 206 proven. 3 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2022-01-10 18:23:31,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 18:23:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010179798] [2022-01-10 18:23:31,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010179798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 18:23:31,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974548793] [2022-01-10 18:23:31,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 18:23:31,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 18:23:31,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 18:23:31,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 18:23:31,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-10 18:23:31,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-01-10 18:23:31,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 18:23:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 18:23:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 18:23:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1517 backedges. 302 proven. 259 refuted. 0 times theorem prover too weak. 956 trivial. 0 not checked. [2022-01-10 18:23:32,243 INFO L328 TraceCheckSpWp]: Computing backward predicates...