./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.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/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.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 fe6bee847a7b573239a2f60b60a87297f25c539812daa07adcb7591b7977879b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:08:26,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:08:26,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:08:26,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:08:26,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:08:26,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:08:26,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:08:26,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:08:26,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:08:26,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:08:26,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:08:26,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:08:26,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:08:26,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:08:26,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:08:26,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:08:26,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:08:26,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:08:26,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:08:26,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:08:26,718 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:08:26,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:08:26,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:08:26,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:08:26,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:08:26,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:08:26,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:08:26,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:08:26,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:08:26,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:08:26,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:08:26,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:08:26,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:08:26,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:08:26,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:08:26,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:08:26,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:08:26,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:08:26,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:08:26,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:08:26,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:08:26,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:08:26,733 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:08:26,762 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:08:26,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:08:26,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:08:26,763 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:08:26,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:08:26,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:08:26,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:08:26,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:08:26,764 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:08:26,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:08:26,765 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:08:26,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:08:26,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:08:26,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:08:26,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:08:26,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:08:26,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:08:26,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:08:26,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:08:26,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:08:26,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:08:26,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:08:26,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:08:26,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:08:26,769 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:08:26,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:08:26,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:08:26,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe6bee847a7b573239a2f60b60a87297f25c539812daa07adcb7591b7977879b [2022-07-13 21:08:26,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:08:26,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:08:26,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:08:26,950 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:08:26,950 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:08:26,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2022-07-13 21:08:26,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebe61155/1420c58db5b24d01940cbf4312162479/FLAG861ad6710 [2022-07-13 21:08:27,388 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:08:27,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2022-07-13 21:08:27,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebe61155/1420c58db5b24d01940cbf4312162479/FLAG861ad6710 [2022-07-13 21:08:27,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebe61155/1420c58db5b24d01940cbf4312162479 [2022-07-13 21:08:27,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:08:27,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:08:27,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:08:27,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:08:27,440 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:08:27,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbff9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27, skipping insertion in model container [2022-07-13 21:08:27,442 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:08:27,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:08:27,613 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/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[913,926] [2022-07-13 21:08:27,656 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/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[5977,5990] [2022-07-13 21:08:27,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:08:27,749 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:08:27,759 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/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[913,926] [2022-07-13 21:08:27,766 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/combinations/pc_sfifo_1.cil-2+token_ring.10.cil-1.c[5977,5990] [2022-07-13 21:08:27,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:08:27,808 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:08:27,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27 WrapperNode [2022-07-13 21:08:27,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:08:27,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:08:27,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:08:27,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:08:27,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,866 INFO L137 Inliner]: procedures = 68, calls = 79, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 944 [2022-07-13 21:08:27,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:08:27,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:08:27,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:08:27,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:08:27,873 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:08:27,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:08:27,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:08:27,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:08:27,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (1/1) ... [2022-07-13 21:08:27,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:08:27,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:27,969 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 21:08:27,978 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 21:08:27,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:08:27,998 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 21:08:27,999 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 21:08:27,999 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-07-13 21:08:27,999 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-07-13 21:08:27,999 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-13 21:08:27,999 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-13 21:08:27,999 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-13 21:08:27,999 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-13 21:08:27,999 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-13 21:08:28,000 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-13 21:08:28,000 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-13 21:08:28,000 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-13 21:08:28,000 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-13 21:08:28,000 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-13 21:08:28,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:08:28,000 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-13 21:08:28,001 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-13 21:08:28,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:08:28,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:08:28,001 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-13 21:08:28,001 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-13 21:08:28,001 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-13 21:08:28,001 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-13 21:08:28,090 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:08:28,091 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:08:28,670 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:08:28,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:08:28,689 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2022-07-13 21:08:28,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:08:28 BoogieIcfgContainer [2022-07-13 21:08:28,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:08:28,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:08:28,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:08:28,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:08:28,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:08:27" (1/3) ... [2022-07-13 21:08:28,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c070de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:08:28, skipping insertion in model container [2022-07-13 21:08:28,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:08:27" (2/3) ... [2022-07-13 21:08:28,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c070de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:08:28, skipping insertion in model container [2022-07-13 21:08:28,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:08:28" (3/3) ... [2022-07-13 21:08:28,698 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.10.cil-1.c [2022-07-13 21:08:28,708 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:08:28,708 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:08:28,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:08:28,763 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@39fdf384, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e59aa89 [2022-07-13 21:08:28,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:08:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 412 states, 367 states have (on average 1.6457765667574933) internal successors, (604), 374 states have internal predecessors, (604), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-13 21:08:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 21:08:28,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:28,777 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] [2022-07-13 21:08:28,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1419459075, now seen corresponding path program 1 times [2022-07-13 21:08:28,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51812444] [2022-07-13 21:08:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:28,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 21:08:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:28,962 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 21:08:28,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51812444] [2022-07-13 21:08:28,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51812444] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:28,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:28,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:08:28,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571351984] [2022-07-13 21:08:28,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:28,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:28,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:28,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:28,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:08:28,994 INFO L87 Difference]: Start difference. First operand has 412 states, 367 states have (on average 1.6457765667574933) internal successors, (604), 374 states have internal predecessors, (604), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 21:08:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:29,368 INFO L93 Difference]: Finished difference Result 809 states and 1309 transitions. [2022-07-13 21:08:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:08:29,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-07-13 21:08:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:29,380 INFO L225 Difference]: With dead ends: 809 [2022-07-13 21:08:29,380 INFO L226 Difference]: Without dead ends: 410 [2022-07-13 21:08:29,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:29,385 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 348 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:29,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1215 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 21:08:29,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-07-13 21:08:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 401. [2022-07-13 21:08:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 359 states have (on average 1.551532033426184) internal successors, (557), 363 states have internal predecessors, (557), 32 states have call successors, (32), 10 states have call predecessors, (32), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-13 21:08:29,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 617 transitions. [2022-07-13 21:08:29,453 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 617 transitions. Word has length 44 [2022-07-13 21:08:29,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:29,454 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 617 transitions. [2022-07-13 21:08:29,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 21:08:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 617 transitions. [2022-07-13 21:08:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-13 21:08:29,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:29,461 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] [2022-07-13 21:08:29,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:08:29,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1503700923, now seen corresponding path program 1 times [2022-07-13 21:08:29,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:29,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692170232] [2022-07-13 21:08:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:29,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:29,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 21:08:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:29,562 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 21:08:29,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692170232] [2022-07-13 21:08:29,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692170232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:29,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:29,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:08:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550281235] [2022-07-13 21:08:29,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:29,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:29,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:29,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:08:29,569 INFO L87 Difference]: Start difference. First operand 401 states and 617 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:08:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:29,719 INFO L93 Difference]: Finished difference Result 531 states and 800 transitions. [2022-07-13 21:08:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:08:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-07-13 21:08:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:29,724 INFO L225 Difference]: With dead ends: 531 [2022-07-13 21:08:29,724 INFO L226 Difference]: Without dead ends: 469 [2022-07-13 21:08:29,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:29,727 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 829 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:29,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 999 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:08:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-13 21:08:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 463. [2022-07-13 21:08:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 414 states have (on average 1.5241545893719808) internal successors, (631), 419 states have internal predecessors, (631), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-07-13 21:08:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 705 transitions. [2022-07-13 21:08:29,758 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 705 transitions. Word has length 44 [2022-07-13 21:08:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:29,758 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 705 transitions. [2022-07-13 21:08:29,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:08:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 705 transitions. [2022-07-13 21:08:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:08:29,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:29,760 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] [2022-07-13 21:08:29,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:08:29,760 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:29,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:29,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1980433208, now seen corresponding path program 1 times [2022-07-13 21:08:29,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:29,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973643760] [2022-07-13 21:08:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:29,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:29,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:08:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:29,797 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 21:08:29,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:29,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973643760] [2022-07-13 21:08:29,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973643760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:29,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:29,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:08:29,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486811389] [2022-07-13 21:08:29,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:29,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:29,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:29,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:29,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:08:29,799 INFO L87 Difference]: Start difference. First operand 463 states and 705 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:08:29,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:29,937 INFO L93 Difference]: Finished difference Result 723 states and 1075 transitions. [2022-07-13 21:08:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:08:29,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-13 21:08:29,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:29,941 INFO L225 Difference]: With dead ends: 723 [2022-07-13 21:08:29,941 INFO L226 Difference]: Without dead ends: 599 [2022-07-13 21:08:29,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:29,943 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 846 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:29,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [870 Valid, 1006 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:08:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-07-13 21:08:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 574. [2022-07-13 21:08:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 512 states have (on average 1.484375) internal successors, (760), 518 states have internal predecessors, (760), 44 states have call successors, (44), 16 states have call predecessors, (44), 16 states have return successors, (52), 40 states have call predecessors, (52), 40 states have call successors, (52) [2022-07-13 21:08:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 856 transitions. [2022-07-13 21:08:29,963 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 856 transitions. Word has length 45 [2022-07-13 21:08:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:29,964 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 856 transitions. [2022-07-13 21:08:29,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:08:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 856 transitions. [2022-07-13 21:08:29,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 21:08:29,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:29,967 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] [2022-07-13 21:08:29,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:08:29,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1030176627, now seen corresponding path program 1 times [2022-07-13 21:08:29,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:29,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964555676] [2022-07-13 21:08:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:29,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 21:08:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,016 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 21:08:30,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964555676] [2022-07-13 21:08:30,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964555676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:30,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:30,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:08:30,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171876043] [2022-07-13 21:08:30,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:30,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:30,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:30,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:30,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:08:30,017 INFO L87 Difference]: Start difference. First operand 574 states and 856 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:08:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:30,297 INFO L93 Difference]: Finished difference Result 1023 states and 1456 transitions. [2022-07-13 21:08:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:08:30,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-07-13 21:08:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:30,301 INFO L225 Difference]: With dead ends: 1023 [2022-07-13 21:08:30,301 INFO L226 Difference]: Without dead ends: 788 [2022-07-13 21:08:30,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:30,308 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 325 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:30,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1320 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 21:08:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-07-13 21:08:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 672. [2022-07-13 21:08:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 601 states have (on average 1.4608985024958403) internal successors, (878), 609 states have internal predecessors, (878), 48 states have call successors, (48), 21 states have call predecessors, (48), 21 states have return successors, (54), 42 states have call predecessors, (54), 44 states have call successors, (54) [2022-07-13 21:08:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 980 transitions. [2022-07-13 21:08:30,340 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 980 transitions. Word has length 45 [2022-07-13 21:08:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:30,340 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 980 transitions. [2022-07-13 21:08:30,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 21:08:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 980 transitions. [2022-07-13 21:08:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 21:08:30,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:30,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:08:30,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1097869046, now seen corresponding path program 1 times [2022-07-13 21:08:30,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:30,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494554905] [2022-07-13 21:08:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:30,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 21:08:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:08:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:08:30,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:30,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494554905] [2022-07-13 21:08:30,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494554905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:30,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:30,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:08:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564220319] [2022-07-13 21:08:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:30,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:30,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:30,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:08:30,441 INFO L87 Difference]: Start difference. First operand 672 states and 980 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:08:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:30,757 INFO L93 Difference]: Finished difference Result 1211 states and 1699 transitions. [2022-07-13 21:08:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:08:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-07-13 21:08:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:30,763 INFO L225 Difference]: With dead ends: 1211 [2022-07-13 21:08:30,763 INFO L226 Difference]: Without dead ends: 878 [2022-07-13 21:08:30,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:30,765 INFO L413 NwaCegarLoop]: 687 mSDtfsCounter, 313 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:30,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 1373 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 21:08:30,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-07-13 21:08:30,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 840. [2022-07-13 21:08:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 748 states have (on average 1.410427807486631) internal successors, (1055), 758 states have internal predecessors, (1055), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (74), 54 states have call predecessors, (74), 56 states have call successors, (74) [2022-07-13 21:08:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1189 transitions. [2022-07-13 21:08:30,796 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1189 transitions. Word has length 62 [2022-07-13 21:08:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:30,797 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 1189 transitions. [2022-07-13 21:08:30,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:08:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1189 transitions. [2022-07-13 21:08:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 21:08:30,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:30,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:08:30,800 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1559344464, now seen corresponding path program 1 times [2022-07-13 21:08:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366381362] [2022-07-13 21:08:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 21:08:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-13 21:08:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 21:08:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366381362] [2022-07-13 21:08:30,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366381362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:30,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 21:08:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006305406] [2022-07-13 21:08:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:30,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 21:08:30,851 INFO L87 Difference]: Start difference. First operand 840 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:08:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:30,982 INFO L93 Difference]: Finished difference Result 1469 states and 2011 transitions. [2022-07-13 21:08:30,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 21:08:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-07-13 21:08:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:30,987 INFO L225 Difference]: With dead ends: 1469 [2022-07-13 21:08:30,987 INFO L226 Difference]: Without dead ends: 1015 [2022-07-13 21:08:30,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:30,989 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 825 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:30,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 1019 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:08:30,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-07-13 21:08:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 960. [2022-07-13 21:08:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 855 states have (on average 1.3812865497076023) internal successors, (1181), 867 states have internal predecessors, (1181), 66 states have call successors, (66), 33 states have call predecessors, (66), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-07-13 21:08:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1331 transitions. [2022-07-13 21:08:31,037 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1331 transitions. Word has length 67 [2022-07-13 21:08:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:31,039 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1331 transitions. [2022-07-13 21:08:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 21:08:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1331 transitions. [2022-07-13 21:08:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-13 21:08:31,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:31,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:31,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:08:31,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1116930715, now seen corresponding path program 1 times [2022-07-13 21:08:31,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:31,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460516790] [2022-07-13 21:08:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:31,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:08:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:08:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:08:31,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:31,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460516790] [2022-07-13 21:08:31,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460516790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:31,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775871881] [2022-07-13 21:08:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:31,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:31,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:31,139 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 21:08:31,140 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 21:08:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 21:08:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:08:31,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:08:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:08:31,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775871881] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:31,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 21:08:31,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-07-13 21:08:31,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461528323] [2022-07-13 21:08:31,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:31,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 21:08:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 21:08:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:08:31,362 INFO L87 Difference]: Start difference. First operand 960 states and 1331 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:08:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:31,462 INFO L93 Difference]: Finished difference Result 1016 states and 1399 transitions. [2022-07-13 21:08:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 21:08:31,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-07-13 21:08:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:31,466 INFO L225 Difference]: With dead ends: 1016 [2022-07-13 21:08:31,467 INFO L226 Difference]: Without dead ends: 1013 [2022-07-13 21:08:31,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:08:31,473 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 1116 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:31,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 712 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 21:08:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-07-13 21:08:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 959. [2022-07-13 21:08:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 855 states have (on average 1.3789473684210527) internal successors, (1179), 866 states have internal predecessors, (1179), 65 states have call successors, (65), 33 states have call predecessors, (65), 37 states have return successors, (84), 60 states have call predecessors, (84), 62 states have call successors, (84) [2022-07-13 21:08:31,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1328 transitions. [2022-07-13 21:08:31,501 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1328 transitions. Word has length 68 [2022-07-13 21:08:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:31,501 INFO L495 AbstractCegarLoop]: Abstraction has 959 states and 1328 transitions. [2022-07-13 21:08:31,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 21:08:31,501 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1328 transitions. [2022-07-13 21:08:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 21:08:31,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:31,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:31,538 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 21:08:31,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:31,719 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash 263839635, now seen corresponding path program 1 times [2022-07-13 21:08:31,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16817138] [2022-07-13 21:08:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:08:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 21:08:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 21:08:31,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16817138] [2022-07-13 21:08:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16817138] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739159900] [2022-07-13 21:08:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:31,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:31,770 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 21:08:31,771 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 21:08:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:08:31,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:08:32,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:08:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:08:32,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739159900] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:08:32,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:08:32,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-07-13 21:08:32,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258446435] [2022-07-13 21:08:32,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:08:32,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 21:08:32,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 21:08:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:08:32,114 INFO L87 Difference]: Start difference. First operand 959 states and 1328 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 21:08:33,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:33,350 INFO L93 Difference]: Finished difference Result 2659 states and 3548 transitions. [2022-07-13 21:08:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 21:08:33,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-07-13 21:08:33,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:33,357 INFO L225 Difference]: With dead ends: 2659 [2022-07-13 21:08:33,357 INFO L226 Difference]: Without dead ends: 2115 [2022-07-13 21:08:33,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 21:08:33,359 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 1182 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 3912 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:33,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 3912 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:08:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2022-07-13 21:08:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1348. [2022-07-13 21:08:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1205 states have (on average 1.3385892116182572) internal successors, (1613), 1224 states have internal predecessors, (1613), 85 states have call successors, (85), 47 states have call predecessors, (85), 56 states have return successors, (118), 77 states have call predecessors, (118), 82 states have call successors, (118) [2022-07-13 21:08:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1816 transitions. [2022-07-13 21:08:33,420 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1816 transitions. Word has length 69 [2022-07-13 21:08:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:33,421 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1816 transitions. [2022-07-13 21:08:33,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 21:08:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1816 transitions. [2022-07-13 21:08:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-13 21:08:33,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:33,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:33,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:08:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-13 21:08:33,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1486258056, now seen corresponding path program 1 times [2022-07-13 21:08:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342701569] [2022-07-13 21:08:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:33,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:33,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:33,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:08:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:33,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-13 21:08:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:33,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-07-13 21:08:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 21:08:33,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342701569] [2022-07-13 21:08:33,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342701569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758429288] [2022-07-13 21:08:33,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:33,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:33,697 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:08:33,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 21:08:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:33,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 21:08:33,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 21:08:33,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:08:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758429288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:33,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:08:33,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:08:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658781736] [2022-07-13 21:08:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:33,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:08:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:08:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:33,803 INFO L87 Difference]: Start difference. First operand 1348 states and 1816 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 21:08:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:33,842 INFO L93 Difference]: Finished difference Result 2071 states and 2754 transitions. [2022-07-13 21:08:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:08:33,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-07-13 21:08:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:33,847 INFO L225 Difference]: With dead ends: 2071 [2022-07-13 21:08:33,847 INFO L226 Difference]: Without dead ends: 1226 [2022-07-13 21:08:33,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:33,849 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 578 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:33,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 717 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:08:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-07-13 21:08:33,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1211. [2022-07-13 21:08:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1084 states have (on average 1.3422509225092252) internal successors, (1455), 1102 states have internal predecessors, (1455), 77 states have call successors, (77), 41 states have call predecessors, (77), 48 states have return successors, (104), 68 states have call predecessors, (104), 74 states have call successors, (104) [2022-07-13 21:08:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1636 transitions. [2022-07-13 21:08:33,896 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1636 transitions. Word has length 88 [2022-07-13 21:08:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:33,896 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1636 transitions. [2022-07-13 21:08:33,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-13 21:08:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1636 transitions. [2022-07-13 21:08:33,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 21:08:33,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:33,899 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:08:33,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 21:08:34,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:34,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash 125293381, now seen corresponding path program 1 times [2022-07-13 21:08:34,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:34,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881778830] [2022-07-13 21:08:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:08:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 21:08:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-13 21:08:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:08:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 21:08:34,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881778830] [2022-07-13 21:08:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881778830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:08:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195226036] [2022-07-13 21:08:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:34,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:34,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:08:34,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:08:34,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 21:08:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 21:08:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:08:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 21:08:34,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:08:34,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195226036] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:34,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:08:34,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 21:08:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603555731] [2022-07-13 21:08:34,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:34,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 21:08:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:34,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 21:08:34,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:34,278 INFO L87 Difference]: Start difference. First operand 1211 states and 1636 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 21:08:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:34,306 INFO L93 Difference]: Finished difference Result 1480 states and 1977 transitions. [2022-07-13 21:08:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 21:08:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-07-13 21:08:34,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:34,308 INFO L225 Difference]: With dead ends: 1480 [2022-07-13 21:08:34,308 INFO L226 Difference]: Without dead ends: 335 [2022-07-13 21:08:34,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:34,310 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 59 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:34,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1252 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:08:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-13 21:08:34,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-07-13 21:08:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.576158940397351) internal successors, (476), 304 states have internal predecessors, (476), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-13 21:08:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 526 transitions. [2022-07-13 21:08:34,319 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 526 transitions. Word has length 103 [2022-07-13 21:08:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:34,319 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 526 transitions. [2022-07-13 21:08:34,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 21:08:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 526 transitions. [2022-07-13 21:08:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:34,320 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:34,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:34,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 21:08:34,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:08:34,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:34,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:34,538 INFO L85 PathProgramCache]: Analyzing trace with hash 638824151, now seen corresponding path program 1 times [2022-07-13 21:08:34,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:34,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416255751] [2022-07-13 21:08:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:34,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:34,617 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 21:08:34,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:34,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416255751] [2022-07-13 21:08:34,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416255751] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:34,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:34,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:08:34,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168561570] [2022-07-13 21:08:34,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:34,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:08:34,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:34,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:08:34,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:34,630 INFO L87 Difference]: Start difference. First operand 335 states and 526 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:35,467 INFO L93 Difference]: Finished difference Result 782 states and 1248 transitions. [2022-07-13 21:08:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:08:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:35,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:35,469 INFO L225 Difference]: With dead ends: 782 [2022-07-13 21:08:35,470 INFO L226 Difference]: Without dead ends: 455 [2022-07-13 21:08:35,471 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 21:08:35,471 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 893 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:35,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 935 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:08:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-13 21:08:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 335. [2022-07-13 21:08:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.5728476821192052) internal successors, (475), 304 states have internal predecessors, (475), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-13 21:08:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 525 transitions. [2022-07-13 21:08:35,487 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 525 transitions. Word has length 157 [2022-07-13 21:08:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:35,487 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 525 transitions. [2022-07-13 21:08:35,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 525 transitions. [2022-07-13 21:08:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:35,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:35,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:35,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:08:35,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:35,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:35,490 INFO L85 PathProgramCache]: Analyzing trace with hash 903471641, now seen corresponding path program 1 times [2022-07-13 21:08:35,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:35,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677776093] [2022-07-13 21:08:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:35,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:35,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:35,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:35,569 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 21:08:35,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:35,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677776093] [2022-07-13 21:08:35,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677776093] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:35,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:35,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:08:35,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869846296] [2022-07-13 21:08:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:35,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:08:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:35,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:08:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:08:35,570 INFO L87 Difference]: Start difference. First operand 335 states and 525 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:36,396 INFO L93 Difference]: Finished difference Result 774 states and 1231 transitions. [2022-07-13 21:08:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 21:08:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:36,398 INFO L225 Difference]: With dead ends: 774 [2022-07-13 21:08:36,398 INFO L226 Difference]: Without dead ends: 455 [2022-07-13 21:08:36,399 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 21:08:36,400 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 884 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:36,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 933 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:08:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-13 21:08:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 335. [2022-07-13 21:08:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 302 states have (on average 1.5695364238410596) internal successors, (474), 304 states have internal predecessors, (474), 26 states have call successors, (26), 7 states have call predecessors, (26), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-13 21:08:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 524 transitions. [2022-07-13 21:08:36,415 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 524 transitions. Word has length 157 [2022-07-13 21:08:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:36,415 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 524 transitions. [2022-07-13 21:08:36,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 524 transitions. [2022-07-13 21:08:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:36,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:36,416 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:36,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:08:36,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash 492861275, now seen corresponding path program 1 times [2022-07-13 21:08:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:36,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904838813] [2022-07-13 21:08:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:36,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:36,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:36,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:36,510 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 21:08:36,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:36,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904838813] [2022-07-13 21:08:36,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904838813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:36,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:36,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:08:36,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822204534] [2022-07-13 21:08:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:08:36,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:08:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:08:36,513 INFO L87 Difference]: Start difference. First operand 335 states and 524 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:38,288 INFO L93 Difference]: Finished difference Result 1221 states and 1955 transitions. [2022-07-13 21:08:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:08:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:38,293 INFO L225 Difference]: With dead ends: 1221 [2022-07-13 21:08:38,293 INFO L226 Difference]: Without dead ends: 905 [2022-07-13 21:08:38,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:08:38,294 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 1338 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1355 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:38,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1355 Valid, 1477 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-13 21:08:38,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-07-13 21:08:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 664. [2022-07-13 21:08:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 605 states have (on average 1.5834710743801652) internal successors, (958), 608 states have internal predecessors, (958), 45 states have call successors, (45), 13 states have call predecessors, (45), 13 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2022-07-13 21:08:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1049 transitions. [2022-07-13 21:08:38,348 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1049 transitions. Word has length 157 [2022-07-13 21:08:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:38,349 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 1049 transitions. [2022-07-13 21:08:38,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1049 transitions. [2022-07-13 21:08:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:38,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:38,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:38,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:08:38,350 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:38,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1158896471, now seen corresponding path program 1 times [2022-07-13 21:08:38,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:38,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307171041] [2022-07-13 21:08:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:38,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:38,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:38,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:38,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:38,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:38,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:38,443 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 21:08:38,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:38,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307171041] [2022-07-13 21:08:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307171041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:38,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107972462] [2022-07-13 21:08:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:38,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:38,445 INFO L87 Difference]: Start difference. First operand 664 states and 1049 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:40,759 INFO L93 Difference]: Finished difference Result 2014 states and 3231 transitions. [2022-07-13 21:08:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:08:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:40,763 INFO L225 Difference]: With dead ends: 2014 [2022-07-13 21:08:40,763 INFO L226 Difference]: Without dead ends: 1369 [2022-07-13 21:08:40,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:08:40,765 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 1363 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1380 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:40,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1380 Valid, 2585 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2680 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 21:08:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-07-13 21:08:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 970. [2022-07-13 21:08:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 885 states have (on average 1.577401129943503) internal successors, (1396), 889 states have internal predecessors, (1396), 64 states have call successors, (64), 19 states have call predecessors, (64), 20 states have return successors, (67), 63 states have call predecessors, (67), 62 states have call successors, (67) [2022-07-13 21:08:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1527 transitions. [2022-07-13 21:08:40,825 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1527 transitions. Word has length 157 [2022-07-13 21:08:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:40,825 INFO L495 AbstractCegarLoop]: Abstraction has 970 states and 1527 transitions. [2022-07-13 21:08:40,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1527 transitions. [2022-07-13 21:08:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:40,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:40,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:40,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 21:08:40,827 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117223, now seen corresponding path program 1 times [2022-07-13 21:08:40,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:40,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157274834] [2022-07-13 21:08:40,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:40,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:40,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:40,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:40,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:40,931 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 21:08:40,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157274834] [2022-07-13 21:08:40,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157274834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:40,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:40,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:40,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960545048] [2022-07-13 21:08:40,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:40,933 INFO L87 Difference]: Start difference. First operand 970 states and 1527 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:43,097 INFO L93 Difference]: Finished difference Result 3182 states and 5097 transitions. [2022-07-13 21:08:43,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:08:43,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:43,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:43,108 INFO L225 Difference]: With dead ends: 3182 [2022-07-13 21:08:43,108 INFO L226 Difference]: Without dead ends: 2231 [2022-07-13 21:08:43,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:08:43,111 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 1356 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 2575 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:43,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 2575 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 21:08:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-07-13 21:08:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1586. [2022-07-13 21:08:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1449 states have (on average 1.572808833678399) internal successors, (2279), 1455 states have internal predecessors, (2279), 102 states have call successors, (102), 31 states have call predecessors, (102), 34 states have return successors, (113), 103 states have call predecessors, (113), 100 states have call successors, (113) [2022-07-13 21:08:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2494 transitions. [2022-07-13 21:08:43,205 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2494 transitions. Word has length 157 [2022-07-13 21:08:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:43,205 INFO L495 AbstractCegarLoop]: Abstraction has 1586 states and 2494 transitions. [2022-07-13 21:08:43,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2494 transitions. [2022-07-13 21:08:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:43,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:43,207 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:43,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:08:43,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:43,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1373650725, now seen corresponding path program 1 times [2022-07-13 21:08:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:43,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697983944] [2022-07-13 21:08:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:43,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:43,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:43,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:43,310 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 21:08:43,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:43,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697983944] [2022-07-13 21:08:43,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697983944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:43,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:43,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:43,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719924456] [2022-07-13 21:08:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:43,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:43,312 INFO L87 Difference]: Start difference. First operand 1586 states and 2494 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:45,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:45,616 INFO L93 Difference]: Finished difference Result 5436 states and 8676 transitions. [2022-07-13 21:08:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:08:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:45,626 INFO L225 Difference]: With dead ends: 5436 [2022-07-13 21:08:45,627 INFO L226 Difference]: Without dead ends: 3869 [2022-07-13 21:08:45,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:08:45,631 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 1355 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 2570 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:45,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1372 Valid, 2570 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 21:08:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2022-07-13 21:08:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 2819. [2022-07-13 21:08:45,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.569045771916214) internal successors, (4045), 2588 states have internal predecessors, (4045), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-07-13 21:08:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4434 transitions. [2022-07-13 21:08:45,779 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4434 transitions. Word has length 157 [2022-07-13 21:08:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:45,780 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 4434 transitions. [2022-07-13 21:08:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:45,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4434 transitions. [2022-07-13 21:08:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:45,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:45,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:45,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:08:45,790 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1084831335, now seen corresponding path program 1 times [2022-07-13 21:08:45,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:45,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150041950] [2022-07-13 21:08:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:45,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:45,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:45,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:45,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:45,910 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 21:08:45,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:45,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150041950] [2022-07-13 21:08:45,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150041950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:45,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:45,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:45,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061555107] [2022-07-13 21:08:45,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:45,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:45,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:45,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:45,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:45,912 INFO L87 Difference]: Start difference. First operand 2819 states and 4434 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:47,159 INFO L93 Difference]: Finished difference Result 6690 states and 10683 transitions. [2022-07-13 21:08:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:08:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:47,171 INFO L225 Difference]: With dead ends: 6690 [2022-07-13 21:08:47,172 INFO L226 Difference]: Without dead ends: 3890 [2022-07-13 21:08:47,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:08:47,177 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 970 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:47,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 1394 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:08:47,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2022-07-13 21:08:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 2819. [2022-07-13 21:08:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.5655546935609) internal successors, (4036), 2588 states have internal predecessors, (4036), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-07-13 21:08:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4425 transitions. [2022-07-13 21:08:47,342 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4425 transitions. Word has length 157 [2022-07-13 21:08:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:47,342 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 4425 transitions. [2022-07-13 21:08:47,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:47,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4425 transitions. [2022-07-13 21:08:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:47,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:47,345 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:47,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:08:47,345 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1629703909, now seen corresponding path program 1 times [2022-07-13 21:08:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:47,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506041541] [2022-07-13 21:08:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:47,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:47,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:47,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:47,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:47,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:47,452 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 21:08:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:47,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506041541] [2022-07-13 21:08:47,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506041541] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:47,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:47,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:47,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297646000] [2022-07-13 21:08:47,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:47,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:47,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:47,454 INFO L87 Difference]: Start difference. First operand 2819 states and 4425 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:48,584 INFO L93 Difference]: Finished difference Result 6680 states and 10636 transitions. [2022-07-13 21:08:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:08:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:48,601 INFO L225 Difference]: With dead ends: 6680 [2022-07-13 21:08:48,602 INFO L226 Difference]: Without dead ends: 3880 [2022-07-13 21:08:48,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:08:48,607 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 1111 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:48,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1213 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:08:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2022-07-13 21:08:48,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 2819. [2022-07-13 21:08:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.5620636152055858) internal successors, (4027), 2588 states have internal predecessors, (4027), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-07-13 21:08:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4416 transitions. [2022-07-13 21:08:48,820 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4416 transitions. Word has length 157 [2022-07-13 21:08:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:48,820 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 4416 transitions. [2022-07-13 21:08:48,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4416 transitions. [2022-07-13 21:08:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:48,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:48,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:48,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:08:48,824 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:48,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:48,824 INFO L85 PathProgramCache]: Analyzing trace with hash -954543783, now seen corresponding path program 1 times [2022-07-13 21:08:48,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:48,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148276726] [2022-07-13 21:08:48,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:48,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:48,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:48,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:48,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:48,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:48,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:48,920 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 21:08:48,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148276726] [2022-07-13 21:08:48,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148276726] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:48,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:48,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:48,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922621962] [2022-07-13 21:08:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:48,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:48,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:48,922 INFO L87 Difference]: Start difference. First operand 2819 states and 4416 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:50,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:50,006 INFO L93 Difference]: Finished difference Result 6670 states and 10589 transitions. [2022-07-13 21:08:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:08:50,006 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:50,016 INFO L225 Difference]: With dead ends: 6670 [2022-07-13 21:08:50,016 INFO L226 Difference]: Without dead ends: 3870 [2022-07-13 21:08:50,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:08:50,025 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 1109 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:50,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 1209 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1108 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:08:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2022-07-13 21:08:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 2819. [2022-07-13 21:08:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2578 states have (on average 1.5585725368502716) internal successors, (4018), 2588 states have internal predecessors, (4018), 178 states have call successors, (178), 55 states have call predecessors, (178), 62 states have return successors, (211), 183 states have call predecessors, (211), 176 states have call successors, (211) [2022-07-13 21:08:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4407 transitions. [2022-07-13 21:08:50,214 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4407 transitions. Word has length 157 [2022-07-13 21:08:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:50,215 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 4407 transitions. [2022-07-13 21:08:50,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4407 transitions. [2022-07-13 21:08:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:50,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:50,217 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:50,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:08:50,217 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:50,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1902595749, now seen corresponding path program 1 times [2022-07-13 21:08:50,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:50,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975487583] [2022-07-13 21:08:50,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:50,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:50,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:50,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:50,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:50,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:50,325 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 21:08:50,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:50,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975487583] [2022-07-13 21:08:50,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975487583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:50,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:50,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:50,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099427946] [2022-07-13 21:08:50,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:50,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:50,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:50,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:50,328 INFO L87 Difference]: Start difference. First operand 2819 states and 4407 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:52,805 INFO L93 Difference]: Finished difference Result 9913 states and 15658 transitions. [2022-07-13 21:08:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:08:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:52,822 INFO L225 Difference]: With dead ends: 9913 [2022-07-13 21:08:52,822 INFO L226 Difference]: Without dead ends: 7113 [2022-07-13 21:08:52,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:08:52,828 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 1333 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 2601 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1350 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:52,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1350 Valid, 2547 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2601 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 21:08:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-07-13 21:08:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 5319. [2022-07-13 21:08:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 4870 states have (on average 1.5535934291581108) internal successors, (7566), 4888 states have internal predecessors, (7566), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2022-07-13 21:08:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 8321 transitions. [2022-07-13 21:08:53,177 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 8321 transitions. Word has length 157 [2022-07-13 21:08:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:53,178 INFO L495 AbstractCegarLoop]: Abstraction has 5319 states and 8321 transitions. [2022-07-13 21:08:53,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 8321 transitions. [2022-07-13 21:08:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:53,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:53,181 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:53,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:08:53,181 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1807599897, now seen corresponding path program 1 times [2022-07-13 21:08:53,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:53,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448921867] [2022-07-13 21:08:53,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:53,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:53,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:53,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:53,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:53,267 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 21:08:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:53,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448921867] [2022-07-13 21:08:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448921867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:53,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:53,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:53,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534960133] [2022-07-13 21:08:53,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:53,269 INFO L87 Difference]: Start difference. First operand 5319 states and 8321 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:54,684 INFO L93 Difference]: Finished difference Result 12474 states and 19764 transitions. [2022-07-13 21:08:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:08:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:54,700 INFO L225 Difference]: With dead ends: 12474 [2022-07-13 21:08:54,700 INFO L226 Difference]: Without dead ends: 7174 [2022-07-13 21:08:54,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:08:54,710 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 1111 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:54,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1200 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:08:54,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7174 states. [2022-07-13 21:08:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7174 to 5319. [2022-07-13 21:08:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5319 states, 4870 states have (on average 1.5501026694045175) internal successors, (7549), 4888 states have internal predecessors, (7549), 330 states have call successors, (330), 103 states have call predecessors, (330), 118 states have return successors, (425), 343 states have call predecessors, (425), 328 states have call successors, (425) [2022-07-13 21:08:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5319 states to 5319 states and 8304 transitions. [2022-07-13 21:08:55,078 INFO L78 Accepts]: Start accepts. Automaton has 5319 states and 8304 transitions. Word has length 157 [2022-07-13 21:08:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:55,078 INFO L495 AbstractCegarLoop]: Abstraction has 5319 states and 8304 transitions. [2022-07-13 21:08:55,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5319 states and 8304 transitions. [2022-07-13 21:08:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:55,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:55,081 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:55,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:08:55,081 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:55,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1373094299, now seen corresponding path program 1 times [2022-07-13 21:08:55,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:55,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711208068] [2022-07-13 21:08:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:55,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:55,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:55,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:55,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:55,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:55,174 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 21:08:55,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:55,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711208068] [2022-07-13 21:08:55,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711208068] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:55,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:55,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:55,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587408104] [2022-07-13 21:08:55,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:55,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:55,177 INFO L87 Difference]: Start difference. First operand 5319 states and 8304 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:58,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:08:58,875 INFO L93 Difference]: Finished difference Result 21279 states and 33424 transitions. [2022-07-13 21:08:58,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:08:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:08:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:08:58,914 INFO L225 Difference]: With dead ends: 21279 [2022-07-13 21:08:58,914 INFO L226 Difference]: Without dead ends: 15979 [2022-07-13 21:08:58,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:08:58,930 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 1732 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1760 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:08:58,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1760 Valid, 2520 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 21:08:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15979 states. [2022-07-13 21:08:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15979 to 10314. [2022-07-13 21:08:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 9465 states have (on average 1.5487585842577918) internal successors, (14659), 9499 states have internal predecessors, (14659), 618 states have call successors, (618), 199 states have call predecessors, (618), 230 states have return successors, (891), 647 states have call predecessors, (891), 616 states have call successors, (891) [2022-07-13 21:08:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 16168 transitions. [2022-07-13 21:08:59,721 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 16168 transitions. Word has length 157 [2022-07-13 21:08:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:08:59,721 INFO L495 AbstractCegarLoop]: Abstraction has 10314 states and 16168 transitions. [2022-07-13 21:08:59,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:08:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 16168 transitions. [2022-07-13 21:08:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:08:59,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:08:59,726 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:08:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:08:59,726 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:08:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:08:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 666497693, now seen corresponding path program 1 times [2022-07-13 21:08:59,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:08:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254065367] [2022-07-13 21:08:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:08:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:08:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:59,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:08:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:59,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:08:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:08:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:59,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:08:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:59,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:08:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:08:59,809 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 21:08:59,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:08:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254065367] [2022-07-13 21:08:59,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254065367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:08:59,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:08:59,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:08:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853707593] [2022-07-13 21:08:59,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:08:59,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:08:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:08:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:08:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:08:59,811 INFO L87 Difference]: Start difference. First operand 10314 states and 16168 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:09:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:05,578 INFO L93 Difference]: Finished difference Result 41168 states and 64906 transitions. [2022-07-13 21:09:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:09:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:09:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:05,654 INFO L225 Difference]: With dead ends: 41168 [2022-07-13 21:09:05,654 INFO L226 Difference]: Without dead ends: 30873 [2022-07-13 21:09:05,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:09:05,679 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 1415 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 2667 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:05,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 2667 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-13 21:09:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30873 states. [2022-07-13 21:09:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30873 to 19963. [2022-07-13 21:09:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19963 states, 18330 states have (on average 1.5444080741953083) internal successors, (28309), 18396 states have internal predecessors, (28309), 1178 states have call successors, (1178), 391 states have call predecessors, (1178), 454 states have return successors, (1969), 1239 states have call predecessors, (1969), 1176 states have call successors, (1969) [2022-07-13 21:09:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19963 states to 19963 states and 31456 transitions. [2022-07-13 21:09:07,393 INFO L78 Accepts]: Start accepts. Automaton has 19963 states and 31456 transitions. Word has length 157 [2022-07-13 21:09:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:07,393 INFO L495 AbstractCegarLoop]: Abstraction has 19963 states and 31456 transitions. [2022-07-13 21:09:07,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:09:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 19963 states and 31456 transitions. [2022-07-13 21:09:07,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:09:07,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:07,401 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:07,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 21:09:07,401 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:07,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1613535579, now seen corresponding path program 1 times [2022-07-13 21:09:07,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:07,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162043820] [2022-07-13 21:09:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:07,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:07,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:09:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:07,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:09:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:07,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:09:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:07,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:09:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:07,482 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 21:09:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:07,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162043820] [2022-07-13 21:09:07,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162043820] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:07,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:07,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725839203] [2022-07-13 21:09:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:07,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:07,484 INFO L87 Difference]: Start difference. First operand 19963 states and 31456 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:09:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:16,539 INFO L93 Difference]: Finished difference Result 79391 states and 125808 transitions. [2022-07-13 21:09:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:09:16,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:09:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:16,715 INFO L225 Difference]: With dead ends: 79391 [2022-07-13 21:09:16,716 INFO L226 Difference]: Without dead ends: 59447 [2022-07-13 21:09:16,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:09:16,784 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 1652 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 2538 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 2510 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:16,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 2510 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2538 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 21:09:16,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59447 states. [2022-07-13 21:09:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59447 to 39548. [2022-07-13 21:09:20,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39548 states, 36379 states have (on average 1.5452596278072515) internal successors, (56215), 36509 states have internal predecessors, (56215), 2266 states have call successors, (2266), 775 states have call predecessors, (2266), 902 states have return successors, (4579), 2391 states have call predecessors, (4579), 2264 states have call successors, (4579) [2022-07-13 21:09:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39548 states to 39548 states and 63060 transitions. [2022-07-13 21:09:20,571 INFO L78 Accepts]: Start accepts. Automaton has 39548 states and 63060 transitions. Word has length 157 [2022-07-13 21:09:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:20,571 INFO L495 AbstractCegarLoop]: Abstraction has 39548 states and 63060 transitions. [2022-07-13 21:09:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:09:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 39548 states and 63060 transitions. [2022-07-13 21:09:20,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:09:20,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:20,586 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:20,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 21:09:20,588 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1819598115, now seen corresponding path program 1 times [2022-07-13 21:09:20,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345867478] [2022-07-13 21:09:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:20,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:09:20,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:09:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:09:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:09:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:20,677 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 21:09:20,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:20,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345867478] [2022-07-13 21:09:20,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345867478] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:20,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:20,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:20,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131571818] [2022-07-13 21:09:20,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:20,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:20,680 INFO L87 Difference]: Start difference. First operand 39548 states and 63060 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:09:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:09:37,519 INFO L93 Difference]: Finished difference Result 155550 states and 249334 transitions. [2022-07-13 21:09:37,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:09:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:09:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:09:37,897 INFO L225 Difference]: With dead ends: 155550 [2022-07-13 21:09:37,898 INFO L226 Difference]: Without dead ends: 116021 [2022-07-13 21:09:38,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:09:38,008 INFO L413 NwaCegarLoop]: 937 mSDtfsCounter, 1394 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 3006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:09:38,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 2629 Invalid, 3006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-13 21:09:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116021 states. [2022-07-13 21:09:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116021 to 78653. [2022-07-13 21:09:45,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78653 states, 72476 states have (on average 1.546567139466858) internal successors, (112089), 72734 states have internal predecessors, (112089), 4378 states have call successors, (4378), 1543 states have call predecessors, (4378), 1798 states have return successors, (11193), 4631 states have call predecessors, (11193), 4376 states have call successors, (11193) [2022-07-13 21:09:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78653 states to 78653 states and 127660 transitions. [2022-07-13 21:09:45,702 INFO L78 Accepts]: Start accepts. Automaton has 78653 states and 127660 transitions. Word has length 157 [2022-07-13 21:09:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:09:45,702 INFO L495 AbstractCegarLoop]: Abstraction has 78653 states and 127660 transitions. [2022-07-13 21:09:45,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:09:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 78653 states and 127660 transitions. [2022-07-13 21:09:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:09:45,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:09:45,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:45,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 21:09:45,734 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:09:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:09:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash 424960283, now seen corresponding path program 1 times [2022-07-13 21:09:45,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:09:45,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351510490] [2022-07-13 21:09:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:09:45,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:09:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:45,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:09:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:09:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:09:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:45,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:09:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:45,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:09:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:09:45,823 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 21:09:45,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:09:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351510490] [2022-07-13 21:09:45,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351510490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:09:45,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:09:45,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:09:45,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800704600] [2022-07-13 21:09:45,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:09:45,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:09:45,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:09:45,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:09:45,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:09:45,826 INFO L87 Difference]: Start difference. First operand 78653 states and 127660 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:10:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:10:17,811 INFO L93 Difference]: Finished difference Result 305501 states and 498444 transitions. [2022-07-13 21:10:17,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:10:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-07-13 21:10:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:10:18,713 INFO L225 Difference]: With dead ends: 305501 [2022-07-13 21:10:18,714 INFO L226 Difference]: Without dead ends: 226867 [2022-07-13 21:10:18,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:10:18,900 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 1572 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 2612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:10:18,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1600 Valid, 2500 Invalid, 2612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 21:10:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226867 states. [2022-07-13 21:10:33,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226867 to 156734. [2022-07-13 21:10:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156734 states, 144669 states have (on average 1.5481063669479986) internal successors, (223963), 145183 states have internal predecessors, (223963), 8474 states have call successors, (8474), 3079 states have call predecessors, (8474), 3590 states have return successors, (28667), 8983 states have call predecessors, (28667), 8472 states have call successors, (28667) [2022-07-13 21:10:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156734 states to 156734 states and 261104 transitions. [2022-07-13 21:10:34,908 INFO L78 Accepts]: Start accepts. Automaton has 156734 states and 261104 transitions. Word has length 157 [2022-07-13 21:10:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:10:34,908 INFO L495 AbstractCegarLoop]: Abstraction has 156734 states and 261104 transitions. [2022-07-13 21:10:34,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 21:10:34,909 INFO L276 IsEmpty]: Start isEmpty. Operand 156734 states and 261104 transitions. [2022-07-13 21:10:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-07-13 21:10:34,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:10:34,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 21:10:34,959 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:10:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:10:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash 913007389, now seen corresponding path program 1 times [2022-07-13 21:10:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:10:34,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357301254] [2022-07-13 21:10:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:10:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:10:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:34,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:10:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-13 21:10:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:35,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 21:10:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:35,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-13 21:10:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:35,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-07-13 21:10:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:10:35,036 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 21:10:35,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:10:35,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357301254] [2022-07-13 21:10:35,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357301254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:10:35,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:10:35,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:10:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383430997] [2022-07-13 21:10:35,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:10:35,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:10:35,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:10:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:10:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:10:35,037 INFO L87 Difference]: Start difference. First operand 156734 states and 261104 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)