./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:48:54,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:48:54,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:48:54,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:48:54,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:48:54,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:48:54,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:48:54,567 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:48:54,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:48:54,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:48:54,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:48:54,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:48:54,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:48:54,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:48:54,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:48:54,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:48:54,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:48:54,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:48:54,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:48:54,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:48:54,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:48:54,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:48:54,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:48:54,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:48:54,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:48:54,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:48:54,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:48:54,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:48:54,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:48:54,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:48:54,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:48:54,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:48:54,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:48:54,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:48:54,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:48:54,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:48:54,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:48:54,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:48:54,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:48:54,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:48:54,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:48:54,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:48:54,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:48:54,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:48:54,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:48:54,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:48:54,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:48:54,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:48:54,704 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:48:54,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:48:54,705 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:48:54,705 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:48:54,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:48:54,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:48:54,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:48:54,708 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:48:54,708 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:48:54,708 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:48:54,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:48:54,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:48:54,709 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:48:54,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:48:54,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:48:54,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:48:54,710 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:48:54,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:48:54,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:48:54,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:48:54,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:48:54,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:48:54,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:48:54,713 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2021-10-28 09:48:54,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:48:55,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:48:55,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:48:55,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:48:55,026 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:48:55,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-10-28 09:48:55,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/data/3b6058dab/e3f9e954b34141b98dde1824039757aa/FLAGd4a9363be [2021-10-28 09:48:55,772 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:48:55,772 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-10-28 09:48:55,791 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/data/3b6058dab/e3f9e954b34141b98dde1824039757aa/FLAGd4a9363be [2021-10-28 09:48:56,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/data/3b6058dab/e3f9e954b34141b98dde1824039757aa [2021-10-28 09:48:56,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:48:56,056 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:48:56,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:48:56,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:48:56,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:48:56,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22debf8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56, skipping insertion in model container [2021-10-28 09:48:56,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:48:56,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:48:56,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:48:56,508 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:48:56,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:48:56,592 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:48:56,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56 WrapperNode [2021-10-28 09:48:56,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:48:56,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:48:56,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:48:56,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:48:56,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:48:56,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:48:56,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:48:56,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:48:56,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (1/1) ... [2021-10-28 09:48:56,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:48:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:48:56,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:48:56,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:48:56,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:48:56,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:48:56,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:48:56,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:48:56,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:48:56,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:48:56,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:48:56,767 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-10-28 09:48:56,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:48:56,768 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:48:56,768 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:48:56,768 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:48:56,768 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:48:56,769 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:48:56,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:48:56,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:48:56,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:48:56,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:48:56,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:48:56,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:48:56,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:48:56,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:48:56,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:48:56,770 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:48:56,771 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:48:56,771 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:48:56,771 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:48:56,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:48:56,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:48:56,771 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:48:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:48:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:48:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:48:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:48:56,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:48:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:48:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:48:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:48:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:48:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:48:56,773 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:48:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:48:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:48:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:48:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:48:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:48:56,774 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:48:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:48:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:48:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:48:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:48:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:48:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:48:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:48:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:48:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:48:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:48:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:48:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:48:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:48:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:48:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:48:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:48:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:48:56,778 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:48:56,778 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:48:56,778 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:48:56,778 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:48:56,778 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:48:56,778 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:48:56,779 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:48:56,779 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:48:56,779 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:48:56,779 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:48:56,779 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:48:56,780 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:48:56,780 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:48:56,780 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:48:56,780 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:48:56,780 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:48:56,780 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:48:56,781 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:48:56,781 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:48:56,781 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:48:56,781 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:48:56,781 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:48:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:48:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:48:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:48:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:48:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:48:56,782 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:48:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:48:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:48:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:48:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:48:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:48:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:48:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:48:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:48:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:48:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:48:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:48:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:48:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:48:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:48:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:48:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:48:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:48:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:48:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:48:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 09:48:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-10-28 09:48:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:48:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:48:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:48:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:48:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:48:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:48:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:48:57,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:48:57,371 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:48:57,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:48:57 BoogieIcfgContainer [2021-10-28 09:48:57,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:48:57,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:48:57,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:48:57,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:48:57,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:48:56" (1/3) ... [2021-10-28 09:48:57,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d36c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:48:57, skipping insertion in model container [2021-10-28 09:48:57,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:48:56" (2/3) ... [2021-10-28 09:48:57,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d36c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:48:57, skipping insertion in model container [2021-10-28 09:48:57,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:48:57" (3/3) ... [2021-10-28 09:48:57,389 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2021-10-28 09:48:57,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:48:57,394 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-28 09:48:57,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:48:57,453 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:48:57,453 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-28 09:48:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 09:48:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:48:57,493 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:57,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:57,494 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1363313202, now seen corresponding path program 1 times [2021-10-28 09:48:57,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:57,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544991694] [2021-10-28 09:48:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:57,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:57,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:57,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:57,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544991694] [2021-10-28 09:48:57,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544991694] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:57,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:57,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:48:57,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040271679] [2021-10-28 09:48:57,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:48:57,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:48:57,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:48:57,967 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:58,219 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-10-28 09:48:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:48:58,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:48:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:58,232 INFO L225 Difference]: With dead ends: 83 [2021-10-28 09:48:58,232 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 09:48:58,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:48:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 09:48:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-10-28 09:48:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 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) [2021-10-28 09:48:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-10-28 09:48:58,278 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-10-28 09:48:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:58,278 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-10-28 09:48:58,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-10-28 09:48:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:48:58,280 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:58,280 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:58,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:48:58,281 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:58,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1361466160, now seen corresponding path program 1 times [2021-10-28 09:48:58,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:58,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459590062] [2021-10-28 09:48:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:58,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:58,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:58,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459590062] [2021-10-28 09:48:58,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459590062] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:58,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:58,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:48:58,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768770717] [2021-10-28 09:48:58,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:48:58,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:58,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:48:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:48:58,368 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:58,477 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-10-28 09:48:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:48:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:48:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:58,479 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:48:58,480 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:48:58,480 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:48:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:48:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 09:48:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 54 states have internal predecessors, (63), 3 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) [2021-10-28 09:48:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-10-28 09:48:58,488 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2021-10-28 09:48:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:58,488 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-10-28 09:48:58,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-10-28 09:48:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:48:58,489 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:58,489 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:58,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:48:58,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:58,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1361466159, now seen corresponding path program 1 times [2021-10-28 09:48:58,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:58,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258960364] [2021-10-28 09:48:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:58,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:58,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:58,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:58,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258960364] [2021-10-28 09:48:58,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258960364] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:58,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:58,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:48:58,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945554924] [2021-10-28 09:48:58,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:48:58,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:48:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:48:58,655 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:58,823 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-10-28 09:48:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:48:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 09:48:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:58,825 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:48:58,825 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:48:58,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:48:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:48:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-10-28 09:48:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 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) [2021-10-28 09:48:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-10-28 09:48:58,834 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-10-28 09:48:58,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:58,834 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-10-28 09:48:58,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-10-28 09:48:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:48:58,836 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:58,836 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:58,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:48:58,836 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:58,837 INFO L85 PathProgramCache]: Analyzing trace with hash -179010490, now seen corresponding path program 1 times [2021-10-28 09:48:58,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:58,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902731514] [2021-10-28 09:48:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:58,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:58,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:58,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:58,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902731514] [2021-10-28 09:48:58,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902731514] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:58,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:58,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:48:58,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130426479] [2021-10-28 09:48:58,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:48:58,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:58,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:48:58,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:48:58,909 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:59,020 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-28 09:48:59,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:48:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:48:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:59,022 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:48:59,022 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 09:48:59,023 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:48:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 09:48:59,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-28 09:48:59,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 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) [2021-10-28 09:48:59,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-28 09:48:59,029 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-10-28 09:48:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:59,029 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-28 09:48:59,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-28 09:48:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:48:59,030 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:59,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:59,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:48:59,031 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:59,031 INFO L85 PathProgramCache]: Analyzing trace with hash -179010438, now seen corresponding path program 1 times [2021-10-28 09:48:59,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:59,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827011039] [2021-10-28 09:48:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:59,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:59,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:59,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827011039] [2021-10-28 09:48:59,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827011039] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:59,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:59,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:48:59,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536861301] [2021-10-28 09:48:59,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:48:59,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:59,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:48:59,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:48:59,134 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:59,275 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-10-28 09:48:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:48:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:48:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:59,278 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:48:59,278 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:48:59,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:48:59,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:48:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 09:48:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 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) [2021-10-28 09:48:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-10-28 09:48:59,298 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-10-28 09:48:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:59,298 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-10-28 09:48:59,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-10-28 09:48:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:48:59,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:59,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:59,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:48:59,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:59,300 INFO L85 PathProgramCache]: Analyzing trace with hash -121752136, now seen corresponding path program 1 times [2021-10-28 09:48:59,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:59,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986571486] [2021-10-28 09:48:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:59,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:59,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:59,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986571486] [2021-10-28 09:48:59,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986571486] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:59,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:59,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:48:59,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874450371] [2021-10-28 09:48:59,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:48:59,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:48:59,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:48:59,377 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:59,480 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-10-28 09:48:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:48:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:48:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:59,483 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:48:59,483 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 09:48:59,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:48:59,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 09:48:59,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-28 09:48:59,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 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) [2021-10-28 09:48:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-10-28 09:48:59,499 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-10-28 09:48:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:59,500 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-10-28 09:48:59,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-10-28 09:48:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:48:59,501 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:59,501 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:59,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:48:59,501 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:59,502 INFO L85 PathProgramCache]: Analyzing trace with hash -121752135, now seen corresponding path program 1 times [2021-10-28 09:48:59,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:59,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398132141] [2021-10-28 09:48:59,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:59,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:59,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:59,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398132141] [2021-10-28 09:48:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398132141] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:59,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:59,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:48:59,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394167822] [2021-10-28 09:48:59,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:48:59,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:48:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:48:59,640 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:48:59,817 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-10-28 09:48:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:48:59,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:48:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:48:59,820 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:48:59,820 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:48:59,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:48:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:48:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-10-28 09:48:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 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) [2021-10-28 09:48:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-10-28 09:48:59,834 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-10-28 09:48:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:48:59,834 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-10-28 09:48:59,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:48:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-10-28 09:48:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:48:59,836 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:48:59,836 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:48:59,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:48:59,837 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:48:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:48:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1254357838, now seen corresponding path program 1 times [2021-10-28 09:48:59,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:48:59,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730143128] [2021-10-28 09:48:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:48:59,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:48:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:48:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:48:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:48:59,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:48:59,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730143128] [2021-10-28 09:48:59,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730143128] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:48:59,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:48:59,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:48:59,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057127958] [2021-10-28 09:48:59,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:48:59,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:48:59,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:48:59,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:48:59,955 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:00,061 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-10-28 09:49:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:49:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-28 09:49:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:00,063 INFO L225 Difference]: With dead ends: 71 [2021-10-28 09:49:00,064 INFO L226 Difference]: Without dead ends: 71 [2021-10-28 09:49:00,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:49:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-28 09:49:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-28 09:49:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 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) [2021-10-28 09:49:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-10-28 09:49:00,073 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-10-28 09:49:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:00,073 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-10-28 09:49:00,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-10-28 09:49:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:49:00,074 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:00,075 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:00,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:49:00,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:00,076 INFO L85 PathProgramCache]: Analyzing trace with hash 498238100, now seen corresponding path program 1 times [2021-10-28 09:49:00,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:00,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653578700] [2021-10-28 09:49:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:00,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:00,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:00,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:00,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653578700] [2021-10-28 09:49:00,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653578700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:00,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501762497] [2021-10-28 09:49:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:00,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:00,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:00,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:49:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:49:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:00,549 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:49:00,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:49:00,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:49:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:00,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501762497] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:00,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:00,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 09:49:00,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62599394] [2021-10-28 09:49:00,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:49:00,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:00,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:49:00,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:49:00,737 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:00,915 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-10-28 09:49:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:49:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 09:49:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:00,918 INFO L225 Difference]: With dead ends: 90 [2021-10-28 09:49:00,918 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 09:49:00,918 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:49:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 09:49:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-10-28 09:49:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 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) [2021-10-28 09:49:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-28 09:49:00,923 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-10-28 09:49:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:00,923 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-28 09:49:00,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-28 09:49:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:49:00,925 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:00,925 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:00,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:01,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:01,143 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1936156247, now seen corresponding path program 1 times [2021-10-28 09:49:01,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:01,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881044693] [2021-10-28 09:49:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:01,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:01,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:01,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881044693] [2021-10-28 09:49:01,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881044693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:01,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:01,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:49:01,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074308021] [2021-10-28 09:49:01,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:49:01,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:49:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:49:01,195 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:01,302 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 09:49:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:49:01,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:49:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:01,303 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:49:01,303 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:49:01,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:49:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:49:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 09:49:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 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) [2021-10-28 09:49:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:49:01,307 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-28 09:49:01,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:01,309 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:49:01,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,309 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:49:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:49:01,311 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:01,312 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:01,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:49:01,312 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1936156248, now seen corresponding path program 1 times [2021-10-28 09:49:01,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:01,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136223164] [2021-10-28 09:49:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:01,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:01,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:01,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136223164] [2021-10-28 09:49:01,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136223164] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:01,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:01,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:49:01,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577305705] [2021-10-28 09:49:01,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:49:01,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:01,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:49:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:49:01,424 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:01,634 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-10-28 09:49:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:49:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:49:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:01,636 INFO L225 Difference]: With dead ends: 86 [2021-10-28 09:49:01,636 INFO L226 Difference]: Without dead ends: 86 [2021-10-28 09:49:01,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:49:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-28 09:49:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-10-28 09:49:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 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) [2021-10-28 09:49:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-10-28 09:49:01,640 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-10-28 09:49:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:01,640 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-10-28 09:49:01,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-10-28 09:49:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:49:01,641 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:01,641 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:01,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:49:01,642 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:01,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1591790588, now seen corresponding path program 1 times [2021-10-28 09:49:01,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:01,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528971379] [2021-10-28 09:49:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:01,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:01,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:01,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528971379] [2021-10-28 09:49:01,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528971379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:01,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878687357] [2021-10-28 09:49:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:01,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:01,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:01,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:49:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:49:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:01,898 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:49:01,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:49:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:02,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878687357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:02,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:02,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 09:49:02,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430726122] [2021-10-28 09:49:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:49:02,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:49:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:49:02,024 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:02,160 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-28 09:49:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:49:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-28 09:49:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:02,161 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:49:02,161 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:49:02,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:49:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:49:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-10-28 09:49:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 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) [2021-10-28 09:49:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:49:02,165 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-10-28 09:49:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:02,165 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:49:02,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:49:02,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:49:02,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:02,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:02,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:02,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 09:49:02,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash 168377437, now seen corresponding path program 1 times [2021-10-28 09:49:02,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:02,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751702830] [2021-10-28 09:49:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:02,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:02,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:02,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751702830] [2021-10-28 09:49:02,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751702830] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:02,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:02,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:49:02,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140860007] [2021-10-28 09:49:02,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:49:02,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:49:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:49:02,438 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:02,569 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 09:49:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:49:02,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 09:49:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:02,571 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:49:02,571 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:49:02,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:49:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:49:02,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-10-28 09:49:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 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) [2021-10-28 09:49:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-10-28 09:49:02,573 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-10-28 09:49:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:02,574 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-10-28 09:49:02,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-10-28 09:49:02,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:49:02,575 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:02,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:02,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:49:02,575 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:02,575 INFO L85 PathProgramCache]: Analyzing trace with hash 168377438, now seen corresponding path program 1 times [2021-10-28 09:49:02,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:02,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905706175] [2021-10-28 09:49:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:02,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:02,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:02,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905706175] [2021-10-28 09:49:02,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905706175] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:02,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:02,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:49:02,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940581082] [2021-10-28 09:49:02,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:49:02,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:49:02,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:49:02,664 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:02,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:02,898 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-10-28 09:49:02,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:49:02,899 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 09:49:02,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:02,899 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:49:02,899 INFO L226 Difference]: Without dead ends: 76 [2021-10-28 09:49:02,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:49:02,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-28 09:49:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-10-28 09:49:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 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) [2021-10-28 09:49:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-10-28 09:49:02,903 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-10-28 09:49:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:02,903 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-10-28 09:49:02,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-10-28 09:49:02,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:49:02,904 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:02,904 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:02,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:49:02,904 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1415217207, now seen corresponding path program 1 times [2021-10-28 09:49:02,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:02,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452990972] [2021-10-28 09:49:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:02,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:02,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 09:49:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:02,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:02,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452990972] [2021-10-28 09:49:02,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452990972] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:02,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:02,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:49:02,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907616209] [2021-10-28 09:49:02,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:49:02,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:02,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:49:02,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:49:02,994 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-28 09:49:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:03,071 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-10-28 09:49:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:49:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 23 [2021-10-28 09:49:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:03,073 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:49:03,074 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:49:03,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:49:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:49:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 09:49:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-28 09:49:03,078 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-10-28 09:49:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:03,078 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-28 09:49:03,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-10-28 09:49:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-28 09:49:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 09:49:03,081 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:03,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:03,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:49:03,082 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash 808083893, now seen corresponding path program 1 times [2021-10-28 09:49:03,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:03,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389217692] [2021-10-28 09:49:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:03,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:03,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:03,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:03,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389217692] [2021-10-28 09:49:03,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389217692] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:03,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:03,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:49:03,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752011914] [2021-10-28 09:49:03,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:49:03,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:03,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:49:03,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:49:03,124 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:03,178 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-28 09:49:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:49:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-28 09:49:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:03,180 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:49:03,180 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:49:03,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:49:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:49:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-28 09:49:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-28 09:49:03,184 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-10-28 09:49:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:03,185 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-28 09:49:03,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-28 09:49:03,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:49:03,186 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:03,186 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:03,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:49:03,187 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash -826319086, now seen corresponding path program 1 times [2021-10-28 09:49:03,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:03,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044543660] [2021-10-28 09:49:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:03,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:03,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:03,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:03,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044543660] [2021-10-28 09:49:03,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044543660] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:03,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:03,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 09:49:03,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849247179] [2021-10-28 09:49:03,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 09:49:03,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:03,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 09:49:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:49:03,332 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:03,542 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-10-28 09:49:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:49:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 09:49:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:03,543 INFO L225 Difference]: With dead ends: 77 [2021-10-28 09:49:03,543 INFO L226 Difference]: Without dead ends: 59 [2021-10-28 09:49:03,543 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:49:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-28 09:49:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-28 09:49:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-28 09:49:03,546 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-10-28 09:49:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:03,546 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-28 09:49:03,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-28 09:49:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 09:49:03,547 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:03,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:03,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:49:03,547 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:03,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:03,548 INFO L85 PathProgramCache]: Analyzing trace with hash -403617260, now seen corresponding path program 1 times [2021-10-28 09:49:03,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:03,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470474071] [2021-10-28 09:49:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:03,548 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:03,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:03,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470474071] [2021-10-28 09:49:03,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470474071] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:03,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:03,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 09:49:03,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247260270] [2021-10-28 09:49:03,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:49:03,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:49:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:49:03,762 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:04,055 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-10-28 09:49:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:49:04,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-28 09:49:04,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:04,056 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:49:04,056 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 09:49:04,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:49:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 09:49:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-28 09:49:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-10-28 09:49:04,058 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-10-28 09:49:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:04,059 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-10-28 09:49:04,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-10-28 09:49:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:49:04,059 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:04,059 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:04,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 09:49:04,060 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1843673559, now seen corresponding path program 1 times [2021-10-28 09:49:04,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:04,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091848678] [2021-10-28 09:49:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:04,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:04,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:04,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:04,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091848678] [2021-10-28 09:49:04,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091848678] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:04,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:04,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 09:49:04,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368593710] [2021-10-28 09:49:04,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:49:04,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:49:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:49:04,236 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:04,513 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-10-28 09:49:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:49:04,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-10-28 09:49:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:04,515 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:49:04,515 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:49:04,515 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:49:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:49:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-28 09:49:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-10-28 09:49:04,518 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-10-28 09:49:04,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:04,518 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-10-28 09:49:04,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-10-28 09:49:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 09:49:04,519 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:04,519 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:04,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 09:49:04,520 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:04,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1709660053, now seen corresponding path program 1 times [2021-10-28 09:49:04,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:04,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117620245] [2021-10-28 09:49:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:04,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:04,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:04,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117620245] [2021-10-28 09:49:04,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117620245] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:04,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:04,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 09:49:04,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213226736] [2021-10-28 09:49:04,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 09:49:04,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:49:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:49:04,719 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:05,039 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-10-28 09:49:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:49:05,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-10-28 09:49:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:05,040 INFO L225 Difference]: With dead ends: 103 [2021-10-28 09:49:05,041 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 09:49:05,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:49:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 09:49:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-10-28 09:49:05,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:05,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-10-28 09:49:05,044 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-10-28 09:49:05,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:05,044 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-10-28 09:49:05,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-10-28 09:49:05,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:49:05,045 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:05,045 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:05,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 09:49:05,045 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1499760060, now seen corresponding path program 1 times [2021-10-28 09:49:05,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:05,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595730675] [2021-10-28 09:49:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:05,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:05,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:05,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595730675] [2021-10-28 09:49:05,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595730675] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:49:05,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:49:05,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 09:49:05,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121033926] [2021-10-28 09:49:05,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 09:49:05,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:05,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:49:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:49:05,183 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:05,489 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-28 09:49:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:49:05,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-28 09:49:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:05,490 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:49:05,490 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 09:49:05,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:49:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 09:49:05,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-10-28 09:49:05,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:05,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-10-28 09:49:05,493 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-10-28 09:49:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:05,493 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-10-28 09:49:05,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-10-28 09:49:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 09:49:05,493 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:05,494 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:05,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 09:49:05,494 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:05,494 INFO L85 PathProgramCache]: Analyzing trace with hash 385012248, now seen corresponding path program 1 times [2021-10-28 09:49:05,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:05,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526666419] [2021-10-28 09:49:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:05,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:05,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:05,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:05,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526666419] [2021-10-28 09:49:05,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526666419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:05,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928761390] [2021-10-28 09:49:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:05,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:05,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:05,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:49:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:05,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:49:05,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:06,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928761390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:06,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:06,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-10-28 09:49:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843192451] [2021-10-28 09:49:06,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:49:06,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:49:06,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:49:06,020 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:06,367 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-10-28 09:49:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:49:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-28 09:49:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:06,370 INFO L225 Difference]: With dead ends: 76 [2021-10-28 09:49:06,370 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:49:06,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:49:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:49:06,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-10-28 09:49:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-28 09:49:06,373 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 35 [2021-10-28 09:49:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:06,374 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-28 09:49:06,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-28 09:49:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 09:49:06,374 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:06,375 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:06,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-28 09:49:06,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-28 09:49:06,575 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1958963042, now seen corresponding path program 1 times [2021-10-28 09:49:06,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:06,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897288617] [2021-10-28 09:49:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:06,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:06,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:06,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:06,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897288617] [2021-10-28 09:49:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897288617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:06,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598272599] [2021-10-28 09:49:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:06,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:06,695 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:06,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:49:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:49:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:06,907 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:49:06,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:49:06,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:49:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:07,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598272599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:07,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:07,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-28 09:49:07,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414041604] [2021-10-28 09:49:07,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:49:07,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:07,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:49:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:49:07,190 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:07,539 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-10-28 09:49:07,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:49:07,540 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-28 09:49:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:07,541 INFO L225 Difference]: With dead ends: 122 [2021-10-28 09:49:07,541 INFO L226 Difference]: Without dead ends: 122 [2021-10-28 09:49:07,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:49:07,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-28 09:49:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-28 09:49:07,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 81 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-10-28 09:49:07,545 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 38 [2021-10-28 09:49:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:07,545 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-10-28 09:49:07,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-10-28 09:49:07,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 09:49:07,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:07,546 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:49:07,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:07,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 09:49:07,746 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:07,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:07,747 INFO L85 PathProgramCache]: Analyzing trace with hash 950813004, now seen corresponding path program 2 times [2021-10-28 09:49:07,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:07,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286945670] [2021-10-28 09:49:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:07,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:08,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:08,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286945670] [2021-10-28 09:49:08,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286945670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:08,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884671872] [2021-10-28 09:49:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:49:08,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:08,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:08,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:49:08,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:49:08,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:49:08,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:08,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:49:09,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-28 09:49:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:09,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884671872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:09,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:09,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-10-28 09:49:09,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968828580] [2021-10-28 09:49:09,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:49:09,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:09,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:49:09,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:49:09,136 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:09,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:09,874 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-10-28 09:49:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:49:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-10-28 09:49:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:09,877 INFO L225 Difference]: With dead ends: 134 [2021-10-28 09:49:09,878 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 09:49:09,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:49:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 09:49:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-10-28 09:49:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-10-28 09:49:09,887 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 41 [2021-10-28 09:49:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:09,888 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-10-28 09:49:09,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-10-28 09:49:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 09:49:09,889 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:09,890 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:09,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:10,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 09:49:10,099 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:10,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2043759601, now seen corresponding path program 3 times [2021-10-28 09:49:10,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:10,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115864589] [2021-10-28 09:49:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:10,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:10,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:10,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:10,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115864589] [2021-10-28 09:49:10,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115864589] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:10,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133463205] [2021-10-28 09:49:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:49:10,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:10,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:10,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:49:10,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:49:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:10,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:49:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:10,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133463205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:10,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:10,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-28 09:49:10,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567632433] [2021-10-28 09:49:10,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:49:10,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:10,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:49:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:49:10,805 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:11,456 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2021-10-28 09:49:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:49:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-10-28 09:49:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:11,458 INFO L225 Difference]: With dead ends: 170 [2021-10-28 09:49:11,459 INFO L226 Difference]: Without dead ends: 168 [2021-10-28 09:49:11,459 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:49:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-28 09:49:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2021-10-28 09:49:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 125 states have (on average 1.184) internal successors, (148), 129 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2021-10-28 09:49:11,464 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 45 [2021-10-28 09:49:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:11,466 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2021-10-28 09:49:11,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:11,474 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2021-10-28 09:49:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:49:11,475 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:11,475 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:11,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:11,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:49:11,676 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:11,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1906876194, now seen corresponding path program 2 times [2021-10-28 09:49:11,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:11,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020863127] [2021-10-28 09:49:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:11,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:12,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:12,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020863127] [2021-10-28 09:49:12,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020863127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:12,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062909615] [2021-10-28 09:49:12,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:49:12,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:12,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:12,003 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:12,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:49:12,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:49:12,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:12,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 09:49:12,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:12,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:49:12,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:49:12,517 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:49:12,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 09:49:13,164 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:49:13,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-28 09:49:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:13,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062909615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:13,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:13,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-28 09:49:13,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334580141] [2021-10-28 09:49:13,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 09:49:13,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:49:13,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:49:13,217 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:14,190 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-10-28 09:49:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:49:14,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-28 09:49:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:14,192 INFO L225 Difference]: With dead ends: 214 [2021-10-28 09:49:14,192 INFO L226 Difference]: Without dead ends: 190 [2021-10-28 09:49:14,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:49:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-28 09:49:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2021-10-28 09:49:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 174 states have internal predecessors, (199), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2021-10-28 09:49:14,199 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 51 [2021-10-28 09:49:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:14,199 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2021-10-28 09:49:14,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2021-10-28 09:49:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:49:14,200 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:14,200 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-10-28 09:49:14,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:14,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:14,415 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:14,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:14,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1943965187, now seen corresponding path program 4 times [2021-10-28 09:49:14,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:14,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309397500] [2021-10-28 09:49:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:14,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:14,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:14,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309397500] [2021-10-28 09:49:14,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309397500] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:14,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719680573] [2021-10-28 09:49:14,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:49:14,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:14,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:14,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:14,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:49:15,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:49:15,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:15,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:49:15,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:15,127 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:49:15,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:49:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:49:15,798 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:49:15,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-10-28 09:49:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:15,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719680573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:15,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:15,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 32 [2021-10-28 09:49:15,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561677897] [2021-10-28 09:49:15,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:49:15,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:15,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:49:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:49:15,819 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:17,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:17,626 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2021-10-28 09:49:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-28 09:49:17,627 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-28 09:49:17,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:17,628 INFO L225 Difference]: With dead ends: 284 [2021-10-28 09:49:17,628 INFO L226 Difference]: Without dead ends: 255 [2021-10-28 09:49:17,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 09:49:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-10-28 09:49:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2021-10-28 09:49:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1531531531531531) internal successors, (256), 226 states have internal predecessors, (256), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2021-10-28 09:49:17,637 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 51 [2021-10-28 09:49:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:17,638 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2021-10-28 09:49:17,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:17,638 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2021-10-28 09:49:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:49:17,639 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:17,639 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:17,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:17,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:49:17,852 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:17,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:17,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2001819386, now seen corresponding path program 5 times [2021-10-28 09:49:17,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:17,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149915864] [2021-10-28 09:49:17,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:17,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:18,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:18,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:18,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149915864] [2021-10-28 09:49:18,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149915864] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:18,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613424842] [2021-10-28 09:49:18,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:49:18,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:18,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:18,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:18,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:49:18,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:49:18,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 09:49:18,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:18,377 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:49:18,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:49:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613424842] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:18,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:18,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 18 [2021-10-28 09:49:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531729191] [2021-10-28 09:49:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:49:18,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:49:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:49:18,810 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:19,531 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2021-10-28 09:49:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 09:49:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 09:49:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:19,533 INFO L225 Difference]: With dead ends: 298 [2021-10-28 09:49:19,533 INFO L226 Difference]: Without dead ends: 296 [2021-10-28 09:49:19,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:49:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-28 09:49:19,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 252. [2021-10-28 09:49:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 240 states have (on average 1.15) internal successors, (276), 244 states have internal predecessors, (276), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2021-10-28 09:49:19,543 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 55 [2021-10-28 09:49:19,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:19,543 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2021-10-28 09:49:19,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2021-10-28 09:49:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:49:19,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:19,545 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:49:19,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:19,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:49:19,755 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:19,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1800116063, now seen corresponding path program 3 times [2021-10-28 09:49:19,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:19,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35892550] [2021-10-28 09:49:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:19,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:19,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:19,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35892550] [2021-10-28 09:49:19,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35892550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:19,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467358326] [2021-10-28 09:49:19,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:49:19,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:19,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:19,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:19,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:49:20,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-28 09:49:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:49:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:20,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467358326] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:20,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:20,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-10-28 09:49:20,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672907597] [2021-10-28 09:49:20,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:49:20,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:49:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:49:20,951 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:21,557 INFO L93 Difference]: Finished difference Result 403 states and 442 transitions. [2021-10-28 09:49:21,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:49:21,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-10-28 09:49:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:21,560 INFO L225 Difference]: With dead ends: 403 [2021-10-28 09:49:21,560 INFO L226 Difference]: Without dead ends: 403 [2021-10-28 09:49:21,560 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:49:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-10-28 09:49:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-10-28 09:49:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 310 states have (on average 1.1483870967741936) internal successors, (356), 314 states have internal predecessors, (356), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 363 transitions. [2021-10-28 09:49:21,572 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 363 transitions. Word has length 55 [2021-10-28 09:49:21,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:21,572 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 363 transitions. [2021-10-28 09:49:21,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 363 transitions. [2021-10-28 09:49:21,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 09:49:21,574 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:21,574 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:21,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:21,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:49:21,791 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -709186118, now seen corresponding path program 6 times [2021-10-28 09:49:21,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:21,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686000551] [2021-10-28 09:49:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:21,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:22,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:22,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686000551] [2021-10-28 09:49:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686000551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:22,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507753892] [2021-10-28 09:49:22,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:49:22,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:22,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:22,178 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:22,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:49:22,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:49:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 09:49:22,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:22,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:49:23,574 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-10-28 09:49:23,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 24 [2021-10-28 09:49:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:23,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507753892] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:23,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:23,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 35 [2021-10-28 09:49:23,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439239250] [2021-10-28 09:49:23,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:49:23,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:23,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:49:23,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:49:23,597 INFO L87 Difference]: Start difference. First operand 322 states and 363 transitions. Second operand has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:25,977 INFO L93 Difference]: Finished difference Result 508 states and 554 transitions. [2021-10-28 09:49:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:49:25,980 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-10-28 09:49:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:25,983 INFO L225 Difference]: With dead ends: 508 [2021-10-28 09:49:25,983 INFO L226 Difference]: Without dead ends: 470 [2021-10-28 09:49:25,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=398, Invalid=3142, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:49:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-10-28 09:49:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 412. [2021-10-28 09:49:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 399 states have (on average 1.137844611528822) internal successors, (454), 403 states have internal predecessors, (454), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-10-28 09:49:25,998 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 61 [2021-10-28 09:49:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:25,999 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-10-28 09:49:25,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-10-28 09:49:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 09:49:26,000 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:26,001 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:49:26,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-28 09:49:26,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:26,216 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash 68362493, now seen corresponding path program 7 times [2021-10-28 09:49:26,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:26,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867880595] [2021-10-28 09:49:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:26,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:26,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:26,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867880595] [2021-10-28 09:49:26,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867880595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:26,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13018557] [2021-10-28 09:49:26,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:49:26,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:26,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:26,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:49:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:26,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:49:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:27,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13018557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:27,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:27,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-10-28 09:49:27,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237923713] [2021-10-28 09:49:27,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:49:27,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:49:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:49:27,281 INFO L87 Difference]: Start difference. First operand 412 states and 462 transitions. Second operand has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:49:28,188 INFO L93 Difference]: Finished difference Result 517 states and 572 transitions. [2021-10-28 09:49:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 09:49:28,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-10-28 09:49:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:49:28,192 INFO L225 Difference]: With dead ends: 517 [2021-10-28 09:49:28,192 INFO L226 Difference]: Without dead ends: 515 [2021-10-28 09:49:28,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:49:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-10-28 09:49:28,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 436. [2021-10-28 09:49:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 423 states have (on average 1.1371158392434988) internal successors, (481), 427 states have internal predecessors, (481), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:28,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 489 transitions. [2021-10-28 09:49:28,217 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 489 transitions. Word has length 65 [2021-10-28 09:49:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:49:28,217 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 489 transitions. [2021-10-28 09:49:28,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:49:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 489 transitions. [2021-10-28 09:49:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-28 09:49:28,226 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:49:28,227 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-28 09:49:28,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:49:28,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 09:49:28,455 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:49:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:49:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1213534789, now seen corresponding path program 4 times [2021-10-28 09:49:28,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:49:28,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238826729] [2021-10-28 09:49:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:49:28,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:49:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:29,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:49:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:49:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:49:29,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:49:29,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238826729] [2021-10-28 09:49:29,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238826729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:29,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964552093] [2021-10-28 09:49:29,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:49:29,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:49:29,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:49:29,278 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:49:29,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:49:29,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:49:29,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:49:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-28 09:49:29,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:49:29,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:49:29,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-28 09:49:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:49:30,220 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-10-28 09:49:30,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-10-28 09:49:31,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 09:49:31,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2021-10-28 09:49:32,820 INFO L354 Elim1Store]: treesize reduction 58, result has 31.0 percent of original size [2021-10-28 09:49:32,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 57 [2021-10-28 09:49:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:49:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964552093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:49:32,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:49:32,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 46 [2021-10-28 09:49:32,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265718856] [2021-10-28 09:49:32,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-28 09:49:32,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:49:32,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-28 09:49:32,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1954, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 09:49:32,913 INFO L87 Difference]: Start difference. First operand 436 states and 489 transitions. Second operand has 46 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:04,085 WARN L207 SmtUtils]: Spent 8.54 s on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-10-28 09:50:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:51,030 INFO L93 Difference]: Finished difference Result 792 states and 875 transitions. [2021-10-28 09:50:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-28 09:50:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-10-28 09:50:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:50:51,034 INFO L225 Difference]: With dead ends: 792 [2021-10-28 09:50:51,034 INFO L226 Difference]: Without dead ends: 610 [2021-10-28 09:50:51,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=829, Invalid=7909, Unknown=4, NotChecked=0, Total=8742 [2021-10-28 09:50:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-10-28 09:50:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 550. [2021-10-28 09:50:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 536 states have (on average 1.1492537313432836) internal successors, (616), 540 states have internal predecessors, (616), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 625 transitions. [2021-10-28 09:50:51,054 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 625 transitions. Word has length 68 [2021-10-28 09:50:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:50:51,055 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 625 transitions. [2021-10-28 09:50:51,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 625 transitions. [2021-10-28 09:50:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 09:50:51,057 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:50:51,057 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:50:51,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:51,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:51,278 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:50:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1171066993, now seen corresponding path program 8 times [2021-10-28 09:50:51,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:51,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356328996] [2021-10-28 09:50:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:51,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:51,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:50:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:51,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356328996] [2021-10-28 09:50:51,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356328996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727646433] [2021-10-28 09:50:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:50:51,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:51,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:51,627 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:51,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:50:52,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:50:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:50:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:52,350 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:50:52,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:50:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:50:53,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:50:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-28 09:50:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:53,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727646433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:53,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:53,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-10-28 09:50:53,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863952740] [2021-10-28 09:50:53,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 09:50:53,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 09:50:53,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:50:53,964 INFO L87 Difference]: Start difference. First operand 550 states and 625 transitions. Second operand has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:50:58,052 INFO L93 Difference]: Finished difference Result 1060 states and 1161 transitions. [2021-10-28 09:50:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 09:50:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-10-28 09:50:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:50:58,057 INFO L225 Difference]: With dead ends: 1060 [2021-10-28 09:50:58,057 INFO L226 Difference]: Without dead ends: 910 [2021-10-28 09:50:58,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=472, Invalid=4930, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 09:50:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-10-28 09:50:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 698. [2021-10-28 09:50:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 683 states have (on average 1.1420204978038067) internal successors, (780), 687 states have internal predecessors, (780), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 790 transitions. [2021-10-28 09:50:58,085 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 790 transitions. Word has length 71 [2021-10-28 09:50:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:50:58,085 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 790 transitions. [2021-10-28 09:50:58,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:50:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 790 transitions. [2021-10-28 09:50:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-28 09:50:58,087 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:50:58,088 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:50:58,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:50:58,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:58,314 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:50:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:50:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1329333336, now seen corresponding path program 5 times [2021-10-28 09:50:58,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:50:58,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043537928] [2021-10-28 09:50:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:50:58,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:50:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:58,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:50:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:50:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:58,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:50:58,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043537928] [2021-10-28 09:50:58,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043537928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:58,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695661689] [2021-10-28 09:50:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:50:58,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:50:58,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:50:58,535 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:50:58,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:50:59,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-28 09:50:59,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:50:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 09:50:59,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:50:59,359 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:50:59,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 09:50:59,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:50:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:50:59,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695661689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:50:59,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:50:59,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-10-28 09:50:59,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130440410] [2021-10-28 09:50:59,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:50:59,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:50:59,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:50:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:50:59,879 INFO L87 Difference]: Start difference. First operand 698 states and 790 transitions. Second operand has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:00,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:00,640 INFO L93 Difference]: Finished difference Result 984 states and 1095 transitions. [2021-10-28 09:51:00,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:51:00,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-10-28 09:51:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:00,646 INFO L225 Difference]: With dead ends: 984 [2021-10-28 09:51:00,646 INFO L226 Difference]: Without dead ends: 984 [2021-10-28 09:51:00,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:51:00,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-10-28 09:51:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 836. [2021-10-28 09:51:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 821 states have (on average 1.1388550548112057) internal successors, (935), 825 states have internal predecessors, (935), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 945 transitions. [2021-10-28 09:51:00,692 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 945 transitions. Word has length 72 [2021-10-28 09:51:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:00,692 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 945 transitions. [2021-10-28 09:51:00,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:00,693 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 945 transitions. [2021-10-28 09:51:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-28 09:51:00,695 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:00,695 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:00,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-28 09:51:00,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 09:51:00,909 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:51:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1811031592, now seen corresponding path program 9 times [2021-10-28 09:51:00,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:00,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267084494] [2021-10-28 09:51:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:00,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:01,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:51:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:01,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:01,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267084494] [2021-10-28 09:51:01,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267084494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:01,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340068054] [2021-10-28 09:51:01,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:51:01,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:01,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:01,263 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:01,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:51:02,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-28 09:51:02,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-28 09:51:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:51:02,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:51:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:02,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340068054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:02,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:02,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 35 [2021-10-28 09:51:02,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275050105] [2021-10-28 09:51:02,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:51:02,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:51:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:51:02,854 INFO L87 Difference]: Start difference. First operand 836 states and 945 transitions. Second operand has 35 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:04,544 INFO L93 Difference]: Finished difference Result 1277 states and 1412 transitions. [2021-10-28 09:51:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:51:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-10-28 09:51:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:04,550 INFO L225 Difference]: With dead ends: 1277 [2021-10-28 09:51:04,550 INFO L226 Difference]: Without dead ends: 1098 [2021-10-28 09:51:04,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:51:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-10-28 09:51:04,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1003. [2021-10-28 09:51:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 987 states have (on average 1.1347517730496455) internal successors, (1120), 991 states have internal predecessors, (1120), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1131 transitions. [2021-10-28 09:51:04,581 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1131 transitions. Word has length 81 [2021-10-28 09:51:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:04,581 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1131 transitions. [2021-10-28 09:51:04,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1131 transitions. [2021-10-28 09:51:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 09:51:04,584 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:04,584 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:04,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:04,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:04,802 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:51:04,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash 10181099, now seen corresponding path program 10 times [2021-10-28 09:51:04,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:04,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064091083] [2021-10-28 09:51:04,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:04,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:05,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:51:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:05,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:05,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064091083] [2021-10-28 09:51:05,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064091083] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:05,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628227930] [2021-10-28 09:51:05,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:51:05,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:05,182 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:51:05,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:51:05,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-28 09:51:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:05,891 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:51:05,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:51:06,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:51:07,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:51:07,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-10-28 09:51:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628227930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:07,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:07,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 36 [2021-10-28 09:51:07,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62127895] [2021-10-28 09:51:07,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:51:07,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:51:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:51:07,283 INFO L87 Difference]: Start difference. First operand 1003 states and 1131 transitions. Second operand has 37 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:51:10,224 INFO L93 Difference]: Finished difference Result 1346 states and 1483 transitions. [2021-10-28 09:51:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:51:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-10-28 09:51:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:51:10,231 INFO L225 Difference]: With dead ends: 1346 [2021-10-28 09:51:10,231 INFO L226 Difference]: Without dead ends: 1344 [2021-10-28 09:51:10,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=344, Invalid=3078, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 09:51:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-10-28 09:51:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1045. [2021-10-28 09:51:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1029 states have (on average 1.1350826044703595) internal successors, (1168), 1033 states have internal predecessors, (1168), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1179 transitions. [2021-10-28 09:51:10,278 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1179 transitions. Word has length 85 [2021-10-28 09:51:10,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:51:10,278 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1179 transitions. [2021-10-28 09:51:10,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:10,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1179 transitions. [2021-10-28 09:51:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 09:51:10,284 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:51:10,284 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:51:10,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:51:10,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 09:51:10,499 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:51:10,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:51:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1327649636, now seen corresponding path program 6 times [2021-10-28 09:51:10,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:51:10,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427023922] [2021-10-28 09:51:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:51:10,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:51:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:51:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:51:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:11,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:51:11,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427023922] [2021-10-28 09:51:11,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427023922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:11,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938366802] [2021-10-28 09:51:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:51:11,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:51:11,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:51:11,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:51:11,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:51:11,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-28 09:51:11,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:51:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 09:51:11,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:51:11,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:51:12,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:51:12,334 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:51:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-28 09:51:14,960 INFO L354 Elim1Store]: treesize reduction 79, result has 34.7 percent of original size [2021-10-28 09:51:14,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 72 [2021-10-28 09:51:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:51:15,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938366802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:51:15,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:51:15,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-10-28 09:51:15,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649399462] [2021-10-28 09:51:15,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:51:15,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:51:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:51:15,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1790, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:51:15,049 INFO L87 Difference]: Start difference. First operand 1045 states and 1179 transitions. Second operand has 44 states, 43 states have (on average 3.511627906976744) internal successors, (151), 41 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:51:24,990 WARN L207 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-10-28 09:51:31,186 WARN L207 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-10-28 09:51:37,562 WARN L207 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-10-28 09:51:44,202 WARN L207 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-10-28 09:51:50,695 WARN L207 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-10-28 09:52:07,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:07,119 INFO L93 Difference]: Finished difference Result 2438 states and 2694 transitions. [2021-10-28 09:52:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-28 09:52:07,121 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.511627906976744) internal successors, (151), 41 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-10-28 09:52:07,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:07,127 INFO L225 Difference]: With dead ends: 2438 [2021-10-28 09:52:07,127 INFO L226 Difference]: Without dead ends: 1575 [2021-10-28 09:52:07,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=694, Invalid=7678, Unknown=0, NotChecked=0, Total=8372 [2021-10-28 09:52:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-10-28 09:52:07,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1135. [2021-10-28 09:52:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1118 states have (on average 1.1368515205724508) internal successors, (1271), 1122 states have internal predecessors, (1271), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1283 transitions. [2021-10-28 09:52:07,161 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1283 transitions. Word has length 85 [2021-10-28 09:52:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:07,162 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1283 transitions. [2021-10-28 09:52:07,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.511627906976744) internal successors, (151), 41 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1283 transitions. [2021-10-28 09:52:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 09:52:07,165 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:07,165 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:07,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:07,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-28 09:52:07,366 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:52:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1030247833, now seen corresponding path program 7 times [2021-10-28 09:52:07,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:07,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784842966] [2021-10-28 09:52:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:07,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:52:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:07,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:07,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784842966] [2021-10-28 09:52:07,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784842966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:07,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871969663] [2021-10-28 09:52:07,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:52:07,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:07,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:07,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:52:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:52:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:08,986 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:08,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871969663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:08,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:08,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-10-28 09:52:08,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39053033] [2021-10-28 09:52:08,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 09:52:08,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:08,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:52:08,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:52:08,988 INFO L87 Difference]: Start difference. First operand 1135 states and 1283 transitions. Second operand has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:09,845 INFO L93 Difference]: Finished difference Result 1509 states and 1683 transitions. [2021-10-28 09:52:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:52:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-10-28 09:52:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:09,851 INFO L225 Difference]: With dead ends: 1509 [2021-10-28 09:52:09,851 INFO L226 Difference]: Without dead ends: 1509 [2021-10-28 09:52:09,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:52:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-10-28 09:52:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1316. [2021-10-28 09:52:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1299 states have (on average 1.134719014626636) internal successors, (1474), 1303 states have internal predecessors, (1474), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1486 transitions. [2021-10-28 09:52:09,883 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1486 transitions. Word has length 89 [2021-10-28 09:52:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:09,884 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1486 transitions. [2021-10-28 09:52:09,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1486 transitions. [2021-10-28 09:52:09,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-28 09:52:09,887 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:09,887 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:09,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:10,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:52:10,103 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:52:10,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1196842719, now seen corresponding path program 11 times [2021-10-28 09:52:10,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:10,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332712620] [2021-10-28 09:52:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:10,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:10,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:52:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:10,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:10,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332712620] [2021-10-28 09:52:10,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332712620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:10,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332133057] [2021-10-28 09:52:10,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:52:10,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:10,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:10,507 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:10,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:52:11,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 09:52:11,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:11,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-28 09:52:11,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:11,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:52:12,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:52:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:12,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332133057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:12,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:12,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 38 [2021-10-28 09:52:12,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915681585] [2021-10-28 09:52:12,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-28 09:52:12,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-28 09:52:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:52:12,109 INFO L87 Difference]: Start difference. First operand 1316 states and 1486 transitions. Second operand has 38 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 35 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:13,957 INFO L93 Difference]: Finished difference Result 1985 states and 2198 transitions. [2021-10-28 09:52:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:52:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 35 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-10-28 09:52:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:13,963 INFO L225 Difference]: With dead ends: 1985 [2021-10-28 09:52:13,964 INFO L226 Difference]: Without dead ends: 1698 [2021-10-28 09:52:13,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:52:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-10-28 09:52:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1554. [2021-10-28 09:52:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1536 states have (on average 1.1321614583333333) internal successors, (1739), 1540 states have internal predecessors, (1739), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 1752 transitions. [2021-10-28 09:52:14,008 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 1752 transitions. Word has length 91 [2021-10-28 09:52:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:14,008 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 1752 transitions. [2021-10-28 09:52:14,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 35 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 1752 transitions. [2021-10-28 09:52:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:52:14,011 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:14,012 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:14,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:14,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-28 09:52:14,226 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:52:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:14,227 INFO L85 PathProgramCache]: Analyzing trace with hash -695207198, now seen corresponding path program 12 times [2021-10-28 09:52:14,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:14,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3399907] [2021-10-28 09:52:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:14,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:52:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:14,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:14,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3399907] [2021-10-28 09:52:14,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3399907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:14,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114720593] [2021-10-28 09:52:14,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:52:14,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:14,638 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:14,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:52:15,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-28 09:52:15,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:52:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:16,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114720593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:16,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:16,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-10-28 09:52:16,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494162079] [2021-10-28 09:52:16,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 09:52:16,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 09:52:16,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:52:16,496 INFO L87 Difference]: Start difference. First operand 1554 states and 1752 transitions. Second operand has 43 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:17,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:17,971 INFO L93 Difference]: Finished difference Result 1932 states and 2145 transitions. [2021-10-28 09:52:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:52:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-10-28 09:52:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:17,983 INFO L225 Difference]: With dead ends: 1932 [2021-10-28 09:52:17,983 INFO L226 Difference]: Without dead ends: 1930 [2021-10-28 09:52:17,984 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=2482, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:52:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-10-28 09:52:18,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1608. [2021-10-28 09:52:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1590 states have (on average 1.1327044025157234) internal successors, (1801), 1594 states have internal predecessors, (1801), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1814 transitions. [2021-10-28 09:52:18,023 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1814 transitions. Word has length 95 [2021-10-28 09:52:18,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:18,023 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 1814 transitions. [2021-10-28 09:52:18,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:18,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1814 transitions. [2021-10-28 09:52:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-28 09:52:18,027 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:18,027 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:18,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:18,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:52:18,254 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:52:18,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:18,255 INFO L85 PathProgramCache]: Analyzing trace with hash -982111594, now seen corresponding path program 13 times [2021-10-28 09:52:18,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:18,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735651801] [2021-10-28 09:52:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:18,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:52:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:18,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:18,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735651801] [2021-10-28 09:52:18,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735651801] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:18,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809492300] [2021-10-28 09:52:18,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:52:18,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:18,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:18,724 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:18,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:52:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 09:52:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:19,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-10-28 09:52:21,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:52:21,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-10-28 09:52:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:22,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809492300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:22,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:22,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 51 [2021-10-28 09:52:22,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682453112] [2021-10-28 09:52:22,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 09:52:22,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 09:52:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:52:22,154 INFO L87 Difference]: Start difference. First operand 1608 states and 1814 transitions. Second operand has 51 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:35,547 INFO L93 Difference]: Finished difference Result 2791 states and 3063 transitions. [2021-10-28 09:52:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-28 09:52:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-10-28 09:52:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:35,556 INFO L225 Difference]: With dead ends: 2791 [2021-10-28 09:52:35,556 INFO L226 Difference]: Without dead ends: 2463 [2021-10-28 09:52:35,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=572, Invalid=6738, Unknown=0, NotChecked=0, Total=7310 [2021-10-28 09:52:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-10-28 09:52:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1930. [2021-10-28 09:52:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1911 states have (on average 1.1318681318681318) internal successors, (2163), 1915 states have internal predecessors, (2163), 13 states have call successors, (13), 13 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:35,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2177 transitions. [2021-10-28 09:52:35,597 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2177 transitions. Word has length 101 [2021-10-28 09:52:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 2177 transitions. [2021-10-28 09:52:35,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:35,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2177 transitions. [2021-10-28 09:52:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-28 09:52:35,601 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:35,602 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:35,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:35,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:35,814 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:52:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1952660917, now seen corresponding path program 8 times [2021-10-28 09:52:35,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:35,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411168042] [2021-10-28 09:52:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:35,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:52:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:36,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:36,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411168042] [2021-10-28 09:52:36,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411168042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:36,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96236936] [2021-10-28 09:52:36,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:52:36,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:36,488 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:36,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:52:37,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:52:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-28 09:52:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:37,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:52:37,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:52:38,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-28 09:52:41,000 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-10-28 09:52:41,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 37 [2021-10-28 09:52:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:41,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96236936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:41,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:41,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-10-28 09:52:41,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055928573] [2021-10-28 09:52:41,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-28 09:52:41,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-28 09:52:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:52:41,052 INFO L87 Difference]: Start difference. First operand 1930 states and 2177 transitions. Second operand has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:52:45,449 INFO L93 Difference]: Finished difference Result 4603 states and 5160 transitions. [2021-10-28 09:52:45,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-28 09:52:45,450 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-10-28 09:52:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:52:45,468 INFO L225 Difference]: With dead ends: 4603 [2021-10-28 09:52:45,468 INFO L226 Difference]: Without dead ends: 4521 [2021-10-28 09:52:45,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-10-28 09:52:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-10-28 09:52:45,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 2973. [2021-10-28 09:52:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2947 states have (on average 1.1262300644723449) internal successors, (3319), 2951 states have internal predecessors, (3319), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3340 transitions. [2021-10-28 09:52:45,538 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3340 transitions. Word has length 102 [2021-10-28 09:52:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:52:45,539 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 3340 transitions. [2021-10-28 09:52:45,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:52:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3340 transitions. [2021-10-28 09:52:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 09:52:45,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:52:45,546 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:52:45,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:52:45,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:45,770 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:52:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:52:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1692635886, now seen corresponding path program 9 times [2021-10-28 09:52:45,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:52:45,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38768522] [2021-10-28 09:52:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:52:45,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:52:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:46,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:52:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:52:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:52:46,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:52:46,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38768522] [2021-10-28 09:52:46,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38768522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:46,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550080807] [2021-10-28 09:52:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:52:46,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:52:46,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:52:46,083 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:52:46,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:52:47,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:52:47,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:52:47,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-28 09:52:47,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:52:47,656 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:52:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:52:47,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 09:52:47,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-28 09:52:47,983 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 09:52:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-28 09:52:49,880 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-10-28 09:52:49,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 83 [2021-10-28 09:52:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-10-28 09:52:50,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550080807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:52:50,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:52:50,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-10-28 09:52:50,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200844134] [2021-10-28 09:52:50,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:52:50,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:52:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:52:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:52:50,111 INFO L87 Difference]: Start difference. First operand 2973 states and 3340 transitions. Second operand has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:29,889 INFO L93 Difference]: Finished difference Result 4720 states and 5265 transitions. [2021-10-28 09:53:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-28 09:53:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-10-28 09:53:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:29,895 INFO L225 Difference]: With dead ends: 4720 [2021-10-28 09:53:29,895 INFO L226 Difference]: Without dead ends: 1638 [2021-10-28 09:53:29,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4321 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=1600, Invalid=13900, Unknown=0, NotChecked=0, Total=15500 [2021-10-28 09:53:29,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-10-28 09:53:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 788. [2021-10-28 09:53:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 777 states have (on average 1.1454311454311454) internal successors, (890), 779 states have internal predecessors, (890), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 898 transitions. [2021-10-28 09:53:29,913 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 898 transitions. Word has length 106 [2021-10-28 09:53:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:29,913 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 898 transitions. [2021-10-28 09:53:29,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 898 transitions. [2021-10-28 09:53:29,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-28 09:53:29,916 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:29,916 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:29,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:30,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-28 09:53:30,131 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:53:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:30,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1495136589, now seen corresponding path program 14 times [2021-10-28 09:53:30,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:30,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213385369] [2021-10-28 09:53:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:30,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:30,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:30,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:53:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:53:30,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:30,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213385369] [2021-10-28 09:53:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213385369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:30,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500594844] [2021-10-28 09:53:30,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:53:30,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:30,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:30,613 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:30,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:53:32,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:53:32,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-28 09:53:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:53:32,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:53:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:53:32,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500594844] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:32,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:32,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 44 [2021-10-28 09:53:32,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815472872] [2021-10-28 09:53:32,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:53:32,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:53:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:53:32,920 INFO L87 Difference]: Start difference. First operand 788 states and 898 transitions. Second operand has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:35,254 INFO L93 Difference]: Finished difference Result 1578 states and 1742 transitions. [2021-10-28 09:53:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:53:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-10-28 09:53:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:35,267 INFO L225 Difference]: With dead ends: 1578 [2021-10-28 09:53:35,267 INFO L226 Difference]: Without dead ends: 823 [2021-10-28 09:53:35,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:53:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-10-28 09:53:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 808. [2021-10-28 09:53:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 797 states have (on average 1.1417816813048933) internal successors, (910), 799 states have internal predecessors, (910), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 918 transitions. [2021-10-28 09:53:35,279 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 918 transitions. Word has length 111 [2021-10-28 09:53:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:35,280 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 918 transitions. [2021-10-28 09:53:35,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 918 transitions. [2021-10-28 09:53:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 09:53:35,283 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:53:35,283 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:35,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:35,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 09:53:35,508 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:53:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:53:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1832678864, now seen corresponding path program 15 times [2021-10-28 09:53:35,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:53:35,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084056898] [2021-10-28 09:53:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:53:35,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:53:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:53:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:53:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:53:36,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:53:36,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084056898] [2021-10-28 09:53:36,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084056898] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:36,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826952837] [2021-10-28 09:53:36,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:53:36,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:53:36,056 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:53:36,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:53:37,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 09:53:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:53:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 09:53:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:53:37,719 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:53:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-28 09:53:37,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 09:53:38,379 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-28 09:53:38,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-10-28 09:53:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-10-28 09:53:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826952837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:53:38,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:53:38,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2021-10-28 09:53:38,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727972902] [2021-10-28 09:53:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 09:53:38,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:53:38,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 09:53:38,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:53:38,467 INFO L87 Difference]: Start difference. First operand 808 states and 918 transitions. Second operand has 36 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:53:42,814 INFO L93 Difference]: Finished difference Result 1120 states and 1208 transitions. [2021-10-28 09:53:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-10-28 09:53:42,815 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-10-28 09:53:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:53:42,815 INFO L225 Difference]: With dead ends: 1120 [2021-10-28 09:53:42,815 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:53:42,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1166, Invalid=8734, Unknown=0, NotChecked=0, Total=9900 [2021-10-28 09:53:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:53:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:53:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:53:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:53:42,818 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2021-10-28 09:53:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:53:42,818 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:53:42,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:53:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:53:42,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:53:42,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION [2021-10-28 09:53:42,821 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION [2021-10-28 09:53:42,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION [2021-10-28 09:53:42,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION [2021-10-28 09:53:42,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr4REQUIRES_VIOLATION [2021-10-28 09:53:42,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr5REQUIRES_VIOLATION [2021-10-28 09:53:42,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr6REQUIRES_VIOLATION [2021-10-28 09:53:42,822 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr7REQUIRES_VIOLATION [2021-10-28 09:53:42,823 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr8REQUIRES_VIOLATION [2021-10-28 09:53:42,823 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr9REQUIRES_VIOLATION [2021-10-28 09:53:42,823 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:53:42,823 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:53:42,823 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:53:42,823 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:53:42,824 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:53:42,824 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:53:42,824 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:53:42,824 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:53:42,824 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:53:42,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:53:43,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:53:43,053 INFO L731 BasicCegarLoop]: Path program histogram: [15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:53:43,055 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:53:43,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:53:43 BoogieIcfgContainer [2021-10-28 09:53:43,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:53:43,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:53:43,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:53:43,059 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:53:43,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:48:57" (3/4) ... [2021-10-28 09:53:43,062 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:53:43,069 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:53:43,069 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-10-28 09:53:43,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 09:53:43,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 09:53:43,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 09:53:43,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 09:53:43,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:53:43,070 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 09:53:43,082 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-28 09:53:43,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-28 09:53:43,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 09:53:43,083 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:53:43,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:53:43,117 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:53:43,118 INFO L168 Benchmark]: Toolchain (without parser) took 287061.84 ms. Allocated memory was 109.1 MB in the beginning and 406.8 MB in the end (delta: 297.8 MB). Free memory was 71.8 MB in the beginning and 68.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 299.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:43,118 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 109.1 MB. Free memory was 83.1 MB in the beginning and 83.1 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:53:43,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 534.96 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 78.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:43,119 INFO L168 Benchmark]: Boogie Preprocessor took 60.19 ms. Allocated memory is still 109.1 MB. Free memory was 78.1 MB in the beginning and 75.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:43,119 INFO L168 Benchmark]: RCFGBuilder took 721.35 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 54.4 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:43,120 INFO L168 Benchmark]: TraceAbstraction took 285680.50 ms. Allocated memory was 109.1 MB in the beginning and 406.8 MB in the end (delta: 297.8 MB). Free memory was 53.9 MB in the beginning and 72.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 281.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:43,120 INFO L168 Benchmark]: Witness Printer took 58.45 ms. Allocated memory is still 406.8 MB. Free memory was 72.3 MB in the beginning and 68.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:53:43,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 109.1 MB. Free memory was 83.1 MB in the beginning and 83.1 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 534.96 ms. Allocated memory is still 109.1 MB. Free memory was 71.6 MB in the beginning and 78.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.19 ms. Allocated memory is still 109.1 MB. Free memory was 78.1 MB in the beginning and 75.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 721.35 ms. Allocated memory is still 109.1 MB. Free memory was 75.5 MB in the beginning and 54.4 MB in the end (delta: 21.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 285680.50 ms. Allocated memory was 109.1 MB in the beginning and 406.8 MB in the end (delta: 297.8 MB). Free memory was 53.9 MB in the beginning and 72.3 MB in the end (delta: -18.4 MB). Peak memory consumption was 281.5 MB. Max. memory is 16.1 GB. * Witness Printer took 58.45 ms. Allocated memory is still 406.8 MB. Free memory was 72.3 MB in the beginning and 68.7 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 285.6s, OverallIterations: 45, TraceHistogramMax: 9, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 221.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2273 SDtfs, 10790 SDslu, 9459 SDs, 0 SdLazy, 61573 SolverSat, 1173 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 45.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3040 GetRequests, 1561 SyntacticMatches, 21 SemanticMatches, 1458 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21025 ImplicationChecksByTransitivity, 184.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2973occurred in iteration=42, InterpolantAutomatonStates: 880, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 45 MinimizatonAttempts, 5389 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 39.0s InterpolantComputationTime, 3973 NumberOfCodeBlocks, 3945 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 3902 ConstructedInterpolants, 387 QuantifiedInterpolants, 43382 SizeOfPredicates, 298 NumberOfNonLiveVariables, 6917 ConjunctsInSsa, 1069 ConjunctsInUnsatCore, 71 InterpolantComputations, 19 PerfectInterpolantSequences, 1359/5493 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 09:53:43,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e403257-a2c0-4802-9b79-9d9e4a74fef3/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...