/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_NONE.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:12:52,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:12:52,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:12:52,456 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 00:12:52,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:12:52,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:12:52,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:12:52,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:12:52,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:12:52,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:12:52,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:12:52,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:12:52,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:12:52,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:12:52,492 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:12:52,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:12:52,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 00:12:52,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:12:52,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:12:52,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:12:52,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-11 00:12:52,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:12:52,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:12:52,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:12:52,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:12:52,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:12:52,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:12:52,541 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:12:52,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:12:52,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:12:52,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:12:52,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:12:52,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:12:52,544 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:12:52,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:12:52,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:12:52,544 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:12:52,544 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:12:52,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:12:52,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:12:52,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:12:52,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:12:52,753 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:12:52,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2022-01-11 00:12:52,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8e28c06/e397499977e0491a8f252b45f44b176e/FLAGf77a9a762 [2022-01-11 00:12:53,163 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:12:53,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_7-1.c [2022-01-11 00:12:53,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8e28c06/e397499977e0491a8f252b45f44b176e/FLAGf77a9a762 [2022-01-11 00:12:53,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8e28c06/e397499977e0491a8f252b45f44b176e [2022-01-11 00:12:53,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:12:53,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:12:53,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:12:53,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:12:53,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:12:53,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bced015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53, skipping insertion in model container [2022-01-11 00:12:53,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:12:53,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:12:53,331 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_7-1.c[741,754] [2022-01-11 00:12:53,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:12:53,369 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:12:53,384 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_7-1.c[741,754] [2022-01-11 00:12:53,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:12:53,398 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:12:53,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53 WrapperNode [2022-01-11 00:12:53,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:12:53,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:12:53,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:12:53,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:12:53,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,426 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:12:53,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:12:53,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:12:53,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:12:53,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:12:53,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:12:53,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:12:53,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:12:53,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:12:53,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:12:53,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:53,481 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) [2022-01-11 00:12:53,499 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 [2022-01-11 00:12:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:12:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:12:53,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:12:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:12:53,511 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 00:12:53,512 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 00:12:53,556 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:12:53,557 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:12:53,645 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:12:53,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:12:53,654 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:12:53,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:53 BoogieIcfgContainer [2022-01-11 00:12:53,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:12:53,656 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:12:53,656 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:12:53,658 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:12:53,660 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:53" (1/1) ... [2022-01-11 00:12:53,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:12:53 BasicIcfg [2022-01-11 00:12:53,737 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:12:53,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:12:53,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:12:53,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:12:53,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:12:53" (1/4) ... [2022-01-11 00:12:53,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5fa1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:12:53, skipping insertion in model container [2022-01-11 00:12:53,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:53" (2/4) ... [2022-01-11 00:12:53,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5fa1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:12:53, skipping insertion in model container [2022-01-11 00:12:53,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:53" (3/4) ... [2022-01-11 00:12:53,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5fa1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:12:53, skipping insertion in model container [2022-01-11 00:12:53,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:12:53" (4/4) ... [2022-01-11 00:12:53,745 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-1.cTransformedIcfg [2022-01-11 00:12:53,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:12:53,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:12:53,799 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:12:53,804 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 [2022-01-11 00:12:53,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:12:53,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-11 00:12:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:12:53,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:53,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:53,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 00:12:53,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:53,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520027667] [2022-01-11 00:12:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:53,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:12:54,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:54,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520027667] [2022-01-11 00:12:54,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520027667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:54,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:12:54,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:12:54,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409276901] [2022-01-11 00:12:54,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:54,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:12:54,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:12:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:12:54,110 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-01-11 00:12:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:54,186 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 00:12:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:12:54,188 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 [2022-01-11 00:12:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:54,193 INFO L225 Difference]: With dead ends: 29 [2022-01-11 00:12:54,193 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 00:12:54,196 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 [2022-01-11 00:12:54,200 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:54,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:12:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 00:12:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 00:12:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:12:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:12:54,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 00:12:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:54,227 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:12:54,228 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) [2022-01-11 00:12:54,228 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:12:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:12:54,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:54,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:54,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:12:54,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:54,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 00:12:54,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:54,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078903704] [2022-01-11 00:12:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:54,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:12:54,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:54,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078903704] [2022-01-11 00:12:54,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078903704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:54,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:12:54,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:12:54,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655409299] [2022-01-11 00:12:54,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:54,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:12:54,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:12:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:12:54,313 INFO L87 Difference]: Start difference. First operand 17 states and 21 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) [2022-01-11 00:12:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:54,362 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 00:12:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:12:54,362 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 [2022-01-11 00:12:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:54,364 INFO L225 Difference]: With dead ends: 23 [2022-01-11 00:12:54,364 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 00:12:54,369 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 [2022-01-11 00:12:54,370 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:54,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 30 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:12:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 00:12:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 00:12:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-11 00:12:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:12:54,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 00:12:54,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:54,385 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:12:54,385 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) [2022-01-11 00:12:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:12:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:12:54,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:54,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:54,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:12:54,386 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 00:12:54,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:54,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536327219] [2022-01-11 00:12:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:54,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:12:54,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536327219] [2022-01-11 00:12:54,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536327219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25737241] [2022-01-11 00:12:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:54,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:54,711 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) [2022-01-11 00:12:54,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:12:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:12:54,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-11 00:12:55,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-11 00:12:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25737241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:55,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:55,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 00:12:55,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674901968] [2022-01-11 00:12:55,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 00:12:55,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 00:12:55,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:12:55,783 INFO L87 Difference]: Start difference. First operand 17 states and 21 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, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 00:12:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:56,515 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 00:12:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:12:56,516 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, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 22 [2022-01-11 00:12:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:56,517 INFO L225 Difference]: With dead ends: 46 [2022-01-11 00:12:56,517 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 00:12:56,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-11 00:12:56,518 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:56,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 62 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-11 00:12:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 00:12:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 00:12:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-01-11 00:12:56,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 00:12:56,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 00:12:56,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:56,525 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 00:12:56,525 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, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-01-11 00:12:56,525 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 00:12:56,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 00:12:56,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:56,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:56,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 00:12:56,743 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 [2022-01-11 00:12:56,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:56,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:56,744 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 00:12:56,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:56,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830032658] [2022-01-11 00:12:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:56,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:12:56,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830032658] [2022-01-11 00:12:56,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830032658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:56,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137043936] [2022-01-11 00:12:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:56,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:56,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:56,936 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) [2022-01-11 00:12:56,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:12:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:12:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-11 00:12:57,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-11 00:12:57,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137043936] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:57,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:57,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 00:12:57,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466222889] [2022-01-11 00:12:57,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:57,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 00:12:57,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 00:12:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 00:12:57,423 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:12:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:57,554 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 00:12:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:12:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 36 [2022-01-11 00:12:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:57,556 INFO L225 Difference]: With dead ends: 43 [2022-01-11 00:12:57,556 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 00:12:57,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-11 00:12:57,557 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:57,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:12:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 00:12:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 00:12:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (17), 7 states have call predecessors, (17), 5 states have call successors, (17) [2022-01-11 00:12:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 00:12:57,566 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 00:12:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:57,566 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 00:12:57,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.2) internal successors, (32), 12 states have internal predecessors, (32), 6 states have call successors, (10), 1 states have call predecessors, (10), 5 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2022-01-11 00:12:57,566 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 00:12:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:12:57,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:57,568 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:57,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:57,788 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 [2022-01-11 00:12:57,789 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 00:12:57,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:57,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937804791] [2022-01-11 00:12:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:57,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:57,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:57,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:57,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:57,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:57,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 19 proven. 74 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:12:58,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937804791] [2022-01-11 00:12:58,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937804791] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436954070] [2022-01-11 00:12:58,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:12:58,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:58,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:58,030 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) [2022-01-11 00:12:58,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 00:12:58,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:12:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:12:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 26 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-11 00:12:58,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 59 proven. 34 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:12:58,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436954070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:58,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:58,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 00:12:58,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274794341] [2022-01-11 00:12:58,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:58,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 00:12:58,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 00:12:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:12:58,836 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:12:59,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:59,129 INFO L93 Difference]: Finished difference Result 81 states and 152 transitions. [2022-01-11 00:12:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:12:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 61 [2022-01-11 00:12:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:59,132 INFO L225 Difference]: With dead ends: 81 [2022-01-11 00:12:59,132 INFO L226 Difference]: Without dead ends: 55 [2022-01-11 00:12:59,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:12:59,133 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:59,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:12:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-11 00:12:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-01-11 00:12:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 2 states have call predecessors, (7), 11 states have return successors, (43), 15 states have call predecessors, (43), 7 states have call successors, (43) [2022-01-11 00:12:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 82 transitions. [2022-01-11 00:12:59,145 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 82 transitions. Word has length 61 [2022-01-11 00:12:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:59,145 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 82 transitions. [2022-01-11 00:12:59,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 19 states have internal predecessors, (48), 10 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:12:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 82 transitions. [2022-01-11 00:12:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-11 00:12:59,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:59,148 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:59,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:59,362 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 [2022-01-11 00:12:59,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:59,363 INFO L85 PathProgramCache]: Analyzing trace with hash 311221116, now seen corresponding path program 2 times [2022-01-11 00:12:59,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:59,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402434282] [2022-01-11 00:12:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:59,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:12:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:12:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:12:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:12:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 49 proven. 106 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-11 00:12:59,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402434282] [2022-01-11 00:12:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402434282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:59,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135073148] [2022-01-11 00:12:59,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:12:59,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:59,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:59,884 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) [2022-01-11 00:12:59,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 00:13:00,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:13:00,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:00,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-11 00:13:00,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:00,428 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 211 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-01-11 00:13:00,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-01-11 00:13:01,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135073148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:01,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:01,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 8] total 23 [2022-01-11 00:13:01,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776108720] [2022-01-11 00:13:01,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:01,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 00:13:01,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 00:13:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-01-11 00:13:01,084 INFO L87 Difference]: Start difference. First operand 49 states and 82 transitions. Second operand has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:13:01,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:01,216 INFO L93 Difference]: Finished difference Result 84 states and 154 transitions. [2022-01-11 00:13:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:13:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) Word has length 82 [2022-01-11 00:13:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:01,219 INFO L225 Difference]: With dead ends: 84 [2022-01-11 00:13:01,219 INFO L226 Difference]: Without dead ends: 38 [2022-01-11 00:13:01,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-01-11 00:13:01,220 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:01,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 84 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:13:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-11 00:13:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-11 00:13:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (23), 10 states have call predecessors, (23), 5 states have call successors, (23) [2022-01-11 00:13:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2022-01-11 00:13:01,226 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 82 [2022-01-11 00:13:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:01,226 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 54 transitions. [2022-01-11 00:13:01,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.411764705882353) internal successors, (41), 22 states have internal predecessors, (41), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (16), 5 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:13:01,227 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 54 transitions. [2022-01-11 00:13:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-11 00:13:01,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:01,228 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:01,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-11 00:13:01,440 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 [2022-01-11 00:13:01,440 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:01,441 INFO L85 PathProgramCache]: Analyzing trace with hash 326140542, now seen corresponding path program 3 times [2022-01-11 00:13:01,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:01,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920931905] [2022-01-11 00:13:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:01,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:01,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:13:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 90 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-11 00:13:01,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920931905] [2022-01-11 00:13:01,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920931905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:01,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243238279] [2022-01-11 00:13:01,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:13:01,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:01,655 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) [2022-01-11 00:13:01,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 00:13:01,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-11 00:13:01,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:01,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:13:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-11 00:13:02,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-01-11 00:13:02,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243238279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:02,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:02,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 9] total 21 [2022-01-11 00:13:02,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402012000] [2022-01-11 00:13:02,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:02,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 00:13:02,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 00:13:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:13:02,607 INFO L87 Difference]: Start difference. First operand 38 states and 54 transitions. Second operand has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-01-11 00:13:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:03,011 INFO L93 Difference]: Finished difference Result 88 states and 158 transitions. [2022-01-11 00:13:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:13:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) Word has length 60 [2022-01-11 00:13:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:03,013 INFO L225 Difference]: With dead ends: 88 [2022-01-11 00:13:03,013 INFO L226 Difference]: Without dead ends: 53 [2022-01-11 00:13:03,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-01-11 00:13:03,014 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:03,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:13:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-11 00:13:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-01-11 00:13:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 10 states have return successors, (32), 12 states have call predecessors, (32), 6 states have call successors, (32) [2022-01-11 00:13:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 67 transitions. [2022-01-11 00:13:03,022 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 67 transitions. Word has length 60 [2022-01-11 00:13:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:03,022 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 67 transitions. [2022-01-11 00:13:03,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.764705882352941) internal successors, (47), 19 states have internal predecessors, (47), 12 states have call successors, (15), 1 states have call predecessors, (15), 10 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2022-01-11 00:13:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 67 transitions. [2022-01-11 00:13:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-11 00:13:03,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:03,025 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 13, 13, 13, 13, 13, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:03,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:03,225 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 [2022-01-11 00:13:03,226 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:03,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1898382172, now seen corresponding path program 4 times [2022-01-11 00:13:03,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:03,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586357647] [2022-01-11 00:13:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:03,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:13:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-11 00:13:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:13:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:03,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:13:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-11 00:13:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 78 proven. 501 refuted. 0 times theorem prover too weak. 1212 trivial. 0 not checked. [2022-01-11 00:13:04,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586357647] [2022-01-11 00:13:04,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586357647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584292653] [2022-01-11 00:13:04,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:13:04,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:04,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:04,092 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) [2022-01-11 00:13:04,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-11 00:13:04,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:13:04,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-11 00:13:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 65 proven. 470 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2022-01-11 00:13:11,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 65 proven. 496 refuted. 0 times theorem prover too weak. 1230 trivial. 0 not checked. [2022-01-11 00:13:12,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584292653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:12,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:12,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 13] total 32 [2022-01-11 00:13:12,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850913517] [2022-01-11 00:13:12,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:12,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-11 00:13:12,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-11 00:13:12,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-11 00:13:12,764 INFO L87 Difference]: Start difference. First operand 44 states and 67 transitions. Second operand has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) [2022-01-11 00:13:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:15,020 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2022-01-11 00:13:15,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-11 00:13:15,021 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) Word has length 171 [2022-01-11 00:13:15,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:15,025 INFO L225 Difference]: With dead ends: 91 [2022-01-11 00:13:15,025 INFO L226 Difference]: Without dead ends: 48 [2022-01-11 00:13:15,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 372 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=332, Invalid=1560, Unknown=0, NotChecked=0, Total=1892 [2022-01-11 00:13:15,028 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 125 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:15,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 232 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-11 00:13:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-11 00:13:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-11 00:13:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2022-01-11 00:13:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-01-11 00:13:15,072 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 171 [2022-01-11 00:13:15,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:15,073 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-01-11 00:13:15,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.5) internal successors, (65), 29 states have internal predecessors, (65), 21 states have call successors, (22), 1 states have call predecessors, (22), 15 states have return successors, (28), 15 states have call predecessors, (28), 21 states have call successors, (28) [2022-01-11 00:13:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-01-11 00:13:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-11 00:13:15,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:15,090 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:15,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-11 00:13:15,290 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 [2022-01-11 00:13:15,291 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:15,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2094436169, now seen corresponding path program 5 times [2022-01-11 00:13:15,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:15,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055522443] [2022-01-11 00:13:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:15,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:13:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:13:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-11 00:13:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:13:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:13:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 134 proven. 539 refuted. 0 times theorem prover too weak. 1802 trivial. 0 not checked. [2022-01-11 00:13:16,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055522443] [2022-01-11 00:13:16,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055522443] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858057554] [2022-01-11 00:13:16,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 00:13:16,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:16,384 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) [2022-01-11 00:13:16,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-11 00:13:17,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-11 00:13:17,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-11 00:13:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates...