./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/token_ring.04.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:13:35,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:13:35,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:13:35,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:13:35,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:13:35,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:13:35,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:13:35,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:13:35,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:13:35,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:13:35,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:13:35,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:13:35,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:13:35,719 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:13:35,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:13:35,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:13:35,724 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:13:35,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:13:35,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:13:35,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:13:35,733 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:13:35,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:13:35,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:13:35,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:13:35,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:13:35,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:13:35,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:13:35,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:13:35,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:13:35,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:13:35,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:13:35,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:13:35,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:13:35,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:13:35,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:13:35,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:13:35,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:13:35,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:13:35,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:13:35,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:13:35,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:13:35,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:13:35,746 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:13:35,760 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:13:35,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:13:35,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:13:35,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:13:35,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:13:35,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:13:35,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:13:35,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:13:35,762 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:13:35,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:13:35,763 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:13:35,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:13:35,764 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:13:35,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:13:35,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:13:35,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:13:35,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:13:35,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:13:35,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:13:35,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:13:35,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:13:35,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:13:35,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:13:35,765 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:13:35,766 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:13:35,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:13:35,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d3b7d21cc48825b4a0189c75f03d768acc6241312029d3e223c1b9b2a509ea [2022-07-13 18:13:35,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:13:36,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:13:36,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:13:36,022 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:13:36,023 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:13:36,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2022-07-13 18:13:36,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f34fc05a8/4d48e93b68ec4db6b159dddc3f6990d2/FLAG90483c0b8 [2022-07-13 18:13:36,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:13:36,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2022-07-13 18:13:36,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f34fc05a8/4d48e93b68ec4db6b159dddc3f6990d2/FLAG90483c0b8 [2022-07-13 18:13:37,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f34fc05a8/4d48e93b68ec4db6b159dddc3f6990d2 [2022-07-13 18:13:37,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:13:37,143 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:13:37,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:13:37,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:13:37,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:13:37,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a74b953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37, skipping insertion in model container [2022-07-13 18:13:37,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:13:37,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:13:37,373 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2022-07-13 18:13:37,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:13:37,503 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:13:37,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[671,684] [2022-07-13 18:13:37,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:13:37,559 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:13:37,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37 WrapperNode [2022-07-13 18:13:37,560 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:13:37,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:13:37,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:13:37,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:13:37,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,588 INFO L137 Inliner]: procedures = 36, calls = 44, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 394 [2022-07-13 18:13:37,588 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:13:37,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:13:37,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:13:37,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:13:37,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:13:37,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:13:37,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:13:37,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:13:37,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (1/1) ... [2022-07-13 18:13:37,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:13:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:13:37,635 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) [2022-07-13 18:13:37,660 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 [2022-07-13 18:13:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:13:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-13 18:13:37,690 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-13 18:13:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-13 18:13:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-13 18:13:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-13 18:13:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-13 18:13:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 18:13:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 18:13:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-13 18:13:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-13 18:13:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-13 18:13:37,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-13 18:13:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:13:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-13 18:13:37,692 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-13 18:13:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:13:37,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:13:37,767 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:13:37,768 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:13:38,146 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:13:38,157 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:13:38,160 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-13 18:13:38,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:13:38 BoogieIcfgContainer [2022-07-13 18:13:38,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:13:38,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:13:38,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:13:38,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:13:38,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:13:37" (1/3) ... [2022-07-13 18:13:38,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad473a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:13:38, skipping insertion in model container [2022-07-13 18:13:38,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:13:37" (2/3) ... [2022-07-13 18:13:38,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad473a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:13:38, skipping insertion in model container [2022-07-13 18:13:38,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:13:38" (3/3) ... [2022-07-13 18:13:38,171 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2022-07-13 18:13:38,184 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:13:38,184 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:13:38,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:13:38,290 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23109875, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@587daea7 [2022-07-13 18:13:38,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:13:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-13 18:13:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:38,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:38,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:38,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash -256970182, now seen corresponding path program 1 times [2022-07-13 18:13:38,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11254016] [2022-07-13 18:13:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:38,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:38,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:38,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:38,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:38,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:38,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11254016] [2022-07-13 18:13:38,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11254016] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:38,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:38,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:13:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008644732] [2022-07-13 18:13:38,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:38,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:13:38,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:38,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:13:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:13:38,845 INFO L87 Difference]: Start difference. First operand has 190 states, 161 states have (on average 1.6211180124223603) internal successors, (261), 165 states have internal predecessors, (261), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:39,482 INFO L93 Difference]: Finished difference Result 422 states and 678 transitions. [2022-07-13 18:13:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:13:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:39,496 INFO L225 Difference]: With dead ends: 422 [2022-07-13 18:13:39,496 INFO L226 Difference]: Without dead ends: 238 [2022-07-13 18:13:39,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:13:39,503 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 444 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:39,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 511 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:13:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-13 18:13:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 184. [2022-07-13 18:13:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.5286624203821657) internal successors, (240), 159 states have internal predecessors, (240), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-13 18:13:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 278 transitions. [2022-07-13 18:13:39,558 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 278 transitions. Word has length 90 [2022-07-13 18:13:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:39,559 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 278 transitions. [2022-07-13 18:13:39,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 278 transitions. [2022-07-13 18:13:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:39,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:39,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:13:39,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash -497209928, now seen corresponding path program 1 times [2022-07-13 18:13:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:39,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408005459] [2022-07-13 18:13:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:39,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:39,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:39,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:39,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:39,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:39,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:39,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408005459] [2022-07-13 18:13:39,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408005459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:39,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:39,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:13:39,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886844558] [2022-07-13 18:13:39,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:39,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:13:39,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:13:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:13:39,748 INFO L87 Difference]: Start difference. First operand 184 states and 278 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:40,485 INFO L93 Difference]: Finished difference Result 638 states and 989 transitions. [2022-07-13 18:13:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:13:40,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:40,491 INFO L225 Difference]: With dead ends: 638 [2022-07-13 18:13:40,491 INFO L226 Difference]: Without dead ends: 466 [2022-07-13 18:13:40,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:13:40,493 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 649 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:40,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 798 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 18:13:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-13 18:13:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 357. [2022-07-13 18:13:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 310 states have (on average 1.5419354838709678) internal successors, (478), 313 states have internal predecessors, (478), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (34), 31 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-13 18:13:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 545 transitions. [2022-07-13 18:13:40,569 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 545 transitions. Word has length 90 [2022-07-13 18:13:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:40,570 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 545 transitions. [2022-07-13 18:13:40,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 545 transitions. [2022-07-13 18:13:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:40,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:40,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:13:40,573 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1743052724, now seen corresponding path program 1 times [2022-07-13 18:13:40,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:40,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715559663] [2022-07-13 18:13:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:40,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:40,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:40,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:40,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:40,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:40,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:40,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715559663] [2022-07-13 18:13:40,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715559663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:40,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:40,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:40,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717571536] [2022-07-13 18:13:40,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:40,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:40,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:40,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:40,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:40,739 INFO L87 Difference]: Start difference. First operand 357 states and 545 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:41,675 INFO L93 Difference]: Finished difference Result 1041 states and 1611 transitions. [2022-07-13 18:13:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:13:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:41,680 INFO L225 Difference]: With dead ends: 1041 [2022-07-13 18:13:41,681 INFO L226 Difference]: Without dead ends: 696 [2022-07-13 18:13:41,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:13:41,684 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 645 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:41,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1386 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 18:13:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-07-13 18:13:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 519. [2022-07-13 18:13:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 452 states have (on average 1.5353982300884956) internal successors, (694), 456 states have internal predecessors, (694), 46 states have call successors, (46), 19 states have call predecessors, (46), 20 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2022-07-13 18:13:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 789 transitions. [2022-07-13 18:13:41,724 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 789 transitions. Word has length 90 [2022-07-13 18:13:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:41,725 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 789 transitions. [2022-07-13 18:13:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 789 transitions. [2022-07-13 18:13:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:41,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:41,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:41,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:13:41,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash -817810122, now seen corresponding path program 1 times [2022-07-13 18:13:41,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:41,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149713273] [2022-07-13 18:13:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:41,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:41,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:41,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:41,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:41,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149713273] [2022-07-13 18:13:41,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149713273] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:41,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:41,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947775178] [2022-07-13 18:13:41,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:41,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:41,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:41,809 INFO L87 Difference]: Start difference. First operand 519 states and 789 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:42,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:42,682 INFO L93 Difference]: Finished difference Result 1634 states and 2523 transitions. [2022-07-13 18:13:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:13:42,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:42,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:42,688 INFO L225 Difference]: With dead ends: 1634 [2022-07-13 18:13:42,688 INFO L226 Difference]: Without dead ends: 1127 [2022-07-13 18:13:42,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:13:42,691 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 692 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:42,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 957 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 18:13:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-07-13 18:13:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 844. [2022-07-13 18:13:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 737 states have (on average 1.5291723202170964) internal successors, (1127), 743 states have internal predecessors, (1127), 72 states have call successors, (72), 31 states have call predecessors, (72), 34 states have return successors, (83), 73 states have call predecessors, (83), 70 states have call successors, (83) [2022-07-13 18:13:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1282 transitions. [2022-07-13 18:13:42,730 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1282 transitions. Word has length 90 [2022-07-13 18:13:42,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:42,731 INFO L495 AbstractCegarLoop]: Abstraction has 844 states and 1282 transitions. [2022-07-13 18:13:42,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:42,744 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1282 transitions. [2022-07-13 18:13:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:42,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:42,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:42,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:13:42,746 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash 69412724, now seen corresponding path program 1 times [2022-07-13 18:13:42,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:42,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560521494] [2022-07-13 18:13:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:42,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:42,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:42,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:42,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:42,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560521494] [2022-07-13 18:13:42,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560521494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:42,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:42,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181256435] [2022-07-13 18:13:42,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:42,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:42,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:42,840 INFO L87 Difference]: Start difference. First operand 844 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:43,574 INFO L93 Difference]: Finished difference Result 2779 states and 4280 transitions. [2022-07-13 18:13:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:13:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:43,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:43,582 INFO L225 Difference]: With dead ends: 2779 [2022-07-13 18:13:43,582 INFO L226 Difference]: Without dead ends: 1947 [2022-07-13 18:13:43,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:13:43,585 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 637 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:43,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [648 Valid, 1376 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 18:13:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-07-13 18:13:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1495. [2022-07-13 18:13:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1308 states have (on average 1.5237003058103975) internal successors, (1993), 1318 states have internal predecessors, (1993), 124 states have call successors, (124), 55 states have call predecessors, (124), 62 states have return successors, (157), 129 states have call predecessors, (157), 122 states have call successors, (157) [2022-07-13 18:13:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2274 transitions. [2022-07-13 18:13:43,670 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2274 transitions. Word has length 90 [2022-07-13 18:13:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:43,671 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 2274 transitions. [2022-07-13 18:13:43,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2274 transitions. [2022-07-13 18:13:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:43,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:43,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:43,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:13:43,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:43,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1841629834, now seen corresponding path program 1 times [2022-07-13 18:13:43,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:43,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411730482] [2022-07-13 18:13:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:43,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:43,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:43,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:43,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:43,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:43,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411730482] [2022-07-13 18:13:43,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411730482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:43,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:43,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979228331] [2022-07-13 18:13:43,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:43,746 INFO L87 Difference]: Start difference. First operand 1495 states and 2274 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:44,716 INFO L93 Difference]: Finished difference Result 5068 states and 7810 transitions. [2022-07-13 18:13:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 18:13:44,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:44,729 INFO L225 Difference]: With dead ends: 5068 [2022-07-13 18:13:44,729 INFO L226 Difference]: Without dead ends: 3585 [2022-07-13 18:13:44,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 18:13:44,738 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 633 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:44,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 1372 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 18:13:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2022-07-13 18:13:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2802. [2022-07-13 18:13:44,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2455 states have (on average 1.519755600814664) internal successors, (3731), 2473 states have internal predecessors, (3731), 228 states have call successors, (228), 103 states have call predecessors, (228), 118 states have return successors, (323), 241 states have call predecessors, (323), 226 states have call successors, (323) [2022-07-13 18:13:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 4282 transitions. [2022-07-13 18:13:44,845 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 4282 transitions. Word has length 90 [2022-07-13 18:13:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:44,845 INFO L495 AbstractCegarLoop]: Abstraction has 2802 states and 4282 transitions. [2022-07-13 18:13:44,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 4282 transitions. [2022-07-13 18:13:44,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:44,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:44,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:13:44,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:44,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1764729036, now seen corresponding path program 1 times [2022-07-13 18:13:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919217411] [2022-07-13 18:13:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:44,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:44,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:44,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:44,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:44,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:44,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:44,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919217411] [2022-07-13 18:13:44,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919217411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:44,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:44,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:44,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862315997] [2022-07-13 18:13:44,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:44,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:44,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:44,953 INFO L87 Difference]: Start difference. First operand 2802 states and 4282 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:46,154 INFO L93 Difference]: Finished difference Result 10685 states and 16466 transitions. [2022-07-13 18:13:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:13:46,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:46,186 INFO L225 Difference]: With dead ends: 10685 [2022-07-13 18:13:46,186 INFO L226 Difference]: Without dead ends: 7895 [2022-07-13 18:13:46,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:13:46,196 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 803 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:46,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 1358 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 18:13:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2022-07-13 18:13:46,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 5381. [2022-07-13 18:13:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5381 states, 4730 states have (on average 1.5207188160676532) internal successors, (7193), 4764 states have internal predecessors, (7193), 420 states have call successors, (420), 199 states have call predecessors, (420), 230 states have return successors, (693), 449 states have call predecessors, (693), 418 states have call successors, (693) [2022-07-13 18:13:46,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5381 states to 5381 states and 8306 transitions. [2022-07-13 18:13:46,468 INFO L78 Accepts]: Start accepts. Automaton has 5381 states and 8306 transitions. Word has length 90 [2022-07-13 18:13:46,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:46,468 INFO L495 AbstractCegarLoop]: Abstraction has 5381 states and 8306 transitions. [2022-07-13 18:13:46,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5381 states and 8306 transitions. [2022-07-13 18:13:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:46,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:46,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:46,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:13:46,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1562887606, now seen corresponding path program 1 times [2022-07-13 18:13:46,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:46,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379895916] [2022-07-13 18:13:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:46,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:46,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:46,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:46,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:46,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:46,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379895916] [2022-07-13 18:13:46,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379895916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:46,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:46,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:46,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540036695] [2022-07-13 18:13:46,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:46,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:46,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:46,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:46,538 INFO L87 Difference]: Start difference. First operand 5381 states and 8306 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:48,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:48,127 INFO L93 Difference]: Finished difference Result 20350 states and 31628 transitions. [2022-07-13 18:13:48,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:13:48,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:48,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:48,191 INFO L225 Difference]: With dead ends: 20350 [2022-07-13 18:13:48,191 INFO L226 Difference]: Without dead ends: 14981 [2022-07-13 18:13:48,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:13:48,211 INFO L413 NwaCegarLoop]: 488 mSDtfsCounter, 660 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:48,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 1408 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 18:13:48,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14981 states. [2022-07-13 18:13:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14981 to 10200. [2022-07-13 18:13:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10200 states, 8957 states have (on average 1.5128949425030702) internal successors, (13551), 9023 states have internal predecessors, (13551), 788 states have call successors, (788), 391 states have call predecessors, (788), 454 states have return successors, (1579), 849 states have call predecessors, (1579), 786 states have call successors, (1579) [2022-07-13 18:13:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10200 states to 10200 states and 15918 transitions. [2022-07-13 18:13:48,837 INFO L78 Accepts]: Start accepts. Automaton has 10200 states and 15918 transitions. Word has length 90 [2022-07-13 18:13:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:48,838 INFO L495 AbstractCegarLoop]: Abstraction has 10200 states and 15918 transitions. [2022-07-13 18:13:48,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10200 states and 15918 transitions. [2022-07-13 18:13:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:48,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:48,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:48,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:13:48,848 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash -823621900, now seen corresponding path program 1 times [2022-07-13 18:13:48,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:48,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5783671] [2022-07-13 18:13:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:48,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:48,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:48,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:48,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5783671] [2022-07-13 18:13:48,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5783671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:48,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:48,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:48,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202418349] [2022-07-13 18:13:48,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:48,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:48,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:48,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:48,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:48,939 INFO L87 Difference]: Start difference. First operand 10200 states and 15918 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:50,960 INFO L93 Difference]: Finished difference Result 37168 states and 58490 transitions. [2022-07-13 18:13:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:13:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:51,062 INFO L225 Difference]: With dead ends: 37168 [2022-07-13 18:13:51,062 INFO L226 Difference]: Without dead ends: 26980 [2022-07-13 18:13:51,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:13:51,144 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 680 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:51,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 1344 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 18:13:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26980 states. [2022-07-13 18:13:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26980 to 20188. [2022-07-13 18:13:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20188 states, 17793 states have (on average 1.5173944809756645) internal successors, (26999), 17923 states have internal predecessors, (26999), 1492 states have call successors, (1492), 775 states have call predecessors, (1492), 902 states have return successors, (3805), 1617 states have call predecessors, (3805), 1490 states have call successors, (3805) [2022-07-13 18:13:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20188 states to 20188 states and 32296 transitions. [2022-07-13 18:13:52,137 INFO L78 Accepts]: Start accepts. Automaton has 20188 states and 32296 transitions. Word has length 90 [2022-07-13 18:13:52,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:52,138 INFO L495 AbstractCegarLoop]: Abstraction has 20188 states and 32296 transitions. [2022-07-13 18:13:52,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 20188 states and 32296 transitions. [2022-07-13 18:13:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:52,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:52,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:13:52,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash 130318258, now seen corresponding path program 1 times [2022-07-13 18:13:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:52,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260707502] [2022-07-13 18:13:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:52,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:52,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:52,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:52,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:52,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:52,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:52,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:52,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260707502] [2022-07-13 18:13:52,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260707502] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:52,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:52,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:13:52,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857651714] [2022-07-13 18:13:52,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:13:52,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:52,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:13:52,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:13:52,266 INFO L87 Difference]: Start difference. First operand 20188 states and 32296 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:13:56,298 INFO L93 Difference]: Finished difference Result 71542 states and 115470 transitions. [2022-07-13 18:13:56,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 18:13:56,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:13:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:13:56,548 INFO L225 Difference]: With dead ends: 71542 [2022-07-13 18:13:56,548 INFO L226 Difference]: Without dead ends: 51366 [2022-07-13 18:13:56,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 18:13:56,624 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 625 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:13:56,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 1352 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-13 18:13:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51366 states. [2022-07-13 18:13:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51366 to 40097. [2022-07-13 18:13:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40097 states, 35462 states have (on average 1.5214313913484856) internal successors, (53953), 35720 states have internal predecessors, (53953), 2836 states have call successors, (2836), 1543 states have call predecessors, (2836), 1798 states have return successors, (9651), 3089 states have call predecessors, (9651), 2834 states have call successors, (9651) [2022-07-13 18:13:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40097 states to 40097 states and 66440 transitions. [2022-07-13 18:13:59,103 INFO L78 Accepts]: Start accepts. Automaton has 40097 states and 66440 transitions. Word has length 90 [2022-07-13 18:13:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:13:59,104 INFO L495 AbstractCegarLoop]: Abstraction has 40097 states and 66440 transitions. [2022-07-13 18:13:59,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:13:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 40097 states and 66440 transitions. [2022-07-13 18:13:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:13:59,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:13:59,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:13:59,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:13:59,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:13:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:13:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1085835468, now seen corresponding path program 1 times [2022-07-13 18:13:59,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:13:59,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816370778] [2022-07-13 18:13:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:13:59,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:13:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:59,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:13:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:59,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:13:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:59,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:13:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:59,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:13:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:59,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:13:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:13:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:13:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:13:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816370778] [2022-07-13 18:13:59,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816370778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:13:59,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:13:59,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:13:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873137445] [2022-07-13 18:13:59,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:13:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:13:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:13:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:13:59,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:13:59,203 INFO L87 Difference]: Start difference. First operand 40097 states and 66440 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:14:03,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:14:03,432 INFO L93 Difference]: Finished difference Result 113501 states and 185325 transitions. [2022-07-13 18:14:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:14:03,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 90 [2022-07-13 18:14:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:14:03,716 INFO L225 Difference]: With dead ends: 113501 [2022-07-13 18:14:03,716 INFO L226 Difference]: Without dead ends: 73417 [2022-07-13 18:14:03,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-13 18:14:03,818 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 831 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 18:14:03,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 1094 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 18:14:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73417 states. [2022-07-13 18:14:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73417 to 59620. [2022-07-13 18:14:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59620 states, 52597 states have (on average 1.506892028062437) internal successors, (79258), 53112 states have internal predecessors, (79258), 4322 states have call successors, (4322), 2317 states have call predecessors, (4322), 2700 states have return successors, (13325), 4446 states have call predecessors, (13325), 4320 states have call successors, (13325) [2022-07-13 18:14:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59620 states to 59620 states and 96905 transitions. [2022-07-13 18:14:06,799 INFO L78 Accepts]: Start accepts. Automaton has 59620 states and 96905 transitions. Word has length 90 [2022-07-13 18:14:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:14:06,799 INFO L495 AbstractCegarLoop]: Abstraction has 59620 states and 96905 transitions. [2022-07-13 18:14:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 18:14:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 59620 states and 96905 transitions. [2022-07-13 18:14:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-13 18:14:06,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:14:06,912 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 18:14:06,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:14:06,913 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:14:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:14:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1103843070, now seen corresponding path program 1 times [2022-07-13 18:14:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:14:06,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237764941] [2022-07-13 18:14:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:14:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:14:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:14:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:06,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:14:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:06,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:14:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:06,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:14:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:07,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:14:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:07,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-13 18:14:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:07,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 18:14:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:07,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 18:14:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:14:07,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:14:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237764941] [2022-07-13 18:14:07,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237764941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:14:07,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003115479] [2022-07-13 18:14:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:14:07,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:14:07,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:14:07,020 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) [2022-07-13 18:14:07,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:14:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 18:14:07,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:14:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 18:14:07,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:14:07,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003115479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:14:07,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:14:07,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 18:14:07,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076584977] [2022-07-13 18:14:07,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:14:07,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:14:07,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:14:07,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:14:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:14:07,234 INFO L87 Difference]: Start difference. First operand 59620 states and 96905 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 18:14:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:14:12,592 INFO L93 Difference]: Finished difference Result 177479 states and 290291 transitions. [2022-07-13 18:14:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:14:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-07-13 18:14:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:14:13,155 INFO L225 Difference]: With dead ends: 177479 [2022-07-13 18:14:13,155 INFO L226 Difference]: Without dead ends: 117872 [2022-07-13 18:14:13,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:14:13,316 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 222 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:14:13,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:14:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117872 states. [2022-07-13 18:14:19,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117872 to 117096. [2022-07-13 18:14:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117096 states, 103251 states have (on average 1.5051767053103602) internal successors, (155411), 104279 states have internal predecessors, (155411), 8444 states have call successors, (8444), 4633 states have call predecessors, (8444), 5400 states have return successors, (26197), 8439 states have call predecessors, (26197), 8442 states have call successors, (26197) [2022-07-13 18:14:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117096 states to 117096 states and 190052 transitions. [2022-07-13 18:14:21,328 INFO L78 Accepts]: Start accepts. Automaton has 117096 states and 190052 transitions. Word has length 146 [2022-07-13 18:14:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:14:21,329 INFO L495 AbstractCegarLoop]: Abstraction has 117096 states and 190052 transitions. [2022-07-13 18:14:21,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 18:14:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 117096 states and 190052 transitions. [2022-07-13 18:14:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-13 18:14:21,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:14:21,784 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-13 18:14:21,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:14:22,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 18:14:22,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:14:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:14:22,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1226046174, now seen corresponding path program 1 times [2022-07-13 18:14:22,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:14:22,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897318208] [2022-07-13 18:14:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:14:22,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:14:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:14:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 18:14:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 18:14:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 18:14:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-13 18:14:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-07-13 18:14:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 18:14:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-13 18:14:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:14:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:14:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897318208] [2022-07-13 18:14:22,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897318208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:14:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168104637] [2022-07-13 18:14:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:14:22,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:14:22,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:14:22,231 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) [2022-07-13 18:14:22,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:14:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:14:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 18:14:22,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:14:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 18:14:22,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 18:14:22,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168104637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:14:22,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 18:14:22,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 18:14:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125662125] [2022-07-13 18:14:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:14:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:14:22,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:14:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:14:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:14:22,496 INFO L87 Difference]: Start difference. First operand 117096 states and 190052 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 18:14:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:14:34,517 INFO L93 Difference]: Finished difference Result 348553 states and 569410 transitions. [2022-07-13 18:14:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:14:34,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 146 [2022-07-13 18:14:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:14:36,036 INFO L225 Difference]: With dead ends: 348553 [2022-07-13 18:14:36,037 INFO L226 Difference]: Without dead ends: 231470 [2022-07-13 18:14:36,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:14:36,381 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 228 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:14:36,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 536 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:14:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231470 states.