/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/list-properties/list_search-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 23:31:06,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 23:31:06,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 23:31:06,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 23:31:06,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 23:31:06,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 23:31:06,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 23:31:06,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 23:31:06,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 23:31:06,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 23:31:06,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 23:31:06,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 23:31:06,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 23:31:06,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 23:31:06,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 23:31:06,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 23:31:06,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 23:31:06,117 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 23:31:06,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 23:31:06,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 23:31:06,119 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 [2022-01-10 23:31:06,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 23:31:06,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 23:31:06,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 23:31:06,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 23:31:06,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 23:31:06,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 23:31:06,139 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 23:31:06,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 23:31:06,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 23:31:06,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 23:31:06,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 23:31:06,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 23:31:06,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:31:06,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 23:31:06,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 23:31:06,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 23:31:06,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 23:31:06,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 23:31:06,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 23:31:06,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 23:31:06,144 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 23:31:06,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 23:31:06,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 23:31:06,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 23:31:06,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 23:31:06,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 23:31:06,369 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 23:31:06,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-2.i [2022-01-10 23:31:06,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2db126b/37f5b87f4d2c4a73b8b4db8bc7ad6c3d/FLAGee866e2df [2022-01-10 23:31:06,903 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 23:31:06,903 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i [2022-01-10 23:31:06,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2db126b/37f5b87f4d2c4a73b8b4db8bc7ad6c3d/FLAGee866e2df [2022-01-10 23:31:06,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e2db126b/37f5b87f4d2c4a73b8b4db8bc7ad6c3d [2022-01-10 23:31:06,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 23:31:06,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 23:31:06,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 23:31:06,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 23:31:06,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 23:31:06,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:31:06" (1/1) ... [2022-01-10 23:31:06,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f494dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:06, skipping insertion in model container [2022-01-10 23:31:06,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:31:06" (1/1) ... [2022-01-10 23:31:06,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 23:31:06,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 23:31:07,209 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i[813,826] [2022-01-10 23:31:07,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:31:07,430 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-01-10 23:31:07,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 23:31:07,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i[813,826] [2022-01-10 23:31:07,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:31:07,489 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 23:31:07,498 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-2.i[813,826] [2022-01-10 23:31:07,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:31:07,563 INFO L208 MainTranslator]: Completed translation [2022-01-10 23:31:07,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07 WrapperNode [2022-01-10 23:31:07,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 23:31:07,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 23:31:07,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 23:31:07,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 23:31:07,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,613 INFO L137 Inliner]: procedures = 229, calls = 29, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 149 [2022-01-10 23:31:07,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 23:31:07,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 23:31:07,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 23:31:07,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 23:31:07,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 23:31:07,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 23:31:07,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 23:31:07,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 23:31:07,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (1/1) ... [2022-01-10 23:31:07,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:31:07,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:31:07,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 23:31:07,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 23:31:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 23:31:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 23:31:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 23:31:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 23:31:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 23:31:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 23:31:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 23:31:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 23:31:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 23:31:07,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 23:31:07,915 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 23:31:07,916 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 23:31:08,493 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 23:31:08,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 23:31:08,499 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 23:31:08,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:31:08 BoogieIcfgContainer [2022-01-10 23:31:08,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 23:31:08,501 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 23:31:08,501 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 23:31:08,504 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 23:31:08,506 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:31:08" (1/1) ... [2022-01-10 23:31:08,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:31:08 BasicIcfg [2022-01-10 23:31:08,635 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 23:31:08,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 23:31:08,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 23:31:08,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 23:31:08,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:31:06" (1/4) ... [2022-01-10 23:31:08,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b4d5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:31:08, skipping insertion in model container [2022-01-10 23:31:08,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:31:07" (2/4) ... [2022-01-10 23:31:08,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b4d5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:31:08, skipping insertion in model container [2022-01-10 23:31:08,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:31:08" (3/4) ... [2022-01-10 23:31:08,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b4d5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:31:08, skipping insertion in model container [2022-01-10 23:31:08,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:31:08" (4/4) ... [2022-01-10 23:31:08,645 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-2.iTransformedIcfg [2022-01-10 23:31:08,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 23:31:08,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 23:31:08,689 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 23:31:08,694 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 23:31:08,694 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 23:31:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-10 23:31:08,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:08,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:08,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1722702889, now seen corresponding path program 1 times [2022-01-10 23:31:08,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:08,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101529449] [2022-01-10 23:31:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:08,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:31:09,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101529449] [2022-01-10 23:31:09,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101529449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:31:09,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:31:09,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 23:31:09,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216689244] [2022-01-10 23:31:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:31:09,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 23:31:09,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 23:31:09,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 23:31:09,203 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:09,399 INFO L93 Difference]: Finished difference Result 71 states and 98 transitions. [2022-01-10 23:31:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 23:31:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-10 23:31:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:09,407 INFO L225 Difference]: With dead ends: 71 [2022-01-10 23:31:09,407 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 23:31:09,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 23:31:09,413 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 63 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:09,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 41 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:31:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 23:31:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-10 23:31:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-10 23:31:09,443 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-01-10 23:31:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:09,443 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-10 23:31:09,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-10 23:31:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 23:31:09,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:09,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:09,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 23:31:09,445 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1704052781, now seen corresponding path program 1 times [2022-01-10 23:31:09,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:09,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278101927] [2022-01-10 23:31:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:09,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:31:09,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278101927] [2022-01-10 23:31:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278101927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:31:09,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:31:09,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 23:31:09,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308256279] [2022-01-10 23:31:09,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:31:09,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 23:31:09,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 23:31:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 23:31:09,624 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:09,871 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-01-10 23:31:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 23:31:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 23:31:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:09,874 INFO L225 Difference]: With dead ends: 34 [2022-01-10 23:31:09,874 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 23:31:09,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 23:31:09,875 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:09,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:31:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 23:31:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 23:31:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-10 23:31:09,880 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-01-10 23:31:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:09,880 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-10 23:31:09,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-10 23:31:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 23:31:09,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:09,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:09,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 23:31:09,881 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:09,882 INFO L85 PathProgramCache]: Analyzing trace with hash -638489484, now seen corresponding path program 1 times [2022-01-10 23:31:09,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:09,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852803616] [2022-01-10 23:31:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:09,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:10,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:31:10,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:10,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852803616] [2022-01-10 23:31:10,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852803616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:31:10,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:31:10,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 23:31:10,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336013641] [2022-01-10 23:31:10,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:31:10,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 23:31:10,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 23:31:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 23:31:10,444 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:11,315 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-01-10 23:31:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 23:31:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 23:31:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:11,316 INFO L225 Difference]: With dead ends: 39 [2022-01-10 23:31:11,316 INFO L226 Difference]: Without dead ends: 34 [2022-01-10 23:31:11,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-10 23:31:11,319 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:11,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 51 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 23:31:11,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-10 23:31:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-01-10 23:31:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:11,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-10 23:31:11,328 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 24 [2022-01-10 23:31:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:11,328 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-10 23:31:11,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-10 23:31:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 23:31:11,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:11,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 23:31:11,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash -609860333, now seen corresponding path program 1 times [2022-01-10 23:31:11,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805206191] [2022-01-10 23:31:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:11,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:31:11,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:11,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805206191] [2022-01-10 23:31:11,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805206191] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:31:11,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:31:11,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 23:31:11,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047628430] [2022-01-10 23:31:11,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:31:11,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 23:31:11,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 23:31:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 23:31:11,429 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:11,646 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-01-10 23:31:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 23:31:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-10 23:31:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:11,649 INFO L225 Difference]: With dead ends: 36 [2022-01-10 23:31:11,649 INFO L226 Difference]: Without dead ends: 28 [2022-01-10 23:31:11,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 23:31:11,650 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:11,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 23:31:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-10 23:31:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-10 23:31:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-10 23:31:11,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2022-01-10 23:31:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:11,657 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-10 23:31:11,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-10 23:31:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 23:31:11,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:11,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:11,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 23:31:11,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1966048170, now seen corresponding path program 1 times [2022-01-10 23:31:11,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044571682] [2022-01-10 23:31:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:11,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:31:12,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044571682] [2022-01-10 23:31:12,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044571682] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:31:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348687231] [2022-01-10 23:31:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:12,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:31:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:31:12,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 23:31:13,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 23:31:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 23:31:13,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:31:13,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-10 23:31:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 23:31:13,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:31:13,637 INFO L353 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-01-10 23:31:13,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 28 [2022-01-10 23:31:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 23:31:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348687231] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:31:13,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:31:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 22 [2022-01-10 23:31:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409955835] [2022-01-10 23:31:13,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:31:13,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-10 23:31:13,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-10 23:31:13,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-10 23:31:13,681 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:16,256 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-01-10 23:31:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 23:31:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 23:31:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:16,258 INFO L225 Difference]: With dead ends: 46 [2022-01-10 23:31:16,258 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 23:31:16,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=333, Invalid=1149, Unknown=0, NotChecked=0, Total=1482 [2022-01-10 23:31:16,259 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 173 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:16,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 90 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 23:31:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 23:31:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-01-10 23:31:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-10 23:31:16,265 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 27 [2022-01-10 23:31:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:16,266 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-10 23:31:16,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-10 23:31:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 23:31:16,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:16,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:16,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 23:31:16,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:31:16,488 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:16,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:16,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1994677321, now seen corresponding path program 1 times [2022-01-10 23:31:16,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:16,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111321680] [2022-01-10 23:31:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:16,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:31:16,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111321680] [2022-01-10 23:31:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111321680] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:31:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362143387] [2022-01-10 23:31:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:16,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:31:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:31:16,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 23:31:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 23:31:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 23:31:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:31:17,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 23:31:17,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-01-10 23:31:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 23:31:17,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:31:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:31:18,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362143387] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:31:18,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:31:18,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 12] total 26 [2022-01-10 23:31:18,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426737915] [2022-01-10 23:31:18,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:31:18,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-10 23:31:18,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-10 23:31:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-10 23:31:18,082 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:18,992 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-01-10 23:31:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 23:31:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 23:31:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:18,993 INFO L225 Difference]: With dead ends: 45 [2022-01-10 23:31:18,993 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 23:31:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2022-01-10 23:31:18,995 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:18,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 82 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 23:31:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 23:31:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-01-10 23:31:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-10 23:31:19,002 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2022-01-10 23:31:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:19,003 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-10 23:31:19,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-10 23:31:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 23:31:19,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:19,004 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:19,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-10 23:31:19,211 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,SelfDestructingSolverStorable5 [2022-01-10 23:31:19,211 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -127484116, now seen corresponding path program 2 times [2022-01-10 23:31:19,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:19,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596898127] [2022-01-10 23:31:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:19,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:31:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:31:20,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:31:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596898127] [2022-01-10 23:31:20,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596898127] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:31:20,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068041949] [2022-01-10 23:31:20,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 23:31:20,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:31:20,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:31:20,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 23:31:20,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 23:31:21,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 23:31:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 23:31:21,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-10 23:31:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:31:21,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-01-10 23:31:21,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 23:31:21,851 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-10 23:31:21,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2022-01-10 23:31:21,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2022-01-10 23:31:21,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-01-10 23:31:21,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-10 23:31:22,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-01-10 23:31:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 23:31:22,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 23:31:22,212 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-10 23:31:22,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 18 [2022-01-10 23:31:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 23:31:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:31:22,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 23:31:22,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-10 23:31:22,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 23:31:22,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-01-10 23:31:22,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 23:31:22,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 57 [2022-01-10 23:31:22,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 23:31:22,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2022-01-10 23:31:23,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-10 23:31:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 23:31:23,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068041949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:31:23,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:31:23,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 37 [2022-01-10 23:31:23,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252408060] [2022-01-10 23:31:23,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:31:23,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-10 23:31:23,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:31:23,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-10 23:31:23,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1222, Unknown=2, NotChecked=0, Total=1332 [2022-01-10 23:31:23,417 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:31:25,725 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-01-10 23:31:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 23:31:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-10 23:31:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:31:25,726 INFO L225 Difference]: With dead ends: 52 [2022-01-10 23:31:25,726 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 23:31:25,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=356, Invalid=2504, Unknown=2, NotChecked=0, Total=2862 [2022-01-10 23:31:25,728 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 23:31:25,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 140 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 297 Invalid, 0 Unknown, 90 Unchecked, 1.1s Time] [2022-01-10 23:31:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 23:31:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-10 23:31:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-01-10 23:31:25,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 31 [2022-01-10 23:31:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:31:25,737 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-01-10 23:31:25,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:31:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-01-10 23:31:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-10 23:31:25,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:31:25,738 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:31:25,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 23:31:25,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:31:25,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:31:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:31:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1273251607, now seen corresponding path program 3 times [2022-01-10 23:31:25,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:31:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988025371] [2022-01-10 23:31:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:31:25,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:31:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat