/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/systemc/kundu.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:04:36,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:04:36,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:04:36,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 01:04:36,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 01:04:36,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 01:04:36,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 01:04:36,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 01:04:36,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 01:04:36,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 01:04:36,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 01:04:36,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 01:04:36,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 01:04:36,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 01:04:36,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 01:04:36,101 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 01:04:36,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 01:04:36,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 01:04:36,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 01:04:36,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 01:04:36,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 01:04:36,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 01:04:36,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 01:04:36,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 01:04:36,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 01:04:36,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 01:04:36,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 01:04:36,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 01:04:36,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 01:04:36,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 01:04:36,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 01:04:36,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 01:04:36,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 01:04:36,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 01:04:36,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 01:04:36,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 01:04:36,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 01:04:36,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 01:04:36,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:04:36,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:04:36,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:04:36,123 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 01:04:36,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:04:36,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:04:36,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:04:36,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:04:36,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:04:36,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:04:36,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:04:36,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:04:36,148 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:04:36,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:04:36,149 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:04:36,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:04:36,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:04:36,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:04:36,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:04:36,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:04:36,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:04:36,150 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:04:36,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:04:36,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:04:36,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:04:36,151 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:04:36,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:04:36,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:04:36,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:04:36,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:04:36,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:04:36,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:04:36,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:04:36,328 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:04:36,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu.cil.c [2022-01-10 01:04:36,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0aa88fc1/690f9bb420dc4e88b3574b335d2dd7e9/FLAG1d058d03e [2022-01-10 01:04:36,700 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:04:36,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c [2022-01-10 01:04:36,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0aa88fc1/690f9bb420dc4e88b3574b335d2dd7e9/FLAG1d058d03e [2022-01-10 01:04:37,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0aa88fc1/690f9bb420dc4e88b3574b335d2dd7e9 [2022-01-10 01:04:37,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:04:37,115 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:04:37,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:04:37,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:04:37,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:04:37,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f9b792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37, skipping insertion in model container [2022-01-10 01:04:37,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:04:37,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:04:37,291 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2022-01-10 01:04:37,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:04:37,404 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:04:37,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu.cil.c[635,648] [2022-01-10 01:04:37,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:04:37,468 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:04:37,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37 WrapperNode [2022-01-10 01:04:37,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:04:37,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:04:37,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:04:37,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:04:37,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,537 INFO L137 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 315 [2022-01-10 01:04:37,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:04:37,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:04:37,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:04:37,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:04:37,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:04:37,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:04:37,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:04:37,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:04:37,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (1/1) ... [2022-01-10 01:04:37,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:04:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:04:37,635 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 01:04:37,637 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 01:04:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:04:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-01-10 01:04:37,680 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-01-10 01:04:37,681 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 01:04:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 01:04:37,681 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-01-10 01:04:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-01-10 01:04:37,682 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-01-10 01:04:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-01-10 01:04:37,682 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-01-10 01:04:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-01-10 01:04:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-01-10 01:04:37,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-01-10 01:04:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:04:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-01-10 01:04:37,685 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-01-10 01:04:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:04:37,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:04:37,745 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:04:37,746 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:04:38,052 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:04:38,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:04:38,058 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 01:04:38,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:04:38 BoogieIcfgContainer [2022-01-10 01:04:38,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:04:38,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:04:38,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:04:38,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:04:38,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:04:37" (1/3) ... [2022-01-10 01:04:38,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b6f1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:04:38, skipping insertion in model container [2022-01-10 01:04:38,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:04:37" (2/3) ... [2022-01-10 01:04:38,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49b6f1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:04:38, skipping insertion in model container [2022-01-10 01:04:38,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:04:38" (3/3) ... [2022-01-10 01:04:38,079 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2022-01-10 01:04:38,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:04:38,083 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:04:38,128 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:04:38,133 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 01:04:38,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:04:38,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 108 states have (on average 1.5185185185185186) internal successors, (164), 112 states have internal predecessors, (164), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-10 01:04:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 01:04:38,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:38,167 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] [2022-01-10 01:04:38,168 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -2012698059, now seen corresponding path program 1 times [2022-01-10 01:04:38,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:38,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941406175] [2022-01-10 01:04:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:38,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:38,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-10 01:04:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-10 01:04:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,372 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 01:04:38,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:38,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941406175] [2022-01-10 01:04:38,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941406175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:38,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:38,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:04:38,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202041399] [2022-01-10 01:04:38,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:38,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:04:38,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:04:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:04:38,399 INFO L87 Difference]: Start difference. First operand has 135 states, 108 states have (on average 1.5185185185185186) internal successors, (164), 112 states have internal predecessors, (164), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:38,573 INFO L93 Difference]: Finished difference Result 279 states and 421 transitions. [2022-01-10 01:04:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:04:38,575 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 01:04:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:38,582 INFO L225 Difference]: With dead ends: 279 [2022-01-10 01:04:38,582 INFO L226 Difference]: Without dead ends: 146 [2022-01-10 01:04:38,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 01:04:38,586 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 221 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:38,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 312 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-10 01:04:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2022-01-10 01:04:38,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 106 states have internal predecessors, (149), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 01:04:38,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 182 transitions. [2022-01-10 01:04:38,653 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 182 transitions. Word has length 59 [2022-01-10 01:04:38,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:38,654 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 182 transitions. [2022-01-10 01:04:38,654 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 182 transitions. [2022-01-10 01:04:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 01:04:38,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:38,656 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] [2022-01-10 01:04:38,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:04:38,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 743929207, now seen corresponding path program 1 times [2022-01-10 01:04:38,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:38,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744938691] [2022-01-10 01:04:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:38,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-10 01:04:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-10 01:04:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:38,763 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 01:04:38,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:38,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744938691] [2022-01-10 01:04:38,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744938691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:38,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:04:38,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317720346] [2022-01-10 01:04:38,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:38,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:04:38,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:38,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:04:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:38,768 INFO L87 Difference]: Start difference. First operand 128 states and 182 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:39,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:39,039 INFO L93 Difference]: Finished difference Result 395 states and 569 transitions. [2022-01-10 01:04:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:04:39,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 01:04:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:39,043 INFO L225 Difference]: With dead ends: 395 [2022-01-10 01:04:39,043 INFO L226 Difference]: Without dead ends: 278 [2022-01-10 01:04:39,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:04:39,044 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 389 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:39,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 846 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:04:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-10 01:04:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 236. [2022-01-10 01:04:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 194 states have (on average 1.4381443298969072) internal successors, (279), 198 states have internal predecessors, (279), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 01:04:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 334 transitions. [2022-01-10 01:04:39,087 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 334 transitions. Word has length 59 [2022-01-10 01:04:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:39,088 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 334 transitions. [2022-01-10 01:04:39,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 334 transitions. [2022-01-10 01:04:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 01:04:39,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:39,093 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] [2022-01-10 01:04:39,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:04:39,094 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1652507784, now seen corresponding path program 1 times [2022-01-10 01:04:39,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:39,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046329688] [2022-01-10 01:04:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:39,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-10 01:04:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-10 01:04:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,245 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 01:04:39,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046329688] [2022-01-10 01:04:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046329688] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:39,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:39,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:39,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413926366] [2022-01-10 01:04:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:39,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:39,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:39,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:39,248 INFO L87 Difference]: Start difference. First operand 236 states and 334 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:39,450 INFO L93 Difference]: Finished difference Result 533 states and 774 transitions. [2022-01-10 01:04:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:04:39,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 01:04:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:39,455 INFO L225 Difference]: With dead ends: 533 [2022-01-10 01:04:39,455 INFO L226 Difference]: Without dead ends: 308 [2022-01-10 01:04:39,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-10 01:04:39,464 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 183 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:39,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 867 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:39,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-10 01:04:39,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2022-01-10 01:04:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.4263959390862944) internal successors, (281), 201 states have internal predecessors, (281), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 01:04:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 336 transitions. [2022-01-10 01:04:39,492 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 336 transitions. Word has length 59 [2022-01-10 01:04:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:39,492 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 336 transitions. [2022-01-10 01:04:39,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 336 transitions. [2022-01-10 01:04:39,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 01:04:39,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:39,493 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] [2022-01-10 01:04:39,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 01:04:39,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:39,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:39,494 INFO L85 PathProgramCache]: Analyzing trace with hash 797092346, now seen corresponding path program 1 times [2022-01-10 01:04:39,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:39,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797576007] [2022-01-10 01:04:39,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:39,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-10 01:04:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-10 01:04:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,619 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 01:04:39,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:39,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797576007] [2022-01-10 01:04:39,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797576007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:39,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:39,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:39,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756294940] [2022-01-10 01:04:39,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:39,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:39,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:39,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:39,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:39,620 INFO L87 Difference]: Start difference. First operand 239 states and 336 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:39,771 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2022-01-10 01:04:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 01:04:39,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 01:04:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:39,773 INFO L225 Difference]: With dead ends: 553 [2022-01-10 01:04:39,773 INFO L226 Difference]: Without dead ends: 325 [2022-01-10 01:04:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:04:39,787 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 196 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:39,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 773 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-10 01:04:39,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 245. [2022-01-10 01:04:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 203 states have (on average 1.4137931034482758) internal successors, (287), 207 states have internal predecessors, (287), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 01:04:39,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 342 transitions. [2022-01-10 01:04:39,813 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 342 transitions. Word has length 59 [2022-01-10 01:04:39,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:39,813 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 342 transitions. [2022-01-10 01:04:39,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 342 transitions. [2022-01-10 01:04:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 01:04:39,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:39,814 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] [2022-01-10 01:04:39,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 01:04:39,814 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash 724705788, now seen corresponding path program 1 times [2022-01-10 01:04:39,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:39,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077143008] [2022-01-10 01:04:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:39,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-01-10 01:04:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-10 01:04:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:39,876 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 01:04:39,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:39,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077143008] [2022-01-10 01:04:39,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077143008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:39,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:39,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:39,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885117366] [2022-01-10 01:04:39,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:39,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:39,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:39,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:39,877 INFO L87 Difference]: Start difference. First operand 245 states and 342 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:40,266 INFO L93 Difference]: Finished difference Result 1013 states and 1453 transitions. [2022-01-10 01:04:40,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:04:40,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 01:04:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:40,281 INFO L225 Difference]: With dead ends: 1013 [2022-01-10 01:04:40,281 INFO L226 Difference]: Without dead ends: 779 [2022-01-10 01:04:40,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-10 01:04:40,283 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 775 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:40,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 1030 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 01:04:40,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-10 01:04:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 459. [2022-01-10 01:04:40,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 383 states have (on average 1.4046997389033942) internal successors, (538), 389 states have internal predecessors, (538), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2022-01-10 01:04:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 640 transitions. [2022-01-10 01:04:40,336 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 640 transitions. Word has length 59 [2022-01-10 01:04:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:40,336 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 640 transitions. [2022-01-10 01:04:40,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:40,336 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 640 transitions. [2022-01-10 01:04:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 01:04:40,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:40,337 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] [2022-01-10 01:04:40,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 01:04:40,337 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1658073077, now seen corresponding path program 1 times [2022-01-10 01:04:40,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:40,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420915711] [2022-01-10 01:04:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:40,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,396 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 01:04:40,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:40,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420915711] [2022-01-10 01:04:40,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420915711] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:40,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:40,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:40,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620542171] [2022-01-10 01:04:40,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:40,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:40,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:40,397 INFO L87 Difference]: Start difference. First operand 459 states and 640 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:40,564 INFO L93 Difference]: Finished difference Result 1008 states and 1458 transitions. [2022-01-10 01:04:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-10 01:04:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-01-10 01:04:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:40,567 INFO L225 Difference]: With dead ends: 1008 [2022-01-10 01:04:40,567 INFO L226 Difference]: Without dead ends: 560 [2022-01-10 01:04:40,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:04:40,568 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 75 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:40,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 757 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-10 01:04:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 471. [2022-01-10 01:04:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 395 states have (on average 1.3924050632911393) internal successors, (550), 401 states have internal predecessors, (550), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (51), 45 states have call predecessors, (51), 48 states have call successors, (51) [2022-01-10 01:04:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 652 transitions. [2022-01-10 01:04:40,600 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 652 transitions. Word has length 60 [2022-01-10 01:04:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:40,600 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 652 transitions. [2022-01-10 01:04:40,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 01:04:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 652 transitions. [2022-01-10 01:04:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 01:04:40,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:40,601 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] [2022-01-10 01:04:40,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:04:40,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash -713666185, now seen corresponding path program 1 times [2022-01-10 01:04:40,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:40,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097553804] [2022-01-10 01:04:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:40,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:40,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:40,641 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 01:04:40,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:40,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097553804] [2022-01-10 01:04:40,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097553804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:40,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:40,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:40,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272631179] [2022-01-10 01:04:40,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:40,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:40,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:40,642 INFO L87 Difference]: Start difference. First operand 471 states and 652 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 01:04:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:40,882 INFO L93 Difference]: Finished difference Result 1484 states and 2066 transitions. [2022-01-10 01:04:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 01:04:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-01-10 01:04:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:40,887 INFO L225 Difference]: With dead ends: 1484 [2022-01-10 01:04:40,887 INFO L226 Difference]: Without dead ends: 1025 [2022-01-10 01:04:40,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-01-10 01:04:40,890 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 251 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:40,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 810 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:40,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-01-10 01:04:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 879. [2022-01-10 01:04:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 739 states have (on average 1.3843031123139378) internal successors, (1023), 753 states have internal predecessors, (1023), 91 states have call successors, (91), 49 states have call predecessors, (91), 48 states have return successors, (93), 77 states have call predecessors, (93), 88 states have call successors, (93) [2022-01-10 01:04:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1207 transitions. [2022-01-10 01:04:40,959 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1207 transitions. Word has length 60 [2022-01-10 01:04:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:40,960 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 1207 transitions. [2022-01-10 01:04:40,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 01:04:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1207 transitions. [2022-01-10 01:04:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 01:04:40,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:40,962 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:40,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 01:04:40,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash 196410881, now seen corresponding path program 1 times [2022-01-10 01:04:40,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:40,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676217976] [2022-01-10 01:04:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:40,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:41,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676217976] [2022-01-10 01:04:41,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676217976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:04:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813700064] [2022-01-10 01:04:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:41,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:04:41,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:04:41,080 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 01:04:41,113 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 01:04:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-10 01:04:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:04:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:41,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:04:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:41,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813700064] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 01:04:41,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 01:04:41,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 8 [2022-01-10 01:04:41,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608312116] [2022-01-10 01:04:41,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:41,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:41,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:04:41,499 INFO L87 Difference]: Start difference. First operand 879 states and 1207 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 01:04:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:41,693 INFO L93 Difference]: Finished difference Result 2439 states and 3369 transitions. [2022-01-10 01:04:41,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 01:04:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-01-10 01:04:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:41,699 INFO L225 Difference]: With dead ends: 2439 [2022-01-10 01:04:41,699 INFO L226 Difference]: Without dead ends: 1671 [2022-01-10 01:04:41,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-10 01:04:41,701 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 293 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:41,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 1342 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-01-10 01:04:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1642. [2022-01-10 01:04:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1386 states have (on average 1.3816738816738816) internal successors, (1915), 1409 states have internal predecessors, (1915), 165 states have call successors, (165), 91 states have call predecessors, (165), 90 states have return successors, (172), 142 states have call predecessors, (172), 162 states have call successors, (172) [2022-01-10 01:04:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2252 transitions. [2022-01-10 01:04:41,792 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2252 transitions. Word has length 71 [2022-01-10 01:04:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:41,793 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2252 transitions. [2022-01-10 01:04:41,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 01:04:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2252 transitions. [2022-01-10 01:04:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 01:04:41,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:41,794 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] [2022-01-10 01:04:41,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 01:04:42,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:04:42,010 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:42,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1792983441, now seen corresponding path program 1 times [2022-01-10 01:04:42,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:42,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013730218] [2022-01-10 01:04:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:42,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,123 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 01:04:42,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013730218] [2022-01-10 01:04:42,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013730218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:42,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:42,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:04:42,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442505330] [2022-01-10 01:04:42,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:42,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:04:42,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:04:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:42,124 INFO L87 Difference]: Start difference. First operand 1642 states and 2252 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:04:42,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:42,590 INFO L93 Difference]: Finished difference Result 5206 states and 7235 transitions. [2022-01-10 01:04:42,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 01:04:42,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-01-10 01:04:42,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:42,602 INFO L225 Difference]: With dead ends: 5206 [2022-01-10 01:04:42,602 INFO L226 Difference]: Without dead ends: 3576 [2022-01-10 01:04:42,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:04:42,606 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 381 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:42,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 760 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:04:42,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3576 states. [2022-01-10 01:04:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3576 to 3256. [2022-01-10 01:04:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3256 states, 2779 states have (on average 1.3609211946743434) internal successors, (3782), 2820 states have internal predecessors, (3782), 292 states have call successors, (292), 170 states have call predecessors, (292), 184 states have return successors, (401), 267 states have call predecessors, (401), 289 states have call successors, (401) [2022-01-10 01:04:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3256 states to 3256 states and 4475 transitions. [2022-01-10 01:04:42,832 INFO L78 Accepts]: Start accepts. Automaton has 3256 states and 4475 transitions. Word has length 73 [2022-01-10 01:04:42,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:42,832 INFO L470 AbstractCegarLoop]: Abstraction has 3256 states and 4475 transitions. [2022-01-10 01:04:42,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 4 states have internal predecessors, (60), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:04:42,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3256 states and 4475 transitions. [2022-01-10 01:04:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 01:04:42,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:42,834 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] [2022-01-10 01:04:42,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 01:04:42,834 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:42,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash 815804017, now seen corresponding path program 1 times [2022-01-10 01:04:42,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:42,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537843001] [2022-01-10 01:04:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:42,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:42,866 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 01:04:42,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537843001] [2022-01-10 01:04:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537843001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:42,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:42,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:04:42,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168543409] [2022-01-10 01:04:42,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:42,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:04:42,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:42,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:04:42,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:42,868 INFO L87 Difference]: Start difference. First operand 3256 states and 4475 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:04:43,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:43,161 INFO L93 Difference]: Finished difference Result 6861 states and 9459 transitions. [2022-01-10 01:04:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:04:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-01-10 01:04:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:43,172 INFO L225 Difference]: With dead ends: 6861 [2022-01-10 01:04:43,172 INFO L226 Difference]: Without dead ends: 3616 [2022-01-10 01:04:43,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:04:43,180 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 306 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:43,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 342 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2022-01-10 01:04:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 3251. [2022-01-10 01:04:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2777 states have (on average 1.3604609290601368) internal successors, (3778), 2817 states have internal predecessors, (3778), 289 states have call successors, (289), 170 states have call predecessors, (289), 184 states have return successors, (397), 264 states have call predecessors, (397), 286 states have call successors, (397) [2022-01-10 01:04:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4464 transitions. [2022-01-10 01:04:43,366 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4464 transitions. Word has length 73 [2022-01-10 01:04:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:43,366 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4464 transitions. [2022-01-10 01:04:43,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:04:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4464 transitions. [2022-01-10 01:04:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 01:04:43,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:43,367 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] [2022-01-10 01:04:43,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 01:04:43,367 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:43,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2040025620, now seen corresponding path program 1 times [2022-01-10 01:04:43,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346766412] [2022-01-10 01:04:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:43,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:43,406 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 01:04:43,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346766412] [2022-01-10 01:04:43,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346766412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:43,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:43,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:04:43,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793300650] [2022-01-10 01:04:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:43,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:04:43,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:43,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:04:43,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:04:43,407 INFO L87 Difference]: Start difference. First operand 3251 states and 4464 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 01:04:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:43,917 INFO L93 Difference]: Finished difference Result 9419 states and 13042 transitions. [2022-01-10 01:04:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:04:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 74 [2022-01-10 01:04:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:43,936 INFO L225 Difference]: With dead ends: 9419 [2022-01-10 01:04:43,936 INFO L226 Difference]: Without dead ends: 6179 [2022-01-10 01:04:43,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:04:43,944 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 377 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:43,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 511 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:04:43,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6179 states. [2022-01-10 01:04:44,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6179 to 5119. [2022-01-10 01:04:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5119 states, 4336 states have (on average 1.3279520295202951) internal successors, (5758), 4400 states have internal predecessors, (5758), 475 states have call successors, (475), 283 states have call predecessors, (475), 307 states have return successors, (665), 436 states have call predecessors, (665), 472 states have call successors, (665) [2022-01-10 01:04:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5119 states to 5119 states and 6898 transitions. [2022-01-10 01:04:44,250 INFO L78 Accepts]: Start accepts. Automaton has 5119 states and 6898 transitions. Word has length 74 [2022-01-10 01:04:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:44,250 INFO L470 AbstractCegarLoop]: Abstraction has 5119 states and 6898 transitions. [2022-01-10 01:04:44,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 01:04:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5119 states and 6898 transitions. [2022-01-10 01:04:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 01:04:44,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:44,251 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] [2022-01-10 01:04:44,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:04:44,251 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:44,251 INFO L85 PathProgramCache]: Analyzing trace with hash 71967124, now seen corresponding path program 1 times [2022-01-10 01:04:44,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:44,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708901391] [2022-01-10 01:04:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:44,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:44,317 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 01:04:44,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:44,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708901391] [2022-01-10 01:04:44,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708901391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:44,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:44,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 01:04:44,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290484253] [2022-01-10 01:04:44,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:44,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 01:04:44,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 01:04:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:04:44,318 INFO L87 Difference]: Start difference. First operand 5119 states and 6898 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 01:04:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:45,579 INFO L93 Difference]: Finished difference Result 15278 states and 21190 transitions. [2022-01-10 01:04:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 01:04:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-01-10 01:04:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:45,653 INFO L225 Difference]: With dead ends: 15278 [2022-01-10 01:04:45,653 INFO L226 Difference]: Without dead ends: 10347 [2022-01-10 01:04:45,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-01-10 01:04:45,694 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 809 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1332 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:45,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 1332 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 01:04:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2022-01-10 01:04:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 7517. [2022-01-10 01:04:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7517 states, 6382 states have (on average 1.3281103102475713) internal successors, (8476), 6462 states have internal predecessors, (8476), 687 states have call successors, (687), 411 states have call predecessors, (687), 447 states have return successors, (971), 644 states have call predecessors, (971), 684 states have call successors, (971) [2022-01-10 01:04:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7517 states to 7517 states and 10134 transitions. [2022-01-10 01:04:46,189 INFO L78 Accepts]: Start accepts. Automaton has 7517 states and 10134 transitions. Word has length 75 [2022-01-10 01:04:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:46,189 INFO L470 AbstractCegarLoop]: Abstraction has 7517 states and 10134 transitions. [2022-01-10 01:04:46,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 01:04:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7517 states and 10134 transitions. [2022-01-10 01:04:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 01:04:46,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:46,191 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 01:04:46,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 01:04:46,191 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:46,191 INFO L85 PathProgramCache]: Analyzing trace with hash -494723516, now seen corresponding path program 1 times [2022-01-10 01:04:46,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:46,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692295043] [2022-01-10 01:04:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:46,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-10 01:04:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 01:04:46,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692295043] [2022-01-10 01:04:46,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692295043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:04:46,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078293424] [2022-01-10 01:04:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:46,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:04:46,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:04:46,228 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 01:04:46,265 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 01:04:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 01:04:46,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:04:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:04:46,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 01:04:46,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078293424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:46,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 01:04:46,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-10 01:04:46,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151738063] [2022-01-10 01:04:46,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:46,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:04:46,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:46,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:04:46,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:46,396 INFO L87 Difference]: Start difference. First operand 7517 states and 10134 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:04:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:47,006 INFO L93 Difference]: Finished difference Result 19768 states and 26912 transitions. [2022-01-10 01:04:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:04:47,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2022-01-10 01:04:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:47,045 INFO L225 Difference]: With dead ends: 19768 [2022-01-10 01:04:47,045 INFO L226 Difference]: Without dead ends: 12263 [2022-01-10 01:04:47,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:04:47,065 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 130 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:47,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 484 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:04:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2022-01-10 01:04:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 11694. [2022-01-10 01:04:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 9881 states have (on average 1.317984009715616) internal successors, (13023), 10011 states have internal predecessors, (13023), 1097 states have call successors, (1097), 657 states have call predecessors, (1097), 715 states have return successors, (1717), 1027 states have call predecessors, (1717), 1094 states have call successors, (1717) [2022-01-10 01:04:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 15837 transitions. [2022-01-10 01:04:47,866 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 15837 transitions. Word has length 79 [2022-01-10 01:04:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:47,866 INFO L470 AbstractCegarLoop]: Abstraction has 11694 states and 15837 transitions. [2022-01-10 01:04:47,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 01:04:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 15837 transitions. [2022-01-10 01:04:47,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 01:04:47,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:47,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:47,899 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 01:04:48,102 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,SelfDestructingSolverStorable12 [2022-01-10 01:04:48,103 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1645371471, now seen corresponding path program 1 times [2022-01-10 01:04:48,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:48,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241203417] [2022-01-10 01:04:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:48,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 01:04:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 01:04:48,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:48,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241203417] [2022-01-10 01:04:48,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241203417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:48,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:48,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:04:48,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276711428] [2022-01-10 01:04:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:48,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:04:48,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:48,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:04:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:04:48,152 INFO L87 Difference]: Start difference. First operand 11694 states and 15837 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:04:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:49,795 INFO L93 Difference]: Finished difference Result 29375 states and 39949 transitions. [2022-01-10 01:04:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-10 01:04:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-01-10 01:04:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:49,927 INFO L225 Difference]: With dead ends: 29375 [2022-01-10 01:04:49,927 INFO L226 Difference]: Without dead ends: 19172 [2022-01-10 01:04:49,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-01-10 01:04:49,996 INFO L933 BasicCegarLoop]: 484 mSDtfsCounter, 790 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:49,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 1322 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 01:04:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19172 states. [2022-01-10 01:04:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19172 to 16112. [2022-01-10 01:04:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16112 states, 13703 states have (on average 1.3265708239071736) internal successors, (18178), 13913 states have internal predecessors, (18178), 1425 states have call successors, (1425), 853 states have call predecessors, (1425), 983 states have return successors, (2443), 1347 states have call predecessors, (2443), 1422 states have call successors, (2443) [2022-01-10 01:04:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16112 states to 16112 states and 22046 transitions. [2022-01-10 01:04:51,268 INFO L78 Accepts]: Start accepts. Automaton has 16112 states and 22046 transitions. Word has length 84 [2022-01-10 01:04:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:51,268 INFO L470 AbstractCegarLoop]: Abstraction has 16112 states and 22046 transitions. [2022-01-10 01:04:51,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:04:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 16112 states and 22046 transitions. [2022-01-10 01:04:51,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 01:04:51,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:51,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:51,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 01:04:51,277 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:51,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1168082145, now seen corresponding path program 1 times [2022-01-10 01:04:51,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:51,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937638225] [2022-01-10 01:04:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:51,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 01:04:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 01:04:51,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:51,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937638225] [2022-01-10 01:04:51,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937638225] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:51,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:51,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-10 01:04:51,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144946791] [2022-01-10 01:04:51,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:51,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 01:04:51,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:51,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 01:04:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:04:51,365 INFO L87 Difference]: Start difference. First operand 16112 states and 22046 transitions. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:04:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:04:54,297 INFO L93 Difference]: Finished difference Result 49472 states and 70036 transitions. [2022-01-10 01:04:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 01:04:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-01-10 01:04:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:04:54,424 INFO L225 Difference]: With dead ends: 49472 [2022-01-10 01:04:54,424 INFO L226 Difference]: Without dead ends: 34851 [2022-01-10 01:04:54,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:04:54,470 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1090 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 2781 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 01:04:54,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 2781 Invalid, 1836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 01:04:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34851 states. [2022-01-10 01:04:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34851 to 23243. [2022-01-10 01:04:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23243 states, 19826 states have (on average 1.331887420558862) internal successors, (26406), 20106 states have internal predecessors, (26406), 2016 states have call successors, (2016), 1207 states have call predecessors, (2016), 1400 states have return successors, (3536), 1931 states have call predecessors, (3536), 2013 states have call successors, (3536) [2022-01-10 01:04:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23243 states to 23243 states and 31958 transitions. [2022-01-10 01:04:56,414 INFO L78 Accepts]: Start accepts. Automaton has 23243 states and 31958 transitions. Word has length 87 [2022-01-10 01:04:56,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:04:56,415 INFO L470 AbstractCegarLoop]: Abstraction has 23243 states and 31958 transitions. [2022-01-10 01:04:56,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:04:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 23243 states and 31958 transitions. [2022-01-10 01:04:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-10 01:04:56,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:04:56,423 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:04:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 01:04:56,423 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:04:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:04:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash 799954536, now seen corresponding path program 1 times [2022-01-10 01:04:56,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:04:56,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900758795] [2022-01-10 01:04:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:04:56,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:04:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:04:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:04:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:04:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:04:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:04:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:04:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-10 01:04:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:04:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 01:04:56,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:04:56,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900758795] [2022-01-10 01:04:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900758795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:04:56,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:04:56,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:04:56,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283524424] [2022-01-10 01:04:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:04:56,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:04:56,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:04:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:04:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:04:56,487 INFO L87 Difference]: Start difference. First operand 23243 states and 31958 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 01:05:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:00,038 INFO L93 Difference]: Finished difference Result 71102 states and 99170 transitions. [2022-01-10 01:05:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 01:05:00,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 95 [2022-01-10 01:05:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:00,179 INFO L225 Difference]: With dead ends: 71102 [2022-01-10 01:05:00,180 INFO L226 Difference]: Without dead ends: 47875 [2022-01-10 01:05:00,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:05:00,225 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 1170 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:00,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1076 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 01:05:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47875 states. [2022-01-10 01:05:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47875 to 44970. [2022-01-10 01:05:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44970 states, 38263 states have (on average 1.3047068970023261) internal successors, (49922), 38798 states have internal predecessors, (49922), 3900 states have call successors, (3900), 2376 states have call predecessors, (3900), 2806 states have return successors, (7008), 3797 states have call predecessors, (7008), 3897 states have call successors, (7008) [2022-01-10 01:05:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44970 states to 44970 states and 60830 transitions. [2022-01-10 01:05:03,187 INFO L78 Accepts]: Start accepts. Automaton has 44970 states and 60830 transitions. Word has length 95 [2022-01-10 01:05:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:03,187 INFO L470 AbstractCegarLoop]: Abstraction has 44970 states and 60830 transitions. [2022-01-10 01:05:03,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 5 states have internal predecessors, (78), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 01:05:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 44970 states and 60830 transitions. [2022-01-10 01:05:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 01:05:03,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:03,192 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 01:05:03,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 01:05:03,192 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:03,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1050949112, now seen corresponding path program 1 times [2022-01-10 01:05:03,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:03,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513997073] [2022-01-10 01:05:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:03,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:05:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:05:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:05:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:05:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:05:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:05:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-10 01:05:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 01:05:03,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513997073] [2022-01-10 01:05:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513997073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:03,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706197810] [2022-01-10 01:05:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:03,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:03,272 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 01:05:03,272 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 01:05:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 01:05:03,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 01:05:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 01:05:03,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 01:05:03,777 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 01:05:03,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706197810] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:03,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 01:05:03,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 7] total 15 [2022-01-10 01:05:03,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712785270] [2022-01-10 01:05:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:03,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 01:05:03,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 01:05:03,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-10 01:05:03,779 INFO L87 Difference]: Start difference. First operand 44970 states and 60830 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:05:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:06,837 INFO L93 Difference]: Finished difference Result 47654 states and 64186 transitions. [2022-01-10 01:05:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 01:05:06,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 96 [2022-01-10 01:05:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:07,075 INFO L225 Difference]: With dead ends: 47654 [2022-01-10 01:05:07,075 INFO L226 Difference]: Without dead ends: 47651 [2022-01-10 01:05:07,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-01-10 01:05:07,098 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 429 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:07,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 976 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47651 states. [2022-01-10 01:05:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47651 to 46066. [2022-01-10 01:05:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46066 states, 39178 states have (on average 1.3019041298688039) internal successors, (51006), 39731 states have internal predecessors, (51006), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2881 states have return successors, (7155), 3893 states have call predecessors, (7155), 4003 states have call successors, (7155) [2022-01-10 01:05:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46066 states to 46066 states and 62167 transitions. [2022-01-10 01:05:09,978 INFO L78 Accepts]: Start accepts. Automaton has 46066 states and 62167 transitions. Word has length 96 [2022-01-10 01:05:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:09,978 INFO L470 AbstractCegarLoop]: Abstraction has 46066 states and 62167 transitions. [2022-01-10 01:05:09,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 7 states have internal predecessors, (77), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:05:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 46066 states and 62167 transitions. [2022-01-10 01:05:09,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 01:05:09,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:09,983 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:10,013 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 01:05:10,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:10,199 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash -536746609, now seen corresponding path program 1 times [2022-01-10 01:05:10,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:10,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447472012] [2022-01-10 01:05:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:10,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:05:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:05:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:05:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:05:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:05:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:05:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 01:05:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-10 01:05:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 01:05:10,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447472012] [2022-01-10 01:05:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447472012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:10,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:10,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 01:05:10,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992918864] [2022-01-10 01:05:10,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:10,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 01:05:10,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:10,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 01:05:10,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 01:05:10,250 INFO L87 Difference]: Start difference. First operand 46066 states and 62167 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 01:05:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:13,838 INFO L93 Difference]: Finished difference Result 95917 states and 129334 transitions. [2022-01-10 01:05:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-10 01:05:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2022-01-10 01:05:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:13,989 INFO L225 Difference]: With dead ends: 95917 [2022-01-10 01:05:13,990 INFO L226 Difference]: Without dead ends: 49867 [2022-01-10 01:05:14,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-01-10 01:05:14,063 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 427 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:14,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 495 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 01:05:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49867 states. [2022-01-10 01:05:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49867 to 45954. [2022-01-10 01:05:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45954 states, 38954 states have (on average 1.293731067412846) internal successors, (50396), 39619 states have internal predecessors, (50396), 4006 states have call successors, (4006), 2443 states have call predecessors, (4006), 2993 states have return successors, (6707), 3893 states have call predecessors, (6707), 4003 states have call successors, (6707) [2022-01-10 01:05:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45954 states to 45954 states and 61109 transitions. [2022-01-10 01:05:17,122 INFO L78 Accepts]: Start accepts. Automaton has 45954 states and 61109 transitions. Word has length 97 [2022-01-10 01:05:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:17,122 INFO L470 AbstractCegarLoop]: Abstraction has 45954 states and 61109 transitions. [2022-01-10 01:05:17,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 01:05:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 45954 states and 61109 transitions. [2022-01-10 01:05:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 01:05:17,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:17,129 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:17,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 01:05:17,129 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1531440307, now seen corresponding path program 1 times [2022-01-10 01:05:17,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867231196] [2022-01-10 01:05:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:17,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:05:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:05:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:05:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:05:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:05:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:05:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 01:05:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-10 01:05:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 01:05:17,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867231196] [2022-01-10 01:05:17,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867231196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:17,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:17,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:05:17,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943254849] [2022-01-10 01:05:17,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:17,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:05:17,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:05:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:05:17,168 INFO L87 Difference]: Start difference. First operand 45954 states and 61109 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:05:20,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:20,256 INFO L93 Difference]: Finished difference Result 52170 states and 69546 transitions. [2022-01-10 01:05:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 01:05:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 97 [2022-01-10 01:05:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:20,401 INFO L225 Difference]: With dead ends: 52170 [2022-01-10 01:05:20,402 INFO L226 Difference]: Without dead ends: 49664 [2022-01-10 01:05:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:05:20,426 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 310 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:20,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 337 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49664 states. [2022-01-10 01:05:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49664 to 45789. [2022-01-10 01:05:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45789 states, 38819 states have (on average 1.2939797521832093) internal successors, (50231), 39482 states have internal predecessors, (50231), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6686), 3874 states have call predecessors, (6686), 3984 states have call successors, (6686) [2022-01-10 01:05:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45789 states to 45789 states and 60904 transitions. [2022-01-10 01:05:23,767 INFO L78 Accepts]: Start accepts. Automaton has 45789 states and 60904 transitions. Word has length 97 [2022-01-10 01:05:23,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:23,768 INFO L470 AbstractCegarLoop]: Abstraction has 45789 states and 60904 transitions. [2022-01-10 01:05:23,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 01:05:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 45789 states and 60904 transitions. [2022-01-10 01:05:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 01:05:23,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:23,772 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:23,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 01:05:23,772 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:23,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:23,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1743423476, now seen corresponding path program 1 times [2022-01-10 01:05:23,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:23,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100158704] [2022-01-10 01:05:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:23,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:05:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:05:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:05:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:05:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:05:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:05:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 01:05:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-10 01:05:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 01:05:23,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:23,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100158704] [2022-01-10 01:05:23,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100158704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:23,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:23,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:05:23,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202816314] [2022-01-10 01:05:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:23,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 01:05:23,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 01:05:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:05:23,822 INFO L87 Difference]: Start difference. First operand 45789 states and 60904 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 01:05:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:27,447 INFO L93 Difference]: Finished difference Result 94432 states and 125632 transitions. [2022-01-10 01:05:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 01:05:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 98 [2022-01-10 01:05:27,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:27,582 INFO L225 Difference]: With dead ends: 94432 [2022-01-10 01:05:27,582 INFO L226 Difference]: Without dead ends: 48655 [2022-01-10 01:05:27,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:05:27,660 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 1260 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:27,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1275 Valid, 1025 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 01:05:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48655 states. [2022-01-10 01:05:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48655 to 45927. [2022-01-10 01:05:30,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45927 states, 38957 states have (on average 1.2860846574428215) internal successors, (50102), 39620 states have internal predecessors, (50102), 3987 states have call successors, (3987), 2433 states have call predecessors, (3987), 2982 states have return successors, (6350), 3874 states have call predecessors, (6350), 3984 states have call successors, (6350) [2022-01-10 01:05:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45927 states to 45927 states and 60439 transitions. [2022-01-10 01:05:30,756 INFO L78 Accepts]: Start accepts. Automaton has 45927 states and 60439 transitions. Word has length 98 [2022-01-10 01:05:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:30,756 INFO L470 AbstractCegarLoop]: Abstraction has 45927 states and 60439 transitions. [2022-01-10 01:05:30,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 01:05:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 45927 states and 60439 transitions. [2022-01-10 01:05:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-10 01:05:30,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:30,764 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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 01:05:30,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 01:05:30,764 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:30,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:30,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1897517852, now seen corresponding path program 1 times [2022-01-10 01:05:30,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:30,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26391510] [2022-01-10 01:05:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:30,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:05:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:05:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:05:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:05:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:05:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-10 01:05:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-10 01:05:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-10 01:05:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-01-10 01:05:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 01:05:30,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:30,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26391510] [2022-01-10 01:05:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26391510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:05:30,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:05:30,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:05:30,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939976723] [2022-01-10 01:05:30,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:05:30,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:05:30,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:05:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:05:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:05:30,805 INFO L87 Difference]: Start difference. First operand 45927 states and 60439 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 01:05:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:05:35,843 INFO L93 Difference]: Finished difference Result 124499 states and 164719 transitions. [2022-01-10 01:05:35,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 01:05:35,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 120 [2022-01-10 01:05:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:05:36,061 INFO L225 Difference]: With dead ends: 124499 [2022-01-10 01:05:36,061 INFO L226 Difference]: Without dead ends: 79685 [2022-01-10 01:05:36,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-10 01:05:36,155 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 396 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:05:36,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 496 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:05:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79685 states. [2022-01-10 01:05:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79685 to 73112. [2022-01-10 01:05:41,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73112 states, 62216 states have (on average 1.2899575671852899) internal successors, (80256), 63292 states have internal predecessors, (80256), 6164 states have call successors, (6164), 3832 states have call predecessors, (6164), 4731 states have return successors, (9893), 5988 states have call predecessors, (9893), 6161 states have call successors, (9893) [2022-01-10 01:05:41,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73112 states to 73112 states and 96313 transitions. [2022-01-10 01:05:41,311 INFO L78 Accepts]: Start accepts. Automaton has 73112 states and 96313 transitions. Word has length 120 [2022-01-10 01:05:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:05:41,311 INFO L470 AbstractCegarLoop]: Abstraction has 73112 states and 96313 transitions. [2022-01-10 01:05:41,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 01:05:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 73112 states and 96313 transitions. [2022-01-10 01:05:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-10 01:05:41,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:05:41,324 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:05:41,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 01:05:41,325 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:05:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:05:41,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1287880011, now seen corresponding path program 1 times [2022-01-10 01:05:41,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:05:41,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184292203] [2022-01-10 01:05:41,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:41,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:05:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-10 01:05:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-10 01:05:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-10 01:05:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-10 01:05:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-10 01:05:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-10 01:05:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-10 01:05:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-10 01:05:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-10 01:05:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-10 01:05:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:05:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 01:05:41,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:05:41,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184292203] [2022-01-10 01:05:41,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184292203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 01:05:41,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55301950] [2022-01-10 01:05:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:05:41,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 01:05:41,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:05:41,392 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 01:05:41,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process