/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 02:32:33,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 02:32:33,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 02:32:33,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 02:32:33,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 02:32:33,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 02:32:33,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 02:32:33,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 02:32:33,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 02:32:33,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 02:32:33,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 02:32:33,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 02:32:33,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 02:32:33,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 02:32:33,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 02:32:33,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 02:32:33,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 02:32:34,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 02:32:34,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 02:32:34,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 02:32:34,010 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-10 02:32:34,042 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 02:32:34,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 02:32:34,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 02:32:34,043 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 02:32:34,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 02:32:34,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 02:32:34,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 02:32:34,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 02:32:34,044 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 02:32:34,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 02:32:34,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 02:32:34,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 02:32:34,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 02:32:34,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 02:32:34,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:32:34,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 02:32:34,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 02:32:34,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 02:32:34,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 02:32:34,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 02:32:34,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 02:32:34,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 02:32:34,348 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 02:32:34,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2022-01-10 02:32:34,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f5849f0/f97afbdedeb64dc18c56baf3342905fa/FLAGd297e7591 [2022-01-10 02:32:34,886 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 02:32:34,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2022-01-10 02:32:34,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f5849f0/f97afbdedeb64dc18c56baf3342905fa/FLAGd297e7591 [2022-01-10 02:32:35,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50f5849f0/f97afbdedeb64dc18c56baf3342905fa [2022-01-10 02:32:35,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 02:32:35,238 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 02:32:35,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 02:32:35,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 02:32:35,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 02:32:35,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b4f642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35, skipping insertion in model container [2022-01-10 02:32:35,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 02:32:35,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 02:32:35,438 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[913,926] [2022-01-10 02:32:35,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[5977,5990] [2022-01-10 02:32:35,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:32:35,601 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 02:32:35,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[913,926] [2022-01-10 02:32:35,642 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[5977,5990] [2022-01-10 02:32:35,696 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 02:32:35,722 INFO L208 MainTranslator]: Completed translation [2022-01-10 02:32:35,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35 WrapperNode [2022-01-10 02:32:35,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 02:32:35,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 02:32:35,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 02:32:35,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 02:32:35,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,818 INFO L137 Inliner]: procedures = 68, calls = 79, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 944 [2022-01-10 02:32:35,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 02:32:35,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 02:32:35,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 02:32:35,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 02:32:35,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 02:32:35,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 02:32:35,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 02:32:35,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 02:32:35,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (1/1) ... [2022-01-10 02:32:35,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 02:32:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:35,953 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 02:32:35,959 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 02:32:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 02:32:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 02:32:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 02:32:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-01-10 02:32:35,986 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-01-10 02:32:35,986 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 02:32:35,987 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 02:32:35,987 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 02:32:35,988 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 02:32:35,989 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 02:32:35,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 02:32:35,989 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 02:32:35,992 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 02:32:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 02:32:35,993 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 02:32:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 02:32:35,993 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 02:32:35,993 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 02:32:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 02:32:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 02:32:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 02:32:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 02:32:35,994 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 02:32:35,994 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 02:32:36,110 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 02:32:36,125 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 02:32:36,960 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 02:32:36,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 02:32:36,975 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2022-01-10 02:32:36,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:36 BoogieIcfgContainer [2022-01-10 02:32:36,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 02:32:36,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 02:32:36,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 02:32:36,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 02:32:36,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:32:35" (1/3) ... [2022-01-10 02:32:36,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8b227a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:32:36, skipping insertion in model container [2022-01-10 02:32:36,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:32:35" (2/3) ... [2022-01-10 02:32:36,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8b227a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:32:36, skipping insertion in model container [2022-01-10 02:32:36,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:32:36" (3/3) ... [2022-01-10 02:32:36,984 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2022-01-10 02:32:36,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 02:32:36,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 02:32:37,032 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 02:32:37,038 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 02:32:37,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 02:32:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 412 states, 367 states have (on average 1.6457765667574933) internal successors, (604), 374 states have internal predecessors, (604), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-10 02:32:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 02:32:37,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:37,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:37,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1419459075, now seen corresponding path program 1 times [2022-01-10 02:32:37,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:37,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373208748] [2022-01-10 02:32:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:37,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:37,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:37,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-10 02:32:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:37,321 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 02:32:37,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373208748] [2022-01-10 02:32:37,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373208748] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:37,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:37,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:32:37,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194221110] [2022-01-10 02:32:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:37,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:37,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:32:37,364 INFO L87 Difference]: Start difference. First operand has 412 states, 367 states have (on average 1.6457765667574933) internal successors, (604), 374 states have internal predecessors, (604), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:32:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:37,957 INFO L93 Difference]: Finished difference Result 809 states and 1309 transitions. [2022-01-10 02:32:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:32:37,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-01-10 02:32:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:37,979 INFO L225 Difference]: With dead ends: 809 [2022-01-10 02:32:37,979 INFO L226 Difference]: Without dead ends: 410 [2022-01-10 02:32:37,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 02:32:37,992 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 348 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:37,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 1215 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 02:32:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-10 02:32:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 401. [2022-01-10 02:32:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 359 states have (on average 1.551532033426184) internal successors, (557), 363 states have internal predecessors, (557), 32 states have call successors, (32), 10 states have call predecessors, (32), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-01-10 02:32:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 617 transitions. [2022-01-10 02:32:38,064 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 617 transitions. Word has length 44 [2022-01-10 02:32:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:38,064 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 617 transitions. [2022-01-10 02:32:38,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-10 02:32:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 617 transitions. [2022-01-10 02:32:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 02:32:38,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:38,067 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 02:32:38,067 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:38,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1503700923, now seen corresponding path program 1 times [2022-01-10 02:32:38,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:38,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38616732] [2022-01-10 02:32:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:38,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-10 02:32:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,140 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 02:32:38,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38616732] [2022-01-10 02:32:38,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38616732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:38,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:38,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:32:38,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629564906] [2022-01-10 02:32:38,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:38,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:38,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:32:38,144 INFO L87 Difference]: Start difference. First operand 401 states and 617 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:32:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:38,365 INFO L93 Difference]: Finished difference Result 531 states and 800 transitions. [2022-01-10 02:32:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:32:38,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-10 02:32:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:38,374 INFO L225 Difference]: With dead ends: 531 [2022-01-10 02:32:38,374 INFO L226 Difference]: Without dead ends: 469 [2022-01-10 02:32:38,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 02:32:38,376 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 829 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:38,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 999 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 02:32:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-10 02:32:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 463. [2022-01-10 02:32:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 414 states have (on average 1.5241545893719808) internal successors, (631), 419 states have internal predecessors, (631), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-01-10 02:32:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 705 transitions. [2022-01-10 02:32:38,433 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 705 transitions. Word has length 44 [2022-01-10 02:32:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:38,433 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 705 transitions. [2022-01-10 02:32:38,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:32:38,433 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 705 transitions. [2022-01-10 02:32:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 02:32:38,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:38,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:38,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 02:32:38,435 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1980433208, now seen corresponding path program 1 times [2022-01-10 02:32:38,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395525624] [2022-01-10 02:32:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:38,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 02:32:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,516 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 02:32:38,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:38,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395525624] [2022-01-10 02:32:38,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395525624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:38,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:38,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:32:38,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410360965] [2022-01-10 02:32:38,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:38,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:38,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:38,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:32:38,519 INFO L87 Difference]: Start difference. First operand 463 states and 705 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:32:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:38,687 INFO L93 Difference]: Finished difference Result 723 states and 1075 transitions. [2022-01-10 02:32:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:32:38,688 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 02:32:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:38,692 INFO L225 Difference]: With dead ends: 723 [2022-01-10 02:32:38,692 INFO L226 Difference]: Without dead ends: 599 [2022-01-10 02:32:38,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 02:32:38,698 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 846 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:38,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1006 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:32:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-10 02:32:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 574. [2022-01-10 02:32:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 512 states have (on average 1.484375) internal successors, (760), 518 states have internal predecessors, (760), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2022-01-10 02:32:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 856 transitions. [2022-01-10 02:32:38,734 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 856 transitions. Word has length 45 [2022-01-10 02:32:38,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:38,735 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 856 transitions. [2022-01-10 02:32:38,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:32:38,736 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 856 transitions. [2022-01-10 02:32:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 02:32:38,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:38,744 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:38,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 02:32:38,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1030176627, now seen corresponding path program 1 times [2022-01-10 02:32:38,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:38,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369205707] [2022-01-10 02:32:38,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:38,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-10 02:32:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:38,849 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 02:32:38,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:38,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369205707] [2022-01-10 02:32:38,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369205707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:38,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:38,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:32:38,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574161492] [2022-01-10 02:32:38,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:38,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:38,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:32:38,853 INFO L87 Difference]: Start difference. First operand 574 states and 856 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:32:39,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:39,225 INFO L93 Difference]: Finished difference Result 1023 states and 1456 transitions. [2022-01-10 02:32:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:32:39,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 02:32:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:39,232 INFO L225 Difference]: With dead ends: 1023 [2022-01-10 02:32:39,232 INFO L226 Difference]: Without dead ends: 788 [2022-01-10 02:32:39,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 02:32:39,243 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 325 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:39,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 1320 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:32:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-01-10 02:32:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 672. [2022-01-10 02:32:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 601 states have (on average 1.4608985024958403) internal successors, (878), 609 states have internal predecessors, (878), 48 states have call successors, (48), 21 states have call predecessors, (48), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2022-01-10 02:32:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 980 transitions. [2022-01-10 02:32:39,286 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 980 transitions. Word has length 45 [2022-01-10 02:32:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:39,286 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 980 transitions. [2022-01-10 02:32:39,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 02:32:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 980 transitions. [2022-01-10 02:32:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 02:32:39,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:39,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:39,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 02:32:39,289 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:39,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:39,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1097869046, now seen corresponding path program 1 times [2022-01-10 02:32:39,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:39,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271325432] [2022-01-10 02:32:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:39,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-10 02:32:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-10 02:32:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 02:32:39,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:39,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271325432] [2022-01-10 02:32:39,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271325432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:39,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:39,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:32:39,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455945227] [2022-01-10 02:32:39,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:39,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:39,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:32:39,384 INFO L87 Difference]: Start difference. First operand 672 states and 980 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:32:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:39,763 INFO L93 Difference]: Finished difference Result 1211 states and 1699 transitions. [2022-01-10 02:32:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:32:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-01-10 02:32:39,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:39,770 INFO L225 Difference]: With dead ends: 1211 [2022-01-10 02:32:39,770 INFO L226 Difference]: Without dead ends: 878 [2022-01-10 02:32:39,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:32:39,772 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 313 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:39,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 1373 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 02:32:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-01-10 02:32:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 840. [2022-01-10 02:32:39,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 748 states have (on average 1.410427807486631) internal successors, (1055), 758 states have internal predecessors, (1055), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2022-01-10 02:32:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1189 transitions. [2022-01-10 02:32:39,815 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1189 transitions. Word has length 62 [2022-01-10 02:32:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:39,816 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1189 transitions. [2022-01-10 02:32:39,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:32:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1189 transitions. [2022-01-10 02:32:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 02:32:39,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:39,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:39,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 02:32:39,820 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1559344464, now seen corresponding path program 1 times [2022-01-10 02:32:39,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:39,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756430808] [2022-01-10 02:32:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:39,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-10 02:32:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-10 02:32:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 02:32:39,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756430808] [2022-01-10 02:32:39,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756430808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:39,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:39,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 02:32:39,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941138043] [2022-01-10 02:32:39,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:39,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:39,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 02:32:39,900 INFO L87 Difference]: Start difference. First operand 840 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 02:32:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:40,061 INFO L93 Difference]: Finished difference Result 1469 states and 2011 transitions. [2022-01-10 02:32:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 02:32:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-10 02:32:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:40,066 INFO L225 Difference]: With dead ends: 1469 [2022-01-10 02:32:40,067 INFO L226 Difference]: Without dead ends: 1015 [2022-01-10 02:32:40,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:32:40,068 INFO L933 BasicCegarLoop]: 633 mSDtfsCounter, 825 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:40,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [849 Valid, 1019 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:32:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-01-10 02:32:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 960. [2022-01-10 02:32:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 855 states have (on average 1.3812865497076023) internal successors, (1181), 867 states have internal predecessors, (1181), 66 states have call successors, (66), 33 states have call predecessors, (66), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-01-10 02:32:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1331 transitions. [2022-01-10 02:32:40,108 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1331 transitions. Word has length 67 [2022-01-10 02:32:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:40,108 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1331 transitions. [2022-01-10 02:32:40,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 02:32:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1331 transitions. [2022-01-10 02:32:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 02:32:40,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:40,110 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:40,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 02:32:40,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1116930715, now seen corresponding path program 1 times [2022-01-10 02:32:40,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:40,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001829404] [2022-01-10 02:32:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:40,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:40,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:40,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:32:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:40,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-10 02:32:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:32:40,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:40,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001829404] [2022-01-10 02:32:40,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001829404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:40,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644173056] [2022-01-10 02:32:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:40,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:40,215 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 02:32:40,215 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 02:32:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:40,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 02:32:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:32:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:32:40,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:32:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:32:40,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644173056] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:40,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 02:32:40,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-01-10 02:32:40,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890518638] [2022-01-10 02:32:40,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:40,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 02:32:40,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 02:32:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:40,604 INFO L87 Difference]: Start difference. First operand 960 states and 1331 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:32:40,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:40,788 INFO L93 Difference]: Finished difference Result 1016 states and 1399 transitions. [2022-01-10 02:32:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 02:32:40,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-10 02:32:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:40,794 INFO L225 Difference]: With dead ends: 1016 [2022-01-10 02:32:40,794 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 02:32:40,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-10 02:32:40,795 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:40,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 712 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 02:32:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 02:32:40,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 959. [2022-01-10 02:32:40,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 855 states have (on average 1.3789473684210527) internal successors, (1179), 866 states have internal predecessors, (1179), 65 states have call successors, (65), 33 states have call predecessors, (65), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-01-10 02:32:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1328 transitions. [2022-01-10 02:32:40,835 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1328 transitions. Word has length 68 [2022-01-10 02:32:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:40,836 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1328 transitions. [2022-01-10 02:32:40,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 02:32:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1328 transitions. [2022-01-10 02:32:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 02:32:40,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:40,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:40,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 02:32:41,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:41,066 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:41,067 INFO L85 PathProgramCache]: Analyzing trace with hash 263839635, now seen corresponding path program 1 times [2022-01-10 02:32:41,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:41,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146644209] [2022-01-10 02:32:41,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:41,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:41,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:32:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:41,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-10 02:32:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 02:32:41,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:41,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146644209] [2022-01-10 02:32:41,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146644209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:41,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528066061] [2022-01-10 02:32:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:41,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:41,170 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 02:32:41,171 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 02:32:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 02:32:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:32:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 02:32:41,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 02:32:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:32:41,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528066061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 02:32:41,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 02:32:41,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-01-10 02:32:41,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132562069] [2022-01-10 02:32:41,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 02:32:41,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 02:32:41,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:41,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 02:32:41,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:32:41,765 INFO L87 Difference]: Start difference. First operand 959 states and 1328 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 02:32:43,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:43,420 INFO L93 Difference]: Finished difference Result 2659 states and 3548 transitions. [2022-01-10 02:32:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-10 02:32:43,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-01-10 02:32:43,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:43,430 INFO L225 Difference]: With dead ends: 2659 [2022-01-10 02:32:43,430 INFO L226 Difference]: Without dead ends: 2115 [2022-01-10 02:32:43,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-01-10 02:32:43,433 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1182 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 3912 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:43,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1213 Valid, 3912 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 02:32:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-01-10 02:32:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1348. [2022-01-10 02:32:43,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1205 states have (on average 1.3385892116182572) internal successors, (1613), 1224 states have internal predecessors, (1613), 85 states have call successors, (85), 47 states have call predecessors, (85), 56 states have return successors, (118), 77 states have call predecessors, (118), 82 states have call successors, (118) [2022-01-10 02:32:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1816 transitions. [2022-01-10 02:32:43,510 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1816 transitions. Word has length 69 [2022-01-10 02:32:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:43,510 INFO L470 AbstractCegarLoop]: Abstraction has 1348 states and 1816 transitions. [2022-01-10 02:32:43,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-10 02:32:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1816 transitions. [2022-01-10 02:32:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 02:32:43,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:43,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:32:43,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 02:32:43,735 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,SelfDestructingSolverStorable7 [2022-01-10 02:32:43,736 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1486258056, now seen corresponding path program 1 times [2022-01-10 02:32:43,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:43,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074449973] [2022-01-10 02:32:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:43,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:43,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:43,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:32:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:43,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-10 02:32:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:43,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-10 02:32:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 02:32:43,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:43,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074449973] [2022-01-10 02:32:43,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074449973] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780928523] [2022-01-10 02:32:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:43,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:43,830 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 02:32:43,831 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 02:32:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:43,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 02:32:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:32:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 02:32:44,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:32:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780928523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:44,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:32:44,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-10 02:32:44,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461690831] [2022-01-10 02:32:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:44,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:32:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:32:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:44,101 INFO L87 Difference]: Start difference. First operand 1348 states and 1816 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:32:44,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:44,172 INFO L93 Difference]: Finished difference Result 2071 states and 2754 transitions. [2022-01-10 02:32:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:32:44,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-01-10 02:32:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:44,178 INFO L225 Difference]: With dead ends: 2071 [2022-01-10 02:32:44,178 INFO L226 Difference]: Without dead ends: 1226 [2022-01-10 02:32:44,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:44,181 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 578 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:44,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 717 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:32:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-01-10 02:32:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1211. [2022-01-10 02:32:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1084 states have (on average 1.3422509225092252) internal successors, (1455), 1102 states have internal predecessors, (1455), 77 states have call successors, (77), 41 states have call predecessors, (77), 48 states have return successors, (104), 68 states have call predecessors, (104), 74 states have call successors, (104) [2022-01-10 02:32:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1636 transitions. [2022-01-10 02:32:44,239 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1636 transitions. Word has length 88 [2022-01-10 02:32:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:44,239 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1636 transitions. [2022-01-10 02:32:44,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 02:32:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1636 transitions. [2022-01-10 02:32:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 02:32:44,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:44,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:44,269 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 02:32:44,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:44,464 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 125293381, now seen corresponding path program 1 times [2022-01-10 02:32:44,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:44,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004309481] [2022-01-10 02:32:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:44,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-10 02:32:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-10 02:32:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-10 02:32:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-10 02:32:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-10 02:32:44,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004309481] [2022-01-10 02:32:44,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004309481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 02:32:44,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955667930] [2022-01-10 02:32:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:44,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 02:32:44,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 02:32:44,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 02:32:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:44,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 02:32:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 02:32:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 02:32:44,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 02:32:44,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955667930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:44,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 02:32:44,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-10 02:32:44,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699982960] [2022-01-10 02:32:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:44,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 02:32:44,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 02:32:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:44,825 INFO L87 Difference]: Start difference. First operand 1211 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 02:32:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:44,878 INFO L93 Difference]: Finished difference Result 1480 states and 1977 transitions. [2022-01-10 02:32:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 02:32:44,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-01-10 02:32:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:44,886 INFO L225 Difference]: With dead ends: 1480 [2022-01-10 02:32:44,886 INFO L226 Difference]: Without dead ends: 335 [2022-01-10 02:32:44,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:44,889 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 59 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:44,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1252 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 02:32:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-10 02:32:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-01-10 02:32:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.576158940397351) internal successors, (476), 304 states have internal predecessors, (476), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-10 02:32:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 526 transitions. [2022-01-10 02:32:44,902 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 526 transitions. Word has length 103 [2022-01-10 02:32:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:44,902 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 526 transitions. [2022-01-10 02:32:44,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 02:32:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 526 transitions. [2022-01-10 02:32:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:44,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:44,906 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:44,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 02:32:45,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 02:32:45,120 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash 638824151, now seen corresponding path program 1 times [2022-01-10 02:32:45,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:45,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759986022] [2022-01-10 02:32:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:45,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:45,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:45,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:45,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:45,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:45,248 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 02:32:45,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:45,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759986022] [2022-01-10 02:32:45,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759986022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:45,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:45,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:32:45,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847712837] [2022-01-10 02:32:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:45,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:32:45,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:45,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:32:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:32:45,250 INFO L87 Difference]: Start difference. First operand 335 states and 526 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:46,312 INFO L93 Difference]: Finished difference Result 782 states and 1248 transitions. [2022-01-10 02:32:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:32:46,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:32:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:46,316 INFO L225 Difference]: With dead ends: 782 [2022-01-10 02:32:46,316 INFO L226 Difference]: Without dead ends: 455 [2022-01-10 02:32:46,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:46,317 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 893 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:46,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 935 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 02:32:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-10 02:32:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 335. [2022-01-10 02:32:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.5728476821192052) internal successors, (475), 304 states have internal predecessors, (475), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-10 02:32:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 525 transitions. [2022-01-10 02:32:46,337 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 525 transitions. Word has length 157 [2022-01-10 02:32:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:46,337 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 525 transitions. [2022-01-10 02:32:46,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 525 transitions. [2022-01-10 02:32:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:46,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:46,339 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:46,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 02:32:46,339 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash 903471641, now seen corresponding path program 1 times [2022-01-10 02:32:46,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693796417] [2022-01-10 02:32:46,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:46,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:46,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:46,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:46,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:46,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:46,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:46,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:46,449 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 02:32:46,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693796417] [2022-01-10 02:32:46,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693796417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:46,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:46,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 02:32:46,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227673386] [2022-01-10 02:32:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:46,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 02:32:46,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 02:32:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 02:32:46,453 INFO L87 Difference]: Start difference. First operand 335 states and 525 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:47,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:47,551 INFO L93 Difference]: Finished difference Result 774 states and 1231 transitions. [2022-01-10 02:32:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 02:32:47,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:32:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:47,554 INFO L225 Difference]: With dead ends: 774 [2022-01-10 02:32:47,554 INFO L226 Difference]: Without dead ends: 455 [2022-01-10 02:32:47,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 02:32:47,556 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 884 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:47,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 933 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 02:32:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-10 02:32:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 335. [2022-01-10 02:32:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.5695364238410596) internal successors, (474), 304 states have internal predecessors, (474), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-10 02:32:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 524 transitions. [2022-01-10 02:32:47,582 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 524 transitions. Word has length 157 [2022-01-10 02:32:47,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:47,582 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 524 transitions. [2022-01-10 02:32:47,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 524 transitions. [2022-01-10 02:32:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:47,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:47,584 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:47,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 02:32:47,584 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:47,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash 492861275, now seen corresponding path program 1 times [2022-01-10 02:32:47,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:47,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617403980] [2022-01-10 02:32:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:47,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:47,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:47,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:47,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:47,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:47,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:47,717 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 02:32:47,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:47,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617403980] [2022-01-10 02:32:47,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617403980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:47,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:47,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 02:32:47,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265479295] [2022-01-10 02:32:47,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:47,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 02:32:47,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 02:32:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 02:32:47,719 INFO L87 Difference]: Start difference. First operand 335 states and 524 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:49,855 INFO L93 Difference]: Finished difference Result 1221 states and 1955 transitions. [2022-01-10 02:32:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 02:32:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:32:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:49,859 INFO L225 Difference]: With dead ends: 1221 [2022-01-10 02:32:49,859 INFO L226 Difference]: Without dead ends: 905 [2022-01-10 02:32:49,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:32:49,861 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 1338 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:49,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1355 Valid, 1477 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-10 02:32:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-01-10 02:32:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 664. [2022-01-10 02:32:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 605 states have (on average 1.5834710743801652) internal successors, (958), 608 states have internal predecessors, (958), 45 states have call successors, (45), 13 states have call predecessors, (45), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2022-01-10 02:32:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1049 transitions. [2022-01-10 02:32:49,903 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1049 transitions. Word has length 157 [2022-01-10 02:32:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:49,903 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1049 transitions. [2022-01-10 02:32:49,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1049 transitions. [2022-01-10 02:32:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:49,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:49,905 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:49,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 02:32:49,905 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:49,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1158896471, now seen corresponding path program 1 times [2022-01-10 02:32:49,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:49,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006554436] [2022-01-10 02:32:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:49,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:49,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:49,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:50,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:50,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:50,042 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 02:32:50,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:50,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006554436] [2022-01-10 02:32:50,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006554436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:50,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:32:50,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416923253] [2022-01-10 02:32:50,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:50,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:32:50,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:50,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:32:50,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:50,044 INFO L87 Difference]: Start difference. First operand 664 states and 1049 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:52,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:52,765 INFO L93 Difference]: Finished difference Result 2014 states and 3231 transitions. [2022-01-10 02:32:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:32:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:32:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:52,771 INFO L225 Difference]: With dead ends: 2014 [2022-01-10 02:32:52,771 INFO L226 Difference]: Without dead ends: 1369 [2022-01-10 02:32:52,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:32:52,774 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 1363 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:52,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1380 Valid, 2585 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-10 02:32:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-01-10 02:32:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 970. [2022-01-10 02:32:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 885 states have (on average 1.577401129943503) internal successors, (1396), 889 states have internal predecessors, (1396), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2022-01-10 02:32:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1527 transitions. [2022-01-10 02:32:52,838 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1527 transitions. Word has length 157 [2022-01-10 02:32:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:52,838 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 1527 transitions. [2022-01-10 02:32:52,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1527 transitions. [2022-01-10 02:32:52,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:52,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:52,840 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:52,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 02:32:52,840 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117223, now seen corresponding path program 1 times [2022-01-10 02:32:52,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:52,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854731891] [2022-01-10 02:32:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:52,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:52,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:52,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:52,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:52,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:52,981 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 02:32:52,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:52,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854731891] [2022-01-10 02:32:52,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854731891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:52,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:52,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:32:52,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953989837] [2022-01-10 02:32:52,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:52,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:32:52,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:52,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:32:52,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:52,983 INFO L87 Difference]: Start difference. First operand 970 states and 1527 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:55,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:55,614 INFO L93 Difference]: Finished difference Result 3182 states and 5097 transitions. [2022-01-10 02:32:55,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:32:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:32:55,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:55,625 INFO L225 Difference]: With dead ends: 3182 [2022-01-10 02:32:55,625 INFO L226 Difference]: Without dead ends: 2231 [2022-01-10 02:32:55,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:32:55,629 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 1356 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:55,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 2575 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 02:32:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-01-10 02:32:55,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1586. [2022-01-10 02:32:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1449 states have (on average 1.572808833678399) internal successors, (2279), 1455 states have internal predecessors, (2279), 102 states have call successors, (102), 31 states have call predecessors, (102), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2022-01-10 02:32:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2494 transitions. [2022-01-10 02:32:55,747 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2494 transitions. Word has length 157 [2022-01-10 02:32:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:55,747 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 2494 transitions. [2022-01-10 02:32:55,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:55,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2494 transitions. [2022-01-10 02:32:55,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:55,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:55,753 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:55,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 02:32:55,753 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1373650725, now seen corresponding path program 1 times [2022-01-10 02:32:55,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:55,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400424411] [2022-01-10 02:32:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:55,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:55,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:55,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:55,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:55,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:55,893 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 02:32:55,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:55,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400424411] [2022-01-10 02:32:55,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400424411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:55,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:55,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:32:55,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966277776] [2022-01-10 02:32:55,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:55,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:32:55,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:32:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:55,895 INFO L87 Difference]: Start difference. First operand 1586 states and 2494 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:32:58,620 INFO L93 Difference]: Finished difference Result 5436 states and 8676 transitions. [2022-01-10 02:32:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:32:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:32:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:32:58,638 INFO L225 Difference]: With dead ends: 5436 [2022-01-10 02:32:58,638 INFO L226 Difference]: Without dead ends: 3869 [2022-01-10 02:32:58,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:32:58,644 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 1355 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:32:58,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 2570 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 02:32:58,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2022-01-10 02:32:58,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 2819. [2022-01-10 02:32:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.569045771916214) internal successors, (4045), 2588 states have internal predecessors, (4045), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-01-10 02:32:58,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4434 transitions. [2022-01-10 02:32:58,866 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4434 transitions. Word has length 157 [2022-01-10 02:32:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:32:58,866 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4434 transitions. [2022-01-10 02:32:58,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:32:58,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4434 transitions. [2022-01-10 02:32:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:32:58,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:32:58,869 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:32:58,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 02:32:58,870 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:32:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:32:58,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1084831335, now seen corresponding path program 1 times [2022-01-10 02:32:58,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:32:58,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019225674] [2022-01-10 02:32:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:32:58,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:32:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:58,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:32:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:58,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:32:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:59,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:32:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:59,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:32:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:32:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:32:59,027 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 02:32:59,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:32:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019225674] [2022-01-10 02:32:59,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019225674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:32:59,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:32:59,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:32:59,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977386525] [2022-01-10 02:32:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:32:59,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:32:59,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:32:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:32:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:32:59,030 INFO L87 Difference]: Start difference. First operand 2819 states and 4434 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:00,611 INFO L93 Difference]: Finished difference Result 6690 states and 10683 transitions. [2022-01-10 02:33:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:33:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:00,628 INFO L225 Difference]: With dead ends: 6690 [2022-01-10 02:33:00,628 INFO L226 Difference]: Without dead ends: 3890 [2022-01-10 02:33:00,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:33:00,636 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 970 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:00,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 1394 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 02:33:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-01-10 02:33:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 2819. [2022-01-10 02:33:00,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.5655546935609) internal successors, (4036), 2588 states have internal predecessors, (4036), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-01-10 02:33:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4425 transitions. [2022-01-10 02:33:00,868 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4425 transitions. Word has length 157 [2022-01-10 02:33:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:00,868 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4425 transitions. [2022-01-10 02:33:00,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4425 transitions. [2022-01-10 02:33:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:00,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:00,871 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:00,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 02:33:00,871 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:00,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1629703909, now seen corresponding path program 1 times [2022-01-10 02:33:00,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:00,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788452591] [2022-01-10 02:33:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:00,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:00,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:00,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:00,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:00,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:01,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:01,007 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 02:33:01,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788452591] [2022-01-10 02:33:01,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788452591] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:01,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:01,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:01,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317132360] [2022-01-10 02:33:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:01,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:01,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:01,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:01,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:01,009 INFO L87 Difference]: Start difference. First operand 2819 states and 4425 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:02,268 INFO L93 Difference]: Finished difference Result 6680 states and 10636 transitions. [2022-01-10 02:33:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:33:02,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:02,297 INFO L225 Difference]: With dead ends: 6680 [2022-01-10 02:33:02,297 INFO L226 Difference]: Without dead ends: 3880 [2022-01-10 02:33:02,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:33:02,307 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 1111 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:02,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 1213 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:33:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2022-01-10 02:33:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 2819. [2022-01-10 02:33:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.5620636152055858) internal successors, (4027), 2588 states have internal predecessors, (4027), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-01-10 02:33:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4416 transitions. [2022-01-10 02:33:02,613 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4416 transitions. Word has length 157 [2022-01-10 02:33:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:02,613 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4416 transitions. [2022-01-10 02:33:02,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4416 transitions. [2022-01-10 02:33:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:02,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:02,616 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 02:33:02,617 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:02,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:02,617 INFO L85 PathProgramCache]: Analyzing trace with hash -954543783, now seen corresponding path program 1 times [2022-01-10 02:33:02,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:02,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249061799] [2022-01-10 02:33:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:02,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:02,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:02,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:02,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:02,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:02,741 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 02:33:02,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:02,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249061799] [2022-01-10 02:33:02,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249061799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:02,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:02,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:02,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163933131] [2022-01-10 02:33:02,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:02,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:02,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:02,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:02,744 INFO L87 Difference]: Start difference. First operand 2819 states and 4416 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:04,090 INFO L93 Difference]: Finished difference Result 6670 states and 10589 transitions. [2022-01-10 02:33:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:33:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:04,105 INFO L225 Difference]: With dead ends: 6670 [2022-01-10 02:33:04,105 INFO L226 Difference]: Without dead ends: 3870 [2022-01-10 02:33:04,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:33:04,113 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 1109 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:04,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1209 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 02:33:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-01-10 02:33:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 2819. [2022-01-10 02:33:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.5585725368502716) internal successors, (4018), 2588 states have internal predecessors, (4018), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-01-10 02:33:04,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4407 transitions. [2022-01-10 02:33:04,341 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4407 transitions. Word has length 157 [2022-01-10 02:33:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:04,341 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4407 transitions. [2022-01-10 02:33:04,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4407 transitions. [2022-01-10 02:33:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:04,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:04,343 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 02:33:04,344 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1902595749, now seen corresponding path program 1 times [2022-01-10 02:33:04,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:04,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316018321] [2022-01-10 02:33:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:04,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:04,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:04,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:04,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:04,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:04,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:04,471 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 02:33:04,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:04,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316018321] [2022-01-10 02:33:04,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316018321] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:04,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:04,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:04,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035418106] [2022-01-10 02:33:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:04,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:04,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:04,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:04,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:04,474 INFO L87 Difference]: Start difference. First operand 2819 states and 4407 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:07,231 INFO L93 Difference]: Finished difference Result 9913 states and 15658 transitions. [2022-01-10 02:33:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 02:33:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:07,256 INFO L225 Difference]: With dead ends: 9913 [2022-01-10 02:33:07,256 INFO L226 Difference]: Without dead ends: 7113 [2022-01-10 02:33:07,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-01-10 02:33:07,268 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 1333 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:07,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1350 Valid, 2547 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 02:33:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-01-10 02:33:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 5319. [2022-01-10 02:33:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 4870 states have (on average 1.5535934291581108) internal successors, (7566), 4888 states have internal predecessors, (7566), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2022-01-10 02:33:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 8321 transitions. [2022-01-10 02:33:07,807 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 8321 transitions. Word has length 157 [2022-01-10 02:33:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:07,808 INFO L470 AbstractCegarLoop]: Abstraction has 5319 states and 8321 transitions. [2022-01-10 02:33:07,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 8321 transitions. [2022-01-10 02:33:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:07,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:07,812 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:07,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 02:33:07,813 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:07,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1807599897, now seen corresponding path program 1 times [2022-01-10 02:33:07,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:07,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159429860] [2022-01-10 02:33:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:07,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:07,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:07,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:07,960 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 02:33:07,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159429860] [2022-01-10 02:33:07,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159429860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:07,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:07,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:07,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214345434] [2022-01-10 02:33:07,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:07,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:07,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:07,962 INFO L87 Difference]: Start difference. First operand 5319 states and 8321 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:09,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:09,521 INFO L93 Difference]: Finished difference Result 12474 states and 19764 transitions. [2022-01-10 02:33:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 02:33:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:09,546 INFO L225 Difference]: With dead ends: 12474 [2022-01-10 02:33:09,546 INFO L226 Difference]: Without dead ends: 7174 [2022-01-10 02:33:09,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-01-10 02:33:09,562 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 1111 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:09,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 1200 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 02:33:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7174 states. [2022-01-10 02:33:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7174 to 5319. [2022-01-10 02:33:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 4870 states have (on average 1.5501026694045175) internal successors, (7549), 4888 states have internal predecessors, (7549), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2022-01-10 02:33:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 8304 transitions. [2022-01-10 02:33:10,075 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 8304 transitions. Word has length 157 [2022-01-10 02:33:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:10,076 INFO L470 AbstractCegarLoop]: Abstraction has 5319 states and 8304 transitions. [2022-01-10 02:33:10,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 8304 transitions. [2022-01-10 02:33:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:10,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:10,086 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:10,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 02:33:10,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:10,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1373094299, now seen corresponding path program 1 times [2022-01-10 02:33:10,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:10,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554340040] [2022-01-10 02:33:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:10,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:10,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:10,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:10,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:10,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:10,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:10,219 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 02:33:10,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554340040] [2022-01-10 02:33:10,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554340040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:10,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:10,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:10,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240728132] [2022-01-10 02:33:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:10,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:10,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:10,223 INFO L87 Difference]: Start difference. First operand 5319 states and 8304 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:14,273 INFO L93 Difference]: Finished difference Result 21279 states and 33424 transitions. [2022-01-10 02:33:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 02:33:14,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:14,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:14,326 INFO L225 Difference]: With dead ends: 21279 [2022-01-10 02:33:14,326 INFO L226 Difference]: Without dead ends: 15979 [2022-01-10 02:33:14,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-10 02:33:14,345 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 1732 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:14,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1760 Valid, 2520 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-10 02:33:14,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15979 states. [2022-01-10 02:33:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15979 to 10314. [2022-01-10 02:33:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 9465 states have (on average 1.5487585842577918) internal successors, (14659), 9499 states have internal predecessors, (14659), 618 states have call successors, (618), 199 states have call predecessors, (618), 230 states have return successors, (891), 647 states have call predecessors, (891), 616 states have call successors, (891) [2022-01-10 02:33:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 16168 transitions. [2022-01-10 02:33:15,323 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 16168 transitions. Word has length 157 [2022-01-10 02:33:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:15,323 INFO L470 AbstractCegarLoop]: Abstraction has 10314 states and 16168 transitions. [2022-01-10 02:33:15,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 16168 transitions. [2022-01-10 02:33:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:15,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:15,332 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:15,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-10 02:33:15,332 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 666497693, now seen corresponding path program 1 times [2022-01-10 02:33:15,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146778536] [2022-01-10 02:33:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:15,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:15,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:15,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:15,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:15,458 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 02:33:15,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:15,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146778536] [2022-01-10 02:33:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146778536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:15,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:15,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:15,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911559860] [2022-01-10 02:33:15,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:15,460 INFO L87 Difference]: Start difference. First operand 10314 states and 16168 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 02:33:22,033 INFO L93 Difference]: Finished difference Result 41168 states and 64906 transitions. [2022-01-10 02:33:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-10 02:33:22,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 02:33:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 02:33:22,143 INFO L225 Difference]: With dead ends: 41168 [2022-01-10 02:33:22,144 INFO L226 Difference]: Without dead ends: 30873 [2022-01-10 02:33:22,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-10 02:33:22,182 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 1415 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 02:33:22,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1431 Valid, 2667 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 02:33:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30873 states. [2022-01-10 02:33:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30873 to 19963. [2022-01-10 02:33:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19963 states, 18330 states have (on average 1.5444080741953083) internal successors, (28309), 18396 states have internal predecessors, (28309), 1178 states have call successors, (1178), 391 states have call predecessors, (1178), 454 states have return successors, (1969), 1239 states have call predecessors, (1969), 1176 states have call successors, (1969) [2022-01-10 02:33:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19963 states to 19963 states and 31456 transitions. [2022-01-10 02:33:24,156 INFO L78 Accepts]: Start accepts. Automaton has 19963 states and 31456 transitions. Word has length 157 [2022-01-10 02:33:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 02:33:24,156 INFO L470 AbstractCegarLoop]: Abstraction has 19963 states and 31456 transitions. [2022-01-10 02:33:24,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 02:33:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 19963 states and 31456 transitions. [2022-01-10 02:33:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 02:33:24,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 02:33:24,167 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 02:33:24,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 02:33:24,168 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 02:33:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 02:33:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1613535579, now seen corresponding path program 1 times [2022-01-10 02:33:24,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 02:33:24,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260908410] [2022-01-10 02:33:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 02:33:24,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 02:33:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:24,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-01-10 02:33:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:24,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-01-10 02:33:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:24,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-10 02:33:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:24,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-10 02:33:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-10 02:33:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 02:33:24,291 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 02:33:24,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 02:33:24,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260908410] [2022-01-10 02:33:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260908410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 02:33:24,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 02:33:24,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 02:33:24,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525170951] [2022-01-10 02:33:24,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 02:33:24,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 02:33:24,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 02:33:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 02:33:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 02:33:24,293 INFO L87 Difference]: Start difference. First operand 19963 states and 31456 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)