/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_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:12:47,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:12:47,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:12:47,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-11 00:12:47,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-11 00:12:47,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-11 00:12:47,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-11 00:12:47,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-11 00:12:47,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-11 00:12:47,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-11 00:12:47,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-11 00:12:47,735 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-11 00:12:47,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:12:47,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:12:47,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:12:47,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:12:47,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:12:47,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:12:47,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:12:47,751 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:12:47,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:12:47,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:12:47,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:12:47,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:12:47,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 00:12:47,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:12:47,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:12:47,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:12:47,766 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 00:12:47,792 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:12:47,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:12:47,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:12:47,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:12:47,793 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:12:47,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:12:47,794 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:12:47,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:12:47,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:12:47,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:12:47,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:12:47,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:12:47,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:12:47,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:12:47,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:12:47,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:12:47,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:12:47,798 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:12:47,798 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:12:48,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:12:48,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:12:48,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:12:48,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:12:48,039 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:12:48,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2022-01-11 00:12:48,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c14ad640/bfa81391b2d74efa826987c8dbde44c2/FLAG1c4b28a95 [2022-01-11 00:12:48,475 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:12:48,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2022-01-11 00:12:48,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c14ad640/bfa81391b2d74efa826987c8dbde44c2/FLAG1c4b28a95 [2022-01-11 00:12:48,495 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c14ad640/bfa81391b2d74efa826987c8dbde44c2 [2022-01-11 00:12:48,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:12:48,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:12:48,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:12:48,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:12:48,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:12:48,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29be2fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48, skipping insertion in model container [2022-01-11 00:12:48,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:12:48,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:12:48,686 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_5-1.c[740,753] [2022-01-11 00:12:48,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:12:48,698 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:12:48,712 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_5-1.c[740,753] [2022-01-11 00:12:48,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:12:48,724 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:12:48,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48 WrapperNode [2022-01-11 00:12:48,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:12:48,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:12:48,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:12:48,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:12:48,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,748 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-01-11 00:12:48,749 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:12:48,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:12:48,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:12:48,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:12:48,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:12:48,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:12:48,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:12:48,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:12:48,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:48,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:12:48,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:48,796 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 00:12:48,823 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 00:12:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:12:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:12:48,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:12:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:12:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-01-11 00:12:48,834 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-01-11 00:12:48,879 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:12:48,880 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:12:48,976 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:12:48,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:12:48,980 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:12:48,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:48 BoogieIcfgContainer [2022-01-11 00:12:48,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:12:48,982 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:12:48,982 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:12:48,983 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:12:48,984 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:48" (1/1) ... [2022-01-11 00:12:49,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:12:49 BasicIcfg [2022-01-11 00:12:49,045 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:12:49,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:12:49,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:12:49,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:12:49,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:12:48" (1/4) ... [2022-01-11 00:12:49,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b84db3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:12:49, skipping insertion in model container [2022-01-11 00:12:49,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:12:48" (2/4) ... [2022-01-11 00:12:49,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b84db3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:12:49, skipping insertion in model container [2022-01-11 00:12:49,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:12:48" (3/4) ... [2022-01-11 00:12:49,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b84db3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:12:49, skipping insertion in model container [2022-01-11 00:12:49,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:12:49" (4/4) ... [2022-01-11 00:12:49,050 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.cTransformedIcfg [2022-01-11 00:12:49,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:12:49,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 00:12:49,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:12:49,106 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 00:12:49,106 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 00:12:49,117 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 00:12:49,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 00:12:49,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:49,120 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:49,121 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2142902620, now seen corresponding path program 1 times [2022-01-11 00:12:49,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021451483] [2022-01-11 00:12:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:49,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,409 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 00:12:49,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:49,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021451483] [2022-01-11 00:12:49,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021451483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:49,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:12:49,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:12:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537660780] [2022-01-11 00:12:49,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:49,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:12:49,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:49,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:12:49,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:12:49,439 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 00:12:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:49,526 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-01-11 00:12:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:12:49,529 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 00:12:49,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:49,534 INFO L225 Difference]: With dead ends: 29 [2022-01-11 00:12:49,534 INFO L226 Difference]: Without dead ends: 17 [2022-01-11 00:12:49,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:12:49,539 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 00:12:49,540 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 00:12:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-11 00:12:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-11 00:12:49,562 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 00:12:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:12:49,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2022-01-11 00:12:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:49,563 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:12:49,564 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 00:12:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:12:49,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:12:49,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:49,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:49,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:12:49,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1380246405, now seen corresponding path program 1 times [2022-01-11 00:12:49,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154182890] [2022-01-11 00:12:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:49,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,636 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 00:12:49,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:49,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154182890] [2022-01-11 00:12:49,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154182890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:12:49,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:12:49,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 00:12:49,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428366200] [2022-01-11 00:12:49,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:12:49,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 00:12:49,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 00:12:49,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-11 00:12:49,639 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 00:12:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:49,681 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-01-11 00:12:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 00:12:49,682 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 00:12:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:49,684 INFO L225 Difference]: With dead ends: 23 [2022-01-11 00:12:49,684 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 00:12:49,688 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 00:12:49,689 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 00:12:49,690 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 00:12:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 00:12:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-01-11 00:12:49,698 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 00:12:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-01-11 00:12:49,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-01-11 00:12:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:49,699 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-01-11 00:12:49,700 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 00:12:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-01-11 00:12:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 00:12:49,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:49,700 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 00:12:49,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:12:49,701 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash -794894887, now seen corresponding path program 1 times [2022-01-11 00:12:49,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730136377] [2022-01-11 00:12:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:49,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:49,954 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 00:12:49,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:49,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730136377] [2022-01-11 00:12:49,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730136377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:49,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393634774] [2022-01-11 00:12:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:49,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:49,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:49,957 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 00:12:49,976 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 00:12:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:50,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:12:50,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:50,281 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 00:12:50,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:50,949 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 00:12:50,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393634774] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:50,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:50,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 13 [2022-01-11 00:12:50,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458228559] [2022-01-11 00:12:50,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:50,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-11 00:12:50,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:50,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-11 00:12:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-11 00:12:50,956 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 00:12:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:51,739 INFO L93 Difference]: Finished difference Result 46 states and 74 transitions. [2022-01-11 00:12:51,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:12:51,740 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 00:12:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:51,741 INFO L225 Difference]: With dead ends: 46 [2022-01-11 00:12:51,741 INFO L226 Difference]: Without dead ends: 32 [2022-01-11 00:12:51,742 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 00:12:51,742 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 00:12:51,742 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 00:12:51,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-11 00:12:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-11 00:12:51,747 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 00:12:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-01-11 00:12:51,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 22 [2022-01-11 00:12:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:51,749 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-01-11 00:12:51,749 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 00:12:51,750 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-01-11 00:12:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-11 00:12:51,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:51,751 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 00:12:51,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:51,967 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 00:12:51,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash -577495408, now seen corresponding path program 1 times [2022-01-11 00:12:51,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:51,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137570040] [2022-01-11 00:12:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:51,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,122 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 00:12:52,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137570040] [2022-01-11 00:12:52,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137570040] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867104913] [2022-01-11 00:12:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:52,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:52,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:52,124 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 00:12:52,125 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 00:12:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-11 00:12:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:52,311 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 00:12:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:52,574 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 00:12:52,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867104913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:52,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:52,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-11 00:12:52,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668413533] [2022-01-11 00:12:52,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:52,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-11 00:12:52,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-11 00:12:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-11 00:12:52,579 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 00:12:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:52,697 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-01-11 00:12:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-11 00:12:52,698 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 00:12:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:52,699 INFO L225 Difference]: With dead ends: 43 [2022-01-11 00:12:52,699 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 00:12:52,699 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 00:12:52,700 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 00:12:52,700 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 00:12:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 00:12:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-11 00:12:52,706 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 00:12:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2022-01-11 00:12:52,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 36 [2022-01-11 00:12:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2022-01-11 00:12:52,707 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 00:12:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2022-01-11 00:12:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-11 00:12:52,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:52,708 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 00:12:52,725 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 00:12:52,912 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 00:12:52,913 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:52,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:52,913 INFO L85 PathProgramCache]: Analyzing trace with hash -74975079, now seen corresponding path program 2 times [2022-01-11 00:12:52,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:52,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190064255] [2022-01-11 00:12:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:52,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:52,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:53,126 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 00:12:53,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:53,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190064255] [2022-01-11 00:12:53,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190064255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:53,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820511287] [2022-01-11 00:12:53,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-11 00:12:53,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:53,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:53,127 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 00:12:53,129 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 00:12:53,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-11 00:12:53,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:53,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:12:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 70 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-01-11 00:12:53,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-11 00:12:53,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820511287] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:53,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:53,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 21 [2022-01-11 00:12:53,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480640818] [2022-01-11 00:12:53,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:53,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-11 00:12:53,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-11 00:12:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-11 00:12:53,711 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), 13 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-11 00:12:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:53,941 INFO L93 Difference]: Finished difference Result 73 states and 121 transitions. [2022-01-11 00:12:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-11 00:12:53,942 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), 13 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) Word has length 61 [2022-01-11 00:12:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:53,943 INFO L225 Difference]: With dead ends: 73 [2022-01-11 00:12:53,943 INFO L226 Difference]: Without dead ends: 47 [2022-01-11 00:12:53,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-01-11 00:12:53,945 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:53,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 110 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:12:53,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-11 00:12:53,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-01-11 00:12:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-01-11 00:12:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2022-01-11 00:12:53,951 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 61 [2022-01-11 00:12:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:53,952 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2022-01-11 00:12:53,952 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), 13 states have call successors, (14), 1 states have call predecessors, (14), 9 states have return successors, (16), 9 states have call predecessors, (16), 13 states have call successors, (16) [2022-01-11 00:12:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2022-01-11 00:12:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-11 00:12:53,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:53,954 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:53,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-11 00:12:54,169 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 00:12:54,169 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash -360745829, now seen corresponding path program 3 times [2022-01-11 00:12:54,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:54,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670282894] [2022-01-11 00:12:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:54,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:12:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:12:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:54,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-01-11 00:12:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-11 00:12:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-11 00:12:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 49 proven. 108 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2022-01-11 00:12:54,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:54,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670282894] [2022-01-11 00:12:54,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670282894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020965314] [2022-01-11 00:12:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-11 00:12:54,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:54,581 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 00:12:54,582 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 00:12:54,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-11 00:12:54,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:12:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 180 proven. 5 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-11 00:12:55,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-01-11 00:12:56,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020965314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:56,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:56,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 23 [2022-01-11 00:12:56,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758153140] [2022-01-11 00:12:56,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:56,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-11 00:12:56,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-11 00:12:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-11 00:12:56,160 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 23 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (15), 2 states have call predecessors, (15), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 00:12:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:56,481 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2022-01-11 00:12:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:12:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (15), 2 states have call predecessors, (15), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) Word has length 83 [2022-01-11 00:12:56,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:56,482 INFO L225 Difference]: With dead ends: 75 [2022-01-11 00:12:56,483 INFO L226 Difference]: Without dead ends: 35 [2022-01-11 00:12:56,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-01-11 00:12:56,492 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:56,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 113 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:12:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-11 00:12:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-11 00:12:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-01-11 00:12:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-11 00:12:56,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 83 [2022-01-11 00:12:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:56,498 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-11 00:12:56,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 20 states have internal predecessors, (43), 10 states have call successors, (15), 2 states have call predecessors, (15), 8 states have return successors, (19), 8 states have call predecessors, (19), 10 states have call successors, (19) [2022-01-11 00:12:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-11 00:12:56,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-11 00:12:56,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:56,499 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:56,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 00:12:56,699 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 00:12:56,699 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:56,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1361828763, now seen corresponding path program 4 times [2022-01-11 00:12:56,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:56,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326116361] [2022-01-11 00:12:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:56,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 44 proven. 109 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-01-11 00:12:56,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:56,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326116361] [2022-01-11 00:12:56,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326116361] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:56,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589163564] [2022-01-11 00:12:56,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-11 00:12:56,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:56,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:56,949 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 00:12:56,950 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 00:12:57,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-11 00:12:57,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:12:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-11 00:12:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:12:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 44 proven. 102 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-01-11 00:12:57,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:12:57,689 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 44 proven. 109 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-01-11 00:12:57,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589163564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:12:57,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:12:57,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 9] total 20 [2022-01-11 00:12:57,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425652804] [2022-01-11 00:12:57,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:12:57,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-11 00:12:57,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:12:57,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-11 00:12:57,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-11 00:12:57,691 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 20 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), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:12:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:12:58,092 INFO L93 Difference]: Finished difference Result 73 states and 103 transitions. [2022-01-11 00:12:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-11 00:12:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 20 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), 11 states have call predecessors, (16), 10 states have call successors, (16) Word has length 87 [2022-01-11 00:12:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:12:58,094 INFO L225 Difference]: With dead ends: 73 [2022-01-11 00:12:58,094 INFO L226 Difference]: Without dead ends: 43 [2022-01-11 00:12:58,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-01-11 00:12:58,096 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 00:12:58,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 109 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 00:12:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-11 00:12:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-11 00:12:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (15), 9 states have call predecessors, (15), 7 states have call successors, (15) [2022-01-11 00:12:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2022-01-11 00:12:58,103 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 87 [2022-01-11 00:12:58,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:12:58,103 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2022-01-11 00:12:58,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 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), 11 states have call predecessors, (16), 10 states have call successors, (16) [2022-01-11 00:12:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2022-01-11 00:12:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-11 00:12:58,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:12:58,105 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:12:58,133 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 00:12:58,319 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 00:12:58,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:12:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:12:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1737339745, now seen corresponding path program 5 times [2022-01-11 00:12:58,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:12:58,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314906184] [2022-01-11 00:12:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:12:58,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:12:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:12:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:58,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:12:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:12:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:12:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:12:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:12:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:12:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:12:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 257 proven. 368 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-01-11 00:12:59,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:12:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314906184] [2022-01-11 00:12:59,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314906184] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:12:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647836848] [2022-01-11 00:12:59,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-11 00:12:59,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:12:59,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:12:59,423 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 00:12:59,424 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 00:13:00,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-01-11 00:13:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:00,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-11 00:13:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:13:14,869 WARN L228 SmtUtils]: Spent 13.28s on a formula simplification. DAG size of input: 5011 DAG size of output: 1950 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-11 00:13:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 293 proven. 252 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2022-01-11 00:13:19,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:13:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 307 proven. 276 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-01-11 00:13:21,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647836848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:13:21,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:13:21,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 16] total 41 [2022-01-11 00:13:21,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778807103] [2022-01-11 00:13:21,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:13:21,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-11 00:13:21,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:13:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-11 00:13:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2022-01-11 00:13:21,568 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 41 states, 30 states have (on average 2.533333333333333) internal successors, (76), 35 states have internal predecessors, (76), 25 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (38), 23 states have call predecessors, (38), 25 states have call successors, (38) [2022-01-11 00:13:22,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:13:22,719 INFO L93 Difference]: Finished difference Result 95 states and 137 transitions. [2022-01-11 00:13:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-11 00:13:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 30 states have (on average 2.533333333333333) internal successors, (76), 35 states have internal predecessors, (76), 25 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (38), 23 states have call predecessors, (38), 25 states have call successors, (38) Word has length 137 [2022-01-11 00:13:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:13:22,720 INFO L225 Difference]: With dead ends: 95 [2022-01-11 00:13:22,720 INFO L226 Difference]: Without dead ends: 58 [2022-01-11 00:13:22,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 279 SyntacticMatches, 18 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2022-01-11 00:13:22,722 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-11 00:13:22,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 229 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-11 00:13:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-11 00:13:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-01-11 00:13:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.0) internal successors, (32), 32 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-11 00:13:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-01-11 00:13:22,728 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 137 [2022-01-11 00:13:22,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:13:22,729 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-01-11 00:13:22,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 30 states have (on average 2.533333333333333) internal successors, (76), 35 states have internal predecessors, (76), 25 states have call successors, (31), 1 states have call predecessors, (31), 15 states have return successors, (38), 23 states have call predecessors, (38), 25 states have call successors, (38) [2022-01-11 00:13:22,729 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-01-11 00:13:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-11 00:13:22,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:13:22,730 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:13:22,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-11 00:13:22,934 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 00:13:22,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:13:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:13:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1515641660, now seen corresponding path program 6 times [2022-01-11 00:13:22,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:13:22,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55128576] [2022-01-11 00:13:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:13:22,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:13:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-11 00:13:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-11 00:13:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-11 00:13:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-11 00:13:23,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-11 00:13:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-11 00:13:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:13:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 16 proven. 200 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-01-11 00:13:23,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:13:23,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55128576] [2022-01-11 00:13:23,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55128576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:13:23,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201331431] [2022-01-11 00:13:23,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-11 00:13:23,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:13:23,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:13:23,546 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 00:13:23,547 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 00:13:23,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-01-11 00:13:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-11 00:13:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 72 conjunts are in the unsatisfiable core [2022-01-11 00:13:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates...